Geographic Groups Research Articles

Preliminary assessment of genetic variation in the Japanese endemic freshwater crab, Geothelphusadehaani, based on mitochondrial DNA sequences.

Geothelphusadehaani, a freshwater crab species endemic to Japan, has the largest distribution range amongst the 19 known species in the country. Due to its low dispersal capability and restricted habitat to freshwater, it serves as an excellent model for understanding gene flow between geographically isolated populations. In this study, we analysed the genetic relationships of 26 G.dehaani populations collected from different locations in the Japanese archipelago using two mitochondrial DNA regions - cytochrome oxidase subunit I (COI) and cytochrome b (cytB). Our results from the analysis of molecular variance (AMOVA) revealed high genetic variation amongst populations and the phylogenetic analysis identified four geographical groups: Clade I - Honshu and Shikoku, Clade II - north-eastern Kyushu, Clade III - southern Kyushu and Clade IV - north-western Kyushu. Notably, Clade IV exhibited the highest genetic distance amongst the observed groupings. These findings highlight the need for further examination of G.dehaani in Kyushu, including morphological and behavioural traits, to better understand the observed diversity within the species in the region.

Prevalence of Luminal A, Luminal B, HER2 enriched and triple negative breast carcinoma in population of Sindh

The incidence of breast cancer has increased significantly in Asian countries in comparison to Western countries, and it is now one of the leading causes of cancer-related death among women worldwide. Each year, 1.5 million women (25% of all cancer women) are diagnosed with BC around the world, and this number is expected to rise to 2.2 million by 2025. In particular, breast cancer shows biologic heterogeneity in terms of risk factors, natural histories, responses to therapy, and prognostic features that vary considerably between ethnic and geographical groups. Many studies have focused on the distinctions between tumor subtypes because of the importance they play in guiding therapeutic decision making in breast cancer. These factors include histological grade, tumor type and size, and the presence of lymph node metastasis. As a proxy for profiling gene expression, immunohistochemical examination of breast cancer tissue with various biomarkers is employed. This method is cheap, widely accessible, reliable, and technically not demanding. The purpose of this research was to analyze the relationship between molecular subtypes of breast cancer and certain pathological characteristics.

Introduction to the Compendium on Early Cardiovascular Disease.

Introduction to the Compendium on Early Cardiovascular Disease.

Systematics and biogeography of Anoura cultrata (Mammalia, Chiroptera, Phyllostomidae): a morphometric, niche modeling, and genetic perspective, with a taxonomic reappraisal of the genus.

The nectar-feeding bats of the genus Anoura are widely distributed in the Neotropics, but are most speciose in the Andes. Anoura cultrata is a rare mid-elevation bat occurring in South and Central America. It is thought to be one of the few bat species exemplifying a latitudinal cline in body size. We address three systematic and biogeographic questions: 1) is the geographic variation in A. cultrata continuous, as argued to justify its current monotypic status? 2) do ecogeographic barriers to dispersal affect such variation? and 3) how do the genetic divergence and biogeography of the species compare to those of other members of the genus? To answer these questions, we used morphometric analyses, ecological niche modeling, and DNA barcoding. We divided the samples of A. cultrata into six geographic groups, delimited by topographic depressions separating mountain systems. We did not find significant correlations between body size and the geographic coordinates within five groups. Therefore, we conclude that ecogeographic barriers to dispersal between the regions occupied by such groups influenced morphometric variation in A. cultrata, and that despite its general north to south reduction in body size, the species does not show continuous clinal variation. A recent phylogenetic study of the genus Anoura concluded that it contains seven valid species. Our DNA barcoding analysis and morphological examination indicated that at least 10 species should be recognized, including A. peruana distinct from A. geoffroyi, and A. aequatoris and A. luismanueli distinct from A. caudifer. Moreover, we show that Central and South American populations of A. cultrata differ from each other at least at the subspecific level, thus we respectively refer to them as A. cultrata cultrata and as A. c. brevirostrum. Similarly, we refer to Central American and Mexican populations of 'A. geoffroyi' as A. peruana lasiopyga, and to their South American counterparts as A. p. peruana. The range of the latter subspecies reaches northeastern Venezuela. The Andes from southern Colombia to northern Peru appear to be the ancestral range of the genus.

Final prespecified overall survival (OS) analysis of CLEAR: 4-year follow-up of lenvatinib plus pembrolizumab (L+P) vs sunitinib (S) in patients (pts) with advanced renal cell carcinoma (aRCC).

4502 Background: In the phase 3 CLEAR trial, L+P showed clinically meaningful and statistically significant benefits in PFS (primary endpoint) and OS, and improved ORR compared with S in 1L aRCC (Motzer NEJM 2021). Here, we report 4-yr follow-up results from the final prespecified OS analysis of CLEAR (data cutoff: 31 Jul 2022). Methods: Treatment-naïve pts (n=1069) who had aRCC with a clear-cell component were randomized (1:1:1) to receive: L 20 mg PO QD + P 200 mg IV Q3W; or L 18 mg + everolimus 5 mg PO QD; or S 50 mg PO QD (4 wks on/2 wks off). Stratification factors were geographic region and MSKCC prognostic risk group. This final prespecified OS analysis was triggered by ~304 death events in 2 arms. OS, PFS, ORR, duration of response (DOR), and PFS on next-line therapy (PFS2) were assessed for L+P and S. PFS, ORR and DOR were assessed per independent review using RECIST v1.1. Nominal P-values are shown. Results: At a median follow-up (IQR) of 49.8 mos (41.4–53.1) for L+P and 49.4 mos (41.6–52.8) for S, 149 and 159 deaths had occurred, respectively. OS benefit with L+P vs S was maintained (HR, 95% CI; 0.79, 0.63–0.99). OS favored L+P vs S across MSKCC risk groups (HR, 95% CI; favorable [fav]: 0.89, 0.53–1.50; intermediate [int]: 0.81, 0.62–1.06; poor: 0.59, 0.31–1.12). PFS benefit of L+P vs S was maintained (HR, 95% CI; 0.47, 0.38–0.57). PFS favored L+P vs S across MSKCC risk groups (HR, 95% CI; fav: 0.46, 0.32–0.67; int: 0.51, 0.40–0.65; poor: 0.18, 0.08–0.42). ORR was greater with L+P (71.3%; complete response [CR], 18.3%) vs S (36.7%; CR, 4.8%) (relative risk, 95% CI; 1.94, 1.67–2.26). Less pts in the L+P arm (181/355, 51.0%) received subsequent anticancer therapies compared with the S arm (246/357, 68.9%); 56 (15.8%) and 195 (54.6%) received PD-1/PD-L1 checkpoint inhibitors, respectively. Analysis of OS adjusted for subsequent therapies will be presented. PFS2 was longer with L+P vs S (43.3 vs 25.9 mos; HR, 95% CI; 0.63, 0.51–0.77). Grade ≥3 treatment-related adverse events occurred in 74.1% and 60.3% pts in the L+P and S arms, respectively. Conclusions: L+P continues to demonstrate clinically meaningful benefit vs S in OS, PFS, ORR, and CR in the 1L treatment of pts with aRCC at 4-yr follow-up, thus supporting the robustness of the primary analysis data from CLEAR. Clinical trial information: NCT02811861 .[Table: see text]

Tracing the geographical origin of tobacco at two spatial scales by stable isotope and element analyses with chemometrics.

Tobacco is a widely cultivated cash crop, but it is often smuggled and sold illegally. Unfortunately, there is currently no way to verify the origin of tobacco in China. In an effort to address this issue, we conducted a study using stable isotopes and elements from 176 tobacco samples at both provincial and municipal scales. Our findings revealed significant differences in δ13C, K, Cs, and 208/206Pb at the provincial-level, and Sr, Se, and Pb at the municipal level. We created a heat map at the municipal level, which showed a similar cluster classification to geographic grouping and provided an initial assessment of tobacco origins. Using OPLS-DA modeling, we achieved a 98.3% accuracy rate for the provincial scale and 97.6% for the municipal scale. It is worth noting that the importance of rankings of variables varied depending on the spatial scale of the evaluation. This study offers the first traceability fingerprint dataset of tobacco and has the potential to combat mislabeling and fraudulent conduct by identifying the geographical origin of tobacco.

Root Dentin Translucency based Dental Age Estimation in Adults: A Systematic Review

Background: In Forensic practice and research, the Gustafson technique is the most popular dental age estimation method that uses six variables, among which Root Dentin Translucency (RDT) is considered to be the best single parameter for dental age estimation as it is the least affected by environmental and pathological factors. Dental age estimation by RDT has been tested on different geographic groups in order to determine its applicability and it has been found that there was an under/overestimation of the age of the subjects in different populations. No systematic review of these studies has yet been published to check the reliability and accuracy of this novel method in estimating chronological age. Objective: To assess the accuracy and reliability of RDT-based dental age estimation in different academic and forensic scenarios by qualitatively summarising the results of RDT-based dental age estimation studies in diverse population samples. Evidence Review: Studies were searched in the Medline, Embase, Directory of open access journals, Cochrane library and Google Scholar databases up to December 2019 with previously defined inclusion and exclusion criteria. The outcome of interest was the difference between chronological age and the age estimated from RDT. Results and Conclusion: A total of 1754 subjects from 16 published studies were included in the final review. Our findings proved that the RDT method tends to overestimate chronological age for both sexes in most of the study population. The overestimated dental age ranges from 2.24 to 15.1 years.

Metagenomic Sequencing Analysis Identifies Cross-Cohort Gut Microbial Signatures Associated With Age-Related Macular Degeneration.

Alterations in the gut microbiota have been associated with age-related macular degeneration (AMD). However, the dysbiosis shared by different ethnicity and geographic groups, which may associate with the disease pathogenesis, remain underexplored. Here, we characterized dysbiosis of the gut microbiota in patients with AMD from Chinese and Swiss cohorts and identified cross-cohort signatures associated with AMD. Shotgun metagenomic sequencing was performed on fecal samples from 30 patients with AMD and 30 healthy subjects. Published datasets with 138 samples from Swiss patients with AMD and healthy subjects were re-analyzed. Comprehensive taxonomic profiling was conducted by matching to the RefSeq genome database, metagenome-assembled genome (MAG) database, and Gut Virome Database (GVD). Functional profiling was performed by reconstruction of the MetaCyc pathways. The α-diversity of the gut microbiota was decreased in patients with AMD according to taxonomic profiles generated using MAG but not RefSeq database as reference. The Firmicutes/Bacteroidetes ratio was also decreased in patients with AMD. Among AMD-associated bacteria shared between Chinese and Swiss cohorts, Ruminococcus callidus, Lactobacillus gasseri, and Prevotellaceae (f) uSGB 2135 were enriched in patients with AMD, whereas Bacteroidaceae (f) uSGB 1825 was depleted in patients with AMD and was negatively associated with hemorrhage size. Bacteroidaceae was one of the major hosts of phages associated with AMD. Three degradation pathways were reduced in AMD. These results demonstrated that dysbiosis of the gut microbiota was associated with AMD. We identified cross-cohort gut microbial signatures involving bacteria, viruses, and metabolic pathways, which potentially serve as promising targets for the prevention or treatment of AMD.

Genetic diversity and population structure of the endangered Japanese sea cucumber (Apostichopus japonicus) in natural seas of northern China

Overfishing and habitat destruction have decimated wild sea cucumber (Apostichopus japonicus) stocks, causing this species to become endangered. Several conservation measures have been implemented to assist in the recovery of A. japonicus. Due to the low efficiency of conventional domestication methods and the current prevalence of bottom-sowing culture in marine ranches, it is urgent to evaluate the genetic diversity and population structure of sea cucumber geographical groups in the natural seas of northern China using genome-wide molecular markers. In this study, six sea cucumber geographical groups were collected from marine ranches in Shandong, Hebei, and Liaoning provinces. A total of 18,191 high-quality genome-wide single nucleotide polymorphisms (SNPs) were identified in 70 A. japonicus individuals using 2b-RAD technology. These SNPs were used to assess the genetic diversity and population structure of the six groups. Compared with previous studies, these six geographical groups showed much lower levels of genetic diversity both among and between groups, with all individuals clustering into one population. These findings demonstrate the necessity of continuous genetic monitoring of A. japonicus in the natural seas of northern China. Furthermore, this study serves as a valuable reference for future genome-assisted breeding and germplasm improvement in this economically critical species.

Trends in the Consumption of Antidepressant Drugs before and during the COVID-19 Pandemic in the Canary Islands, Spain: The Case of the Province of Las Palmas.

The use of antidepressants (ADs) has increased significantly as a result of COVID-19 and its consequences. However, there are some notable differences in the relative levels of use between geographical areas and population groups. The aim of this work is to assess the impact of COVID-19 on the consumption of ADs in the Canary Islands, focusing on the islands of Gran Canaria, Fuerteventura and Lanzarote, by analyzing the trends in prescriptions of ADs during the pandemic period (2020) compared to the pre-pandemic period (2016-2020). Data were extracted from the community pharmacy wholesaler at a population level. Consumption patterns are expressed as the number of defined daily doses per 1000 inhabitant/day. The overall consumption of DIDs was higher in Gran Canaria, mainly in urban areas and the capital. It was similar in both Lanzarote and Fuerteventura, but particularly localized in the capital, which are considered semi-urban areas. Lanzarote and Fuerteventura present the same pattern of prescription ADs use, whereas Gran Canaria is notably different. This finding was also observed in the more consumed active pharmaceutical ingredients, although small inter-island variations in the ranking and percentages were observed. Sertraline and escitalopram are two of the most prescribed N06AB ADs, whereas the most recent N06AX ADs such as venlafaxine, mirtazapine and desvenlafaxine are more commonly prescribed. These differences in prescription ADs can be explained by demographical characteristics, population size, the fact of living in an urban area and general medical practice. In this context, the COVID-19 pandemic did not have an impact on the overall trend of the use of ADs between 2016 and 2020 in the islands under study.

VARIABILITY ANALYSIS OF WILD GUATEMALAN AVOCADO GERMPLASM BASED ON AGRO-MORPHOLOGICAL TRAITS

<p><strong>Background. </strong>For the Guatemalan culture, the avocado (<em>Persea americana</em> Mill) represents more than a crop, since it has religious, mythical, economical, and medicinal significance typical of the center of domestication of the species. Although there is speculation about the wide variability of wild avocado germplasm, there are no studies describing avocado populations. <strong>Objective.</strong> To explore wild germplasm based on agro-morphological characteristics using the standardized descriptors for avocado (<em>Persea</em> spp.). <strong>Methodology. </strong>The distribution of characteristics of 189 avocado trees across eight populations was evaluated using cross-tabulation and Chi-square testing. In order to properly handle qualitative and quantitative data, it was employed the factor analysis of mixed data (FAMD) and hierarchical clustering on principal components (HCPC) to analyze the relationship and variation of features within and between populations. <strong>Results.</strong> The samples showed various morphological characteristics that indicate the presence of Mexican, Guatemalan, and West Indian avocado races in Guatemala. The FAMD revealed that the fruit shape, skin color and flesh texture, and anise odor in the leaves are ideal traits for distinguishing between individual trees. At the population level, the HCPC showed considerable variance amongst the studied trees but no distinct geographic groups of the samples. <strong>Implications.</strong> Although not all wild avocados grown in Guatemala are of the highest quality, several trees of extraordinary excellence are strewn over the republic's highlands. Thus, due to the danger posed by the introduction of commercial varieties, it is advisable preserving the germplasm. <strong>Conclusion. </strong>The clustering methods revealed that the 189 avocado trees could be regrouped into three main clusters. The morphological descriptors proved to be useful for grouping trees according to known races and can therefore be used in the characterization of cultivars and wild trees whose ancestry is unknown.</p>

Changing socioeconomic and geographic gradients in cardiovascular disease risk factors among Indians aged 15-49 years - evidence from nationally representative household surveys.

Cardiovascular diseases (CVDs) are the leading cause of death in most low- and middle-income countries (LMICs). CVDs and their metabolic risk factors have historically been concentrated among urban residents with higher socioeconomic status (SES) in LMICs such as India. However, as India develops, it is unclear whether these socioeconomic and geographic gradients will persist or change. Understanding these social dynamics in CVD risk is essential for mitigating the rising burden of CVDs and to reach those with the greatest needs. Using nationally representative data with biomarker measurements from the fourth (2015-16) and fifth (2019-21) Indian National Family and Health Surveys, we investigated trends in the prevalence of four CVD risk factors: smoking (self-reported), unhealthy weight (BMI ≥25 ), diabetes (random plasma glucose concentration ≥200mg/dL or self-reported diabetes), and hypertension (one of: average systolic blood pressure ≥140mmHg, average diastolic blood pressure ≥90mmHg, self-reported past diagnosis, or self-reported current antihypertensive medication use) among adults aged 15-49 years. We first described changes at the national level and then trends stratified by place of residence (urban versus rural), geographic region (northern, northeastern, central, eastern, western, southern), regional level of development (Empowered Action Group member state or not), and two measures of socioeconomic status: level of education (no education, primary incomplete, primary complete, secondary incomplete, secondary complete, higher) and wealth (quintiles). Unhealthy weight increased among all social and geographic groups but both the absolute and the relative changes were substantially higher among people with low SES (as measured by education or wealth) and in rural areas. For diabetes and hypertension, the prevalence increased for those from disadvantaged groups while staying constant or even decreasing among the wealthier and more educated. In contrast, smoking consumption declined for all social and geographic groups. In 2015-16, CVD risk factors were higher among more advantaged subpopulations in India. However, between 2015-16 and 2019-21, the prevalence of these risk factors grew more rapidly for less wealthy and less educated subpopulations and those living in rural areas. These trends have resulted in CVD risk becoming far more widespread throughout the population; CVD can no longer be characterized as a wealthy urban phenomenon. This work was supported by the Alexander von Humboldt Foundation (grant received by NS); the Stanford Diabetes Research Center [grant received by PG] and the Chan Zuckerberg Biohub [grant received by PG].

Naïve no more: Foreign direct investment screening in the European Union

AbstractThis paper asks what explains the creation and comparative features of national Investment Screening Mechanisms (ISMs) in Europe. After providing a brief history and definition of ISMs, we provide descriptive patterns about the similarities and differences in the investment screening features of national ISMs in EU member states. We then explain differences in national screening policies by focusing on the role of public debt, Chinese investment, R&D expenditures and various geographic groupings. Finally, we make three policy arguments about the rise of ISMs in Europe: (1) ISMs have not been designed as protectionist instruments, (2) the politics of inward investment screening reflects a shift from economic to security logic in addressing the fundamental tension between the benefits and vulnerabilities of open markets and (3) the EU can use the ‘commercialisation’ of security to extend its own competence in the security sphere. We conclude by considering how the rapid expansion of investment screening in Europe could affect economic openness, as well as the role of the EU as a global actor.

Phylogeography of Oaks in the Crimea Reveals Pleistocene Refugia and Migration Routes

Chloroplast DNA variability was examined in 872 trees of pedunculate oak (Q. robur L.), sessile oak (Q. petraea (Matt.) Liebl.) and downy oak (Q. pubescens Willd.) on the Crimean Peninsula, in the Western Caucasus and in the Balkan region in order to study phylogeography and interaction of these species in the Black Sea region. Sequencing of five fragments with a total length of more than 10,000 base pairs revealed 12 haplotypes of chloroplast DNA. For the haplotype typing in the studied populations, chloroplast microsatellites (cpSSR), sequencing, and restriction analysis were used. Haplotypes detected belong to several divergent phylogenetic lineages. The studied species almost do not differ from each other in the composition of haplotypes and the geographical structure of variability, which demonstrates a certain level of gene flow between them in mixed populations. The haplotypes of the Balkan region are closely related to the haplotypes of previously studied populations from Eastern Europe and the western part of the Russian Plain, and are not found in the Crimea and the Caucasus. On the Crimean Peninsula, two geographical groups of populations are distinguished, which differ sharply in the composition of haplotypes. The difference between the western part of the peninsula and the eastern part is shown, which suggests a multiple origin of oak populations in the Crimea as a result of migrations from two sources, which could be facilitated by fluctuations in the Black Sea level and its desalination, which repeatedly occurred in the Pleistocene and Holocene. The predominance of two divergent haplotypes in the western part of the peninsula, similar to the haplotypes of Asia Minor, indicates the penetration of oak from this region and the presence of an isolated refugium in the mountainous forest regions of Crimea during the last glacial maximum. At the same time, haplotypes common with the Western Caucasus are spread in the east of the mountain-forest part of the Eastern Crimea. The sharp boundary between the areas of distribution of “western” and “eastern” haplotypes in the Eastern Crimea indicates a relatively recent time of the formation of a secondary contact zone between local and Caucasian oak populations as a result of postglacial colonization.

Variation in Anatomical Position of Vermiform Appendix

Background: Delaying acute appendicitis diagnosis may cause appendix perforation and abscess or peritonitis. Appendectomy is one of the most common surgeries in Pakistan, however little is known about vermiform appendix variation architecture. Hence, appendix anatomy may improve prognosis, this research identified appendix anatomical locations, length, and age and sex relationships. Objective: This study aimed to identify the anatomical sites of the appendix, the length of the appendix and to examine the associations between these factors and age and sex. Study Design: Retrospective cross-sectional study Study Setting: This study was conducted in anatomy department of Islamic International Medical College, Rawalpindi from August 2022 to January 2023. Methodology: This retrospective cross-sectional research was completed in the (department and hospital name) between (year). This study was approved from Ethical review committee with IRB (no). The patients reports were taken for the completion of the study. The CT scan of both gender from 8 to 60 years with the help radiologist suggestions were included in this study. Together with a radiologist, we analyzed CT axial images, a coronal of 1.5 mm thickness, and a sagittal reconstruction to assess the anatomical findings of the vermiform appendix retrospectively. Results: There were 300 total participants in this research, 165 (55%) were female and 135 (45%) were male between 8years to 60 years of age. In both sexes, the following sites were found Pelvic, Post ileal, Pre ileal, Retro caecal, Retro colic, Retro Para colic, and Sub caecel. Appendix length and site was shown to be significantly different in gender and age (p<0.001). Children less than 10 years old were more likely to have an incomplete mesoappendix. According to our findings, males have a longer appendix than females do. On the other hand, we discovered that the appendix tends to become longer with age. Practical implication: The location of the appendix reportedly varies among ethnic and geographical groups. Preoperative planning requires knowledge of these variations. Although appendectomy is one of the most common operations in Pakistan, very little is known about vermiform appendix variation anatomy in the country. Conclusion: This study's findings showed that the vermiform appendix is most often seen in the pelvic position on CT in the Karachi-based population. In conclusion, the high prevalence of anterior location and full mesoappendix in our group suggests that acute appendicitis may be more easily and quickly diagnosed in our demographic, with fewer instances of sequelae including perforation and gangrene. Keywords: Vermiform Appendix, Pelvic, Post ileal, Pre ileal, Retro caecal, Retro colic, Retro Para colic, and Sub caecel

Tele-stroke services in rural areas of Nepal: a dire need

With the increasing burden of non-communicable diseases in South Asian countries, Nepal also holds a pertinent position with the rapidly increasing prevalence of non-communicable diseases. Among the South Asian countries with the least developed health infrastructure in Nepal, the hurdles of providing equal health services to all demographic and geographic groups of people had always been a matter of serious concern. Moreover, the citizens of rural Nepal had always been kept at a distance from even minor to several major healthcare services for decades and stroke-related illness falls under one of those major diseases with spiking rates of hypertension and diabetes mellitus. Traditional risk factors, lifestyle and feeding practices of those regions combined with arduous transportation facilities barring the rural citizens from getting health care services from tertiary care centers have increased morbidity rates as well. Along with it the numbers of neurologists and stroke centers providing specialist services are not in par with the burden of stroke-related illness. Adding to it such stroke care services are below scarce level and completely devoid in most of the areas of rural Nepal which is a matter of global health concern. Telestroke service if properly implemented can act a modern solution to provide access to such special health care services preventing rural citizens from lifelong disability and dependence.

PRE-RETIREMENT PLANNING OF EXPATRIATE INSTRUCTORS: APPLICATION OF THEORY OF PLANNED BEHAVIOR TO THE CASE OF THE SULTANATE OF OMAN

With aging population of many countries, problems related to retirement become more and more important. At the same time, globalization resulted in emergence of new cultural groups that didn’t exist just several decades ago. Focus of the present study was to determine predictors of pre-retirement behavior of expatriate instructors. This was done through application of the Theory of Planned Behavior. The study was based on a sample of 76 academicians employed in the Sultanate of Oman. The proposed model demonstrated good explanatory ability. Attitude and perceived behavioral control constructs proved to be good predictors of retirement behavior, while the impact of subjective norms was not confirmed. Further research can be conducted in different geographical locations and different occupational groups.

Interspecies/Intergroup Complementation of Orthotospovirus Replication and Movement through Reverse Genetics Systems.

Orthotospoviruses, the plant-infecting bunyaviruses, cause serious diseases in agronomic crops and pose major threats to global food security. The family of Tospoviridae contains more than 30 members that are classified into two geographic groups, American-type and Euro/Asian-type orthotospovirus. However, the genetic interaction between different species and the possibility, during mixed infections, for transcomplementation of gene functions by orthotospoviruses from different geographic groups remains underexplored. In this study, minireplicon-based reverse genetics (RG) systems have been established for Impatiens necrotic spot virus (INSV) (an American-type orthotospovirus) and for Calla lily chlorotic spot virus and Tomato zonate spot virus (CCSV and TZSV) (two representative Euro/Asian orthotospoviruses). Together with the earlier established RG system for Tomato spotted wilt virus (TSWV), a type species of the Orthotospovirus American-clade, viral replicase/movement proteins were exchanged and analyzed on interspecies transcomplementation. Whereas the homologous RNA-dependent RNA polymerase (RdRp) and nucleocapsid (N) protein supported the replication of orthotospoviruses from both geographic groups, heterologous combinations of RdRp from one group and N from the other group were unable to support the replication of viruses from both groups. Furthermore, the NSm movement protein (MP), from both geographic groups of orthotospoviruses, was able to transcomplement heterologous orthotospoviruses or a positive-strand Cucumber mosaic virus (CMV) in their movement, albeit with varying efficiency. MP from Rice stripe tenuivirus (RSV), a plant-infecting bunyavirus that is distinct from orthotospoviruses, or MP from CMV also moves orthotospoviruses. Our findings gain insights into the genetic interaction/reassortant potentials for the segmented plant orthotospoviruses. IMPORTANCE Orthotospoviruses are agriculturally important negative-strand RNA viruses and cause severe yield-losses on many crops worldwide. Whereas the emergence of new animal-infecting bunyaviruses is frequently associated with genetic reassortants, this issue remains underexposed with the plant-infecting orthotospovirus. With the development of reverse genetics systems for orthotospoviruses from different geographic regions, the interspecies/intergroup replication/movement complementation between American- and Euro/Asian-type orthotospoviruses were investigated. Genomic RNAs from American orthotospoviruses can be replicated by the RdRp and N from those of Euro/Asia-group orthotospoviruses, and vice versa. However, their genomic RNAs cannot be replicated by a heterologous combination of RdRp from one geographic group and N from another geographic group. Cell-to-cell movement of viral entity is supported by NSm from both geographic groups, with highest efficiency by NSm from viruses belonging to the same group. Our findings provide important insights into the genetic interaction and exchange ability of viral gene functions between different species of orthotospovirus.

Climate change impacts the distribution of Quercus section Cyclobalanopsis (Fagaceae), a keystone lineage in East Asian evergreen broadleaved forests

East Asian evergreen broadleaved forests (EBFLs) harbor high species richness, but these ecosystems are severely impacted by global climate change and deforestation. Conserving and managing EBLFs requires understanding dominant tree distribution dynamics. In this study, we used 29 species in Quercus section Cyclobalanopsis—a keystone lineage in East Asian EBLFs—as proxies to predict EBLF distribution dynamics using species distribution models (SDMs). We examined climatic niche overlap, similarity, and equivalency among seven biogeographical regions’ species using ‘ecospat’. We also estimated the effectiveness of protected areas in the predicted range to elucidate priority conservation regions. Our results showed that the climatic niches of most geographical groups differ. The western species under the Indian summer monsoon regime were mainly impacted by temperature factors, whereas precipitation impacted the eastern species under the East Asian summer monsoon regime. Our simulation predicted a northward range expansion of section Cyclobalanopsis between 2081 and 2100, except for the ranges of the three Himalayan species analyzed, which might shrink significantly. The greatest shift of highly suitable areas was predicted for the species in the South Pacific, with a centroid shift of over 300 km. Remarkably, only 7.56% of suitable habitat is currently inside protected areas, and the percentage is predicted to continue declining in the future. To better conserve Asian EBLFs, establishing nature reserves in their northern distribution ranges, and transplanting the populations with predicted decreasing numbers and degraded habitats to their future highly suitable areas, should be high-priority objectives.

Genetic diversity and structure of natural populations of Arbutus unedo across altitude, bioclimate and geographical origin as revealed by ISSR markers

In order to assess the genetic diversity and structure of Arbutus unedo species, 66 individuals’ trees from 11 natural populations representing its main geographical area in Morocco and belonging to different bioclimates and altitude were analyzed using 14 ISSR primers. A total of 142 bands were obtained, of which 134 were polymorphic with a polymorphism percentage of 94.06% and a polymorphism information content (PIC) of =0.47. The use of 134 markers revealed a high level of genetic variation within and between populations. The multi-locus values of Hs and Ht were 0.24 and 0.34, respectively. The overall AMOVA analysis showed that 79.30% of the total genetic variability was within populations and only 20.70% was between populations. A large genetic differentiation between populations was detected (FST=0.206) which could be attributed to restricted gene flow (Nm=0.97). The results of the hierarchical AMOVA, revealed very little genetic differentiation between altitudinal, bioclimatic and geographic groups (FCT=3.20%, FCT= 2.30% and FCT=2.10% respectively). Furthermore, geographic distances were revealed not correlated with genetic distances between populations (r=0.05, Mantel t-test=0.38, P=0.64) suggesting that isolation by distance has not played an important role in shaping the genetic structure of this species. The NJ dendrogram and Bayesian model-based clustering approach identified four groups of A. unedo independently of their bioclimate, geographic origin and altitude. The data obtained in this study could play a crucial role in establish efficient strategies for genetic resources conservation and to work out the scheme of breeding programs of A. unedo