Types Of Markers Research Articles

Exemplification and reformulation in expert linguists’ writings: Elaborative metadiscourse between disciplinarity and individuality

Exemplification and reformulation are key elaborative strategies that empower clarity and argumentation in academic writing. Most research investigating their use in academic writing argues that writers’ choices in terms of frequency and marker type are conditioned by disciplinary variations and the level of expertise of the writers. This has led to an understanding of discourse communities as being homogeneous groups of novice versus expert writers and of separate soft versus hard disciplines. Through the analysis of 90 research articles and book chapters single-authored by six leading linguists, this study shows that these successful authors deviate from the common practices in linguistics and their choices deviate from each other significantly. However, the data does not reveal any steady increasing or decreasing frequencies in the use of exemplification and reformulation throughout their career stages, which makes it hard to claim that the frequency of using the two discourse functions evolves with experience. The study argues that individuality and style preferences within the same discourse community should be acknowledged as an additional variable affecting discursive choices and calls for a more nuanced understanding of disciplinarity and writing expertise.

The effect of different types of cut markers on the utilization of textile materials

The largest percentage of the costs of making clothes belongs to the textile material from which the clothes are made. The essential process in making clothes is the process of cutting the clothes. Before cutting, the cutting pieces and their positions are placed in the cutting marker closer to each other, which will achieve a minimum consumption of the fabric. This paper aims to show the effect of different types of cutting markers on the utilization of textile materials. Emphasis is made on fitting fewer and more sizes in one cutting marker, all in order to practically prove that the type of cutting marker significantly affects the consumption of the textile material from which the clothes are made. In the experimental part, two different orders are shown, with two different models of women’s trousers, but equal size representation and identical fabric. A comparative analysis was made between the efficiency of cut markers with fewer and more sizes contained in the cut marker. The obtained results give a direct conclusion that different types of cutting markers can significantly affect the consumption of textile material, that is, that, using cutting marker in which pieces of more sizes are integrated into one cut marker, the consumption of textile material is significantly reduced.

Thyasirid species composition (Bivalvia: Thyasiridae) and genetic connectivity of Parathyasira equalis (A. E. Verrill & K. J. Bush, 1898) in deep basins of sub-Arctic fjords

BackgroundThyasirid bivalves are often recorded as a dominant component of macrobenthic infaunal communities in depositional environments such as fjord basins. Fjord basins comprise patchy soft-bottom habitats bounded by steep walls and sills; however, little is known how this semi-isolated nature of fjords affects benthic populations. Accordingly, data on the composition and population connectivity of thyasirids can provide valuable information on the ecology of these ecosystems.ResultsThe species composition of thyasirid bivalves has been studied in the basins of three sub-Arctic fjords (Nordland, Northern Norway). Overall, six thyasirid species were recorded: Parathyasira equalis, Parathyasira dunbari, Mendicula ferruginosa, Genaxinus eumyarius, Thyasira sarsii, and Thyasira obsoleta. The species composition remained stable within the basins during the sampling period (2013–2020) and suggested the importance of local reproduction over advection of individuals for population dynamics. Only one species, Parathyasira equalis, was common in all fjords. We have further investigated the population genetics of this species by combining two types of genetic markers: a 579 bp fragment of the cytochrome c oxidase subunit I (COI) gene and 4043 single-nucleotide polymorphisms (SNPs) generated by genotyping-by-sequencing. The latter provided a more in-depth resolution on the population genetics of this species and revealed a weak but significant differentiation of populations within fjords, further indicating limited connectivity between basins.ConclusionBased on our findings, we conclude that limited dispersal between the basin communities results in weakly connected populations and might be an important structuring factor for macrobenthic communities.

Biomarker-Driven Oncology Trial Design and Subgroup Characterization: Challenges and Potential Solutions.

In oncology drug development, using biomarkers to select a study population more likely to benefit from a therapeutic effect is critical to increase the efficiency of a clinical trial in demonstrating effectiveness. This perspective delves into therapeutic product approvals that were tested in pivotal trials with all-comers populations, but ultimately received US Food and Drug Administration approval for use within specific patient subgroups identified by biomarkers. Despite initial designs for efficacy and safety assessments in overall populations, a favorable benefit-risk assessment was primarily established in biomarker-positive subgroups. Analyzing these cases, we summarize key considerations pivotal to totality of evidence for regulatory benefit-risk assessments for biomarker-defined subgroup versus all-comers approvals, including biological and clinical rationales, biomarker prevalence, safety data, overall trial design, and subgroup efficacy characterization. Furthermore, a decision tree is proposed to guide optimal clinical trial design, delineating between patient enrichment and stratification, accounting for key factors including biological and clinical rationale, marker type (discreate or continuous), prevalence, assay readiness, and turnaround times for marker assessment. Finally, a recommended approach for subgroup characterization involves prespecifying magnitude of improvement that would be considered clinically meaningful in the biomarker-negative subgroup, which can be supplemented with methodologies such as Bayesian to incorporate evidence from similar studies when available. In summary, this perspective underscores the importance of clinical trial innovations, statistical methodologies and regulatory considerations, to optimize biomarker-driven drug development for patients with cancer.

A Study on the Concept and type of Complex Discourse Markers

A Study on the Concept and type of Complex Discourse Markers

Adverbia Penanda Aspek dalam Novel Sansai karya Ermanto: Suatu Kajian Morfologi

This study examines the use of adverbial aspect markers in Ermanto's novel Sansai, aiming to revitalize Minangkabau literature by focusing on both cultural and social issues. The research explores how aspect markers influence narrative understanding and temporal dynamics in contemporary Minangkabau prose. Through qualitative document analysis using the Indonesian Language Corpus Linguistic Method (KORTARA), the study identifies and classifies adverbs that denote actions, events, situations, and traits in various temporal contexts. The analysis reveals four types of aspect markers: durative, perfective, imperfective, and inchoative. The novel contains 476 adverbial aspect markers, distributed as follows: 73 durative ("middle"), 64 imperfective ("not yet"), 278 perfective ("already"), and 61 inchoative ("beginning") markers. The perfective aspect "already" emerges as the most frequently used, suggesting a narrative emphasis on completed actions or states. This linguistic analysis provides insights into the narrative structure and temporal nuances of contemporary Minangkabau literature, contributing to a deeper understanding of how language use shapes storytelling and cultural expression. The findings offer a foundation for further exploration of the relationship between linguistic features and literary techniques in regional Indonesian literature.

CHARACTERISTICS OF FOLLICULAR FLUID MORPHOLOGY AND LEVELS OF MATRIX METALLOPROTEINASE-1 AND ITS INHIBITOR-1 IN PATIENTS WITH POLYCYSTIC OVARIES IN ASSISTED REPRODUCTIVE TECHNOLOGY

Assisted reproductive technologies in patients with polycystic ovary syndrome (PCOS) is an effective way to realize reproductive function with a global pregnancy rate of 25–30 %. The purpose of the study is to establish the correlation between the levels of matrix metalloproteinase-1 (MMP-1) and its inhibitor-1 (TIMP-1) with follicular fluid morphology in PCOS patients undergoing assisted reproductive technology. Materials and Methods. The authors examined 26 PCOS patients aged 24–40. All patients were diagnosed with primary and secondary infertility lasting from 1 to 10 years. A comparative analysis of patients was carried out depending on the presence (n=12) or absence (n=14) of concomitant pathology, a history of endometrial hyperplasia. Clinical, anamnestic, instrumental and laboratory methods were used for analysis. Concentrations of MMP-1 and TIMP-1 in follicular fluid was determined by quantitative solid-phase ELISA. Follicular fluid morphology was studied according to wedge-shaped dehydration method. Statistica 10.0 wasnused for statistical data processing. Results. TIMP-1 level in PCOS patients was 2550±57.8 ng/ml, in PCOS patients with endometrial hyperplasia – 2694.4±87.8 ng/ml (p<0.01). At the same time, the average MMP-1 level was low – 1.5±0.1 ng/ml. In PCOS patients, the 3rd (reactive) type of facies and markers indicating impaired blood supply were detected in the follicular fluid. In PCOS patients with endometrial hyperplasia, the 4th (chaotic) type of facies and markers indicating impaired elasticity, vascular sclerosis, and vasospasm was observed. It was found that the higher the TIMP-1 level, the more markers indicating destructive changes in the vessels of ovarian tissue (r=0.7) and the lower the chances of getting pregnant in assisted reproducrtive technology programs. Conclusions. In PCOS patients over 32 years of age, infertility duration of more than 4 years, having endometrial hyperplasia and surgical interventions in the past medical history (tubectomies for sactohydrosalpinx), TIMP-1 level significantly (p<0.05) increases (≥2694 ng/ml) in the follicular fluid. Moreover, markers indicating destructive changes (vascular sclerosis, vasospasm and endothelial dysfunction) are identified. Thus, the chances of getting pregnant in assisted reproducrtive technology programs become lower.

Development and application of molecular markers in fisheries, aquaculture, and industry of representative temperate and tropical sea cucumbers: a review

Sea cucumber has emerged as a crucial economic species in aquaculture in China because of its remarkable nutritional and medicinal value. However, wild sea cucumber populations have experienced a decline due to overfishing and environmental factors, underscoring the urgent need for genetic resource conservation and biotechnology innovation within the sea cucumber aquaculture and breeding industry. The development of the sea cucumber industry is still impeded by challenges and difficulties. Nevertheless, significant progress has been made through the utilization of molecular markers, which have effectively addressed a number of fisheries and aquaculture issues. In recent years, diverse types of molecular markers including mitochondrial DNA, microsatellites, and SNP markers have been developed and extensively applied in various aspects of sea cucumber research. These markers play vital roles in genetic sex identification, germplasm resource evaluation, population structure assessment, as well as marker-assisted breeding in marine ranching and sea cucumber aquaculture and breeding industry. This review provides an overview of the fundamental principles, functions, and characteristics associated with various markers employed across various sea cucumber species while also discussing their applications within different aspects of the sea cucumber fisheries, aquaculture, and breeding industry.

Improved individual identification in DNA mixtures of unrelated or related contributors through massively parallel sequencing

DNA mixtures are a common sample type in forensic genetics, and we typically assume that contributors to the mixture are unrelated when calculating the likelihood ratio (LR). However, scenarios involving mixtures with related contributors, such as in family murder or incest cases, can also be encountered. Compared to the mixtures with unrelated contributors, the kinship within the mixture would bring additional challenges for the inference of the number of contributors (NOC) and the construction of probabilistic genotyping models. To evaluate the influence of potential kinship on the individual identification of the person of interest (POI), we conducted simulations of two-person (2 P) and three-person (3 P) DNA mixtures containing unrelated or related contributors (parent-child, full-sibling, and uncle-nephew) at different mixing ratios (for 2 P: 1:1, 4:1, 9:1, and 19:1; for 3 P: 1:1:1, 2:1:1, 5:4:1, and 10:5:1), and performed massively parallel sequencing (MPS) using MGIEasy Signature Identification Library Prep Kit on MGI platform. In addition, in silico simulations of mixtures with unrelated and related contributors were also performed. In this study, we evaluated 1): the MPS performance; 2) the influence of multiple genetic markers on determining the presence of related contributors and inferring the NOC within the mixture; 3) the probability distribution of MAC (maximum allele count) and TAC (total allele count) based on in silico mixture profiles; 4) trends in LR values with and without considering kinship in mixtures with related and unrelated contributors; 5) trends in LR values with length- and sequence-based STR genotypes. Results indicated that multiple numbers and types of genetic markers positively influenced kinship and NOC inference in a mixture. The LR values of POI were strongly dependent on the mixing ratio. Non- and correct-kinship hypotheses essentially did not affect the individual identification of the major POI; the correct kinship hypothesis yielded more conservative LR values; the incorrect kinship hypothesis did not necessarily lead to the failure of POI individual identification. However, it is noteworthy that these considerations could lead to uncertain outcomes in the identification of minor contributors. Compared to length-based STR genotyping, using sequence-based STR genotype increases the individual identification power of the POI, concurrently improving the accuracy of mixing ratio inference using EuroForMix. In conclusion, the MGIEasy Signature Identification Library Prep kit demonstrated robust individual identification power, which is a viable MPS panel for forensic DNA mixture interpretations, whether involving unrelated or related contributors.

Non-hemorrhagic imaging markers of cerebral amyloid angiopathy in memory clinic patients.

The Boston criteria v2.0 for cerebral amyloid angiopathy (CAA) incorporated non-hemorrhagic imaging markers. Their prevalence and significance in patients with cognitive impairment remain uncertain. We studied 622 memory clinic patients with available magnetic resonance imaging (MRI) and cerebrospinal fluid (CSF) biomarkers. Two raters assessed non-hemorrhagic markers, and we explored their association with clinical characteristics through multivariate analyses. Most patients had mild cognitive impairment; median age was 71 years and 50% were female. Using the v2.0 criteria, possible or probable CAA increased from 75 to 383 patients. Sixty-eight percent of the sample had non-hemorrhagic CAA markers, which were independently associated with age (odds ratio [OR]=1.04, 95% confidence interval [CI]=1.01-1.07), female sex (OR=1.68, 95% CI=1.11-2.54), and hemorrhagic CAA markers (OR=2.11, 95% CI=1.02-4.35). Two-thirds of patients from a memory clinic cohort had non-hemorrhagic CAA markers, increasing the number of patients meeting the v2.0 CAA criteria. Longitudinal approaches should explore the implications of these markers, particularly the hemorrhagic risk in this population. The updated Boston criteria for cerebral amyloid angiopathy (CAA) now include non-hemorrhagic markers. The prevalence of non-hemorrhagic CAA markers in memory clinic patients is unknown. Two-thirds of patients in our memory clinic presented non-hemorrhagic CAA markers. The presence of these markers was associated with age, female sex, and hemorrhagic CAA markers. The hemorrhagic risk of patients presenting these type of markers remains unclear.

The Dative Markers and Their Developments in Hunan Sinitic Languages

This study is based on a sample of 30 Sinitic languages spoken in the Hunan Province. Its first objective is to explore the types of dative markers, comparing the form of the dative with allative, passive, benefactive, and differential object markers in these languages. Five patterns are identified: (I) DAT = ALL (II) DAT = GIVE = OM ≠ PASS; (III) DAT = GIVE = OM = PASS; (VI) DAT = GIVE = PASS ≠ OM; (V) DAT = BEN. Then, we reveal three main possible grammaticalization pathways that motivate the five synchronic patterns: (a) Allative > Dative; (b) (TAKE >) GIVE > Dative; (c) Benefactive > Dative. It concerns two distinct developments for the second pathway. Based on the areal distribution of the various types of dative markers, we can observe how the dative markers are developed in Hunan Sinitic languages.

The relationship between oxidative stress markers and temporomandibular disorders: A systematic review and meta-analysis.

Oxidative stress has a role in many pathologic conditions, including oral diseases and temporomandibular joint disorders (TMDs) pathophysiology. This study compared the selected oxidative biomarkers' levels in TMD patients and healthy controls in a systematic review and meta-analysis. Medline/PubMed, Scopus, Web of Science, Google Scholar, and Embase were systematically searched for English articles up to October 2022 using MeSH and free keywords. Joanna Briggs Institute checklist was used to assess the risk of bias. Differences between biomarker levels in TMD patients were compared to the control group. Ten case-control studies were included based on inclusion and exclusion criteria with a total of 659 patients: 314 with TMD and 345 healthy controls. The studies investigated 15 markers, including total oxidant status (TOS), total antioxidant status, and malondialdehyde (MDA). There was a significant difference in the salivary MDA of patients with TMD in comparison with healthy people; standard mean difference = 3.22 (95% confidence interval [CI]: 0.28-6.16); I 2 = 96.0%). The Antioxidant status in serum was significantly lower in patients with TMD in comparison with healthy people; weighted mean difference = -0.52 (95% CI: -0.90 to -0.14; I 2 = 97.0%). The result of TOS was inconclusive. Salivary MDA and serum total antioxidative status measurements may be used as a biomarker for diagnosing TMD. Due to the lack of sufficient evidence, it is not possible to express a definite relation between the amount and type of marker and TMD diagnosis, which suggests that more case-control studies with larger sample sizes are required.

Limited evidence for genetic differentiation or adaptation in two amphibian species across replicated rural-urban gradients.

Urbanization leads to complex environmental changes and poses multiple challenges to organisms. Amphibians are highly susceptible to the effects of urbanization, with land use conversion, habitat destruction, and degradation ranked as the most significant threats. Consequently, amphibians are declining in urban areas, in both population numbers and abundance, however, the effect of urbanization on population genetic parameters remains unclear. Here, we studied the genomic response to urbanization in two widespread European species, the common toad Bufo bufo (26 localities, 480 individuals), and the smooth newt Lissotriton vulgaris (30 localities, 516 individuals) in three geographic regions: southern and northern Poland and southern Norway. We assessed genome-wide SNP variation using RADseq (ca. 42 and 552 thousand SNPs in toads and newts, respectively) and adaptively relevant major histocompatibility complex (MHC) class I and II genes. The results linked most of the genetic differentiation in both marker types to regional (latitudinal) effects, which also correspond to historical biogeography. Further, we did not find any association between genetic differentiation and level of urbanization at local scales for either species. However, urban smooth newts, but not toads, have lower levels of within-population genome-wide diversity, suggesting higher susceptibility to the negative effects of urbanization. A decreasing level of genetic diversity linked to increasing urbanization was also found for MHC II in smooth newts, while the relationship between MHC class I diversity and urbanization differed between geographic regions. We did not find any effects of urbanization on MHC diversity in the toad populations. Although two genetic environment association analyses of genome-wide data, LFMM and BayPass, revealed numerous (219 in B. bufo and 7040 in L. vulgaris) SNPs statistically associated with urbanization, we found a marked lack of repeatability between geographic regions, suggesting a complex and multifaceted response to natural selection elicited by life in the city.

Bronchopulmonary dysplasia: analysis and validation of ferroptosis-related diagnostic biomarkers and immune cell infiltration features.

Early and precise diagnosis of bronchopulmonary dysplasia (BPD) is essential to improve the prognosis of preterm infants with BPD. Studying ferroptosis-related genes for diagnostic markers of BPD was the objective of this study. Using the GEO database and the FerrDb database, we obtained the GSE32472 dataset and screened the ferroptosis-related differentially expressed mRNAs (FRDE-mRNAs). By using Gene Ontology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG), possible biological functions and pathways were identified for FRDE-mRNAs. Three machine learning algorithms (LASSO, SVM-RFE, Random Forest) were used to recognize hub genes, as well as CIBERSORT for exploring the immune landscape of BPD and controls. Functional predictions for hub genes were made using single-gene gene set enrichment analysis (GSEA). Twenty three FRDE-mRNAs were obtained and were mainly involved in autophagy, fatty acid metabolism and ferroptosis. The four hub genes (LPIN1, ACADSB, WIPI1 and SLC7A11) screened were utilized to construct a diagnostic nomogram. The receiver operating characteristic (ROC) curves and calibration curves demonstrateld that the nomogram exhibited good predictive performance. Eight types of immune cell markers differed significantly between BPD and controls. We developed a diagnostic model for BPD, which could facilitate the early diagnosis and timely intervention of BPD. The role of ferroptosis in bronchopulmonary dysplasia is rarely reported. The ferroptosis-related genes (LPIN1, ACADSB, WIPI1 and SLC7A11) we identified could serve as early diagnostic biomarkers for BPD. Immune cell infiltration features in BPD and signaling pathways associated with marker genes give new insight into the disease process and provide a basis for further research.

Molecular Identification of Genetic Diversity and Population Structure in Moroccan Male Date Palm (Phoenix dactylifera L.) Using Inter-Simple Sequence Repeat, Direct Amplification of Minisatellite DNA, and Simple Sequence Repeat Markers

Understanding genetic diversity and population structure plays a vital role in the efficient use of available material in plant-breeding programs and in germplasm conservation strategies. In the present study, we aim to evaluate the genetic variations and population structure of male date palms from Morocco. The genetic diversity of 100 date palm (Phoenix dactylifera L.) genotypes was investigated using the performance of three types of molecular markers: inter-simple sequence repeats (ISSRs), direct amplification of minisatellite DNA (DAMD), and simple sequence repeats (SSRs). On the basis of their polymorphic information content (PIC) (ISSRs = 0.38; DAMD = 0.4; SSRs = 0.33), effective multiplex ratio (EMR) (ISSRs = 27.34; DAMD = 52.31; SSRs = 22.20), Resolving power Rp (ISSR = 13.81; DAMD = 28.73; SSR = 14.6), and marker index (MI) (ISSRs = 9.22; DAMD = 20.23; SSRs = 7.54) values, all markers used in our study are considered informative markers. Among them, DAMD markers demonstrated slightly higher informativeness compared to ISSR and SSR markers. A total of 216, 438, and 248 bands were, respectively, detected using ISSRs, DAMD, and SSRs, with 95%, 98% and 94% of polymorphism, respectively. The AMOVA results revealed considerable diversity within date palms. The PCOa results showed that males of Tinghir and Errachidia were regrouped into the same cluster, while males of Goulmima were separated into another group. A cluster and structure analysis separated the studied genotypes into three groups. One group comprises genotypes of males from Zagora with some female varieties scattered in this group. The second group includes male genotypes from Goulmima along with accessions of female and male varieties. The third group contains males of Errachidia, Tata and Tinghir populations. The cluster and structure analysis separated the studied genotypes according to their origin.

Simultaneous construction strategy using two types of fluorescent markers for HVT vector vaccine against infectious bursal disease and H9N2 avian influenza virus by NHEJ-CRISPR/Cas9.

Recently, herpesvirus of turkeys (HVT), which was initially employed as a vaccine against Marek's disease (MD), has been shown to be a highly effective viral vector for producing recombinant vaccines that can simultaneously express the protective antigens of multiple poultry diseases. Prior to the development of commercial HVT-vectored dual-insert vaccines, the majority of HVT-vectored vaccines in use only contained a single foreign gene and were often generated using time-consuming and inefficient traditional recombination methods. The development of multivalent HVT-vectored vaccines that induce simultaneous protection against several avian diseases is of great value. In particular, efficacy interference between individual recombinant HVT vaccines can be avoided. Herein, we demonstrated the use of CRISPR/Cas9 gene editing technology for the insertion of an IBDV (G2d) VP2 expression cassette into the UL45/46 region of the recombinant rHVT-HA viral genome to generate the dual insert rHVT-VP2-HA recombinant vaccine. The efficacy of this recombinant virus was also evaluated in specific pathogen-free (SPF) chickens. PCR and sequencing results showed that the recombinant virus rHVT-VP2-HA was successfully constructed. Vaccination with rHVT-VP2-HA produced high levels of specific antibodies against IBDV (G2d) and H9N2/Y280. rHVT-VP2-HA can provide 100% protection against challenges with IBDV (G2d) and H9N2/Y280. These results demonstrate that rHVT-VP2-HA is a safe and highly efficacious vaccine for the simultaneous control of IBDV (G2d) and H9N2/Y280.

Review of the Diagnostic and Prognostic Values of Cardiac Markers in Diabetes

Abstract Introduction Cardiovascular disease is a leading cause of mortality in people with diabetes (PWD). We aimed to explore the role of troponin T (TnT) and probrain natriuretic peptide (proBNP) as screening and prognostic indicators of cardiovascular morbidity and mortality in PWD in the existing literature. Methods This review paper is a focused narrative nonsystematic review of the literature which examined relevant publications pertinent to the significance of cardiac biomarkers. We aimed to investigate the diagnostic value of cardiac TnT (cTnT) and cTnI in addition to proBNP in diabetes and the prognostic value of cTnT and proBNP in diabetic and nondiabetic patients. The process of searching through literature was conducted from December 2022 to April 2023. Searches were done across PubMed and Google Scholar databases to identify relevant articles published from January 2001 to April 2023. The selected were entered into EndNote 20 software to extract the title and abstract. Results A total of 75 articles were identified in Google Scholar in addition to 32 articles from PubMed. After a thorough review, only a total of 22 articles were selected, pointing out those which discussed the pathophysiology and diagnostic, prognostic, and screening values of the types of Tn and proBNP markers. The value of TnT in PWD, specifically T2D, is threefold higher than in healthy patients. Individuals with high levels of high-sensitivity (hs) cTnI or cTnT were at the highest mortality risk. Nonetheless, N-terminal (NT)-proBNP and TnT function independently as predictors of unfavorable outcomes. Conclusions TnT is an important early screening tool prognostic indicator. Elevated TnT was associated with an increased risk of cardiovascular events in PWD. hs-cTn may help diabetes-related clinical care for older persons by identifying those at high mortality risk; furthermore, in diabetic individuals, NT-pro-BNP appears to be 92% sensitive and 90% specific for the diagnosis of heart failure.

Unlocking Genetic Diversity and Germplasm Characterization with Molecular Markers: Strategies for Crop Improvement

Molecular markers have emerged as the most useful tools in assessment of genetic diversity and characterizing germplasm, for crop improvement. This review paper comprehensively analyzes the applications of molecular markers in diversity analysis and germplasm characterization. It underscores the significance of genetic diversity as the bedrock for plant breeding programs, enabling the development of improved varieties with desirable attributes such as higher yields, stress tolerance, and enhanced nutritional profiles. The paper provides an overview of various types of molecular markers, including hybridization-based markers (e.g., RFLPs) and PCR-based markers (e.g., RAPDs, AFLPs, SSRs, and SNPs). It discusses marker selection strategies, emphasizing the consideration of factors like polymorphism, informativeness, and the potential for multiplexing and high-throughput genotyping. Diversity analysis techniques, including principal component analysis (PCA), cluster analysis methods (UPGMA and Neighbor-Joining), and population structure analysis (model-based approaches like STRUCTURE), are detailed. These methods enable the assessment of genetic relationships, identification of subpopulations, and selection of diverse parents based on molecular marker data. The review further explores the applications of molecular markers in germplasm management, conservation, and utilization. It discusses the role of markers in targeted introgression of desirable traits from diverse sources, as well as the integration of genotypic and phenotypic data for association mapping, genomic prediction, and selection. Additionally, the paper addresses emerging technologies, such as next-generation sequencing (NGS) and the integration of molecular markers with other omics data. It also highlights the practical applications and impact of molecular markers in crop improvement programs, including marker-assisted selection (MAS), genomic selection, and the development of genetically modified crops. Finally, the review outlines challenges and future perspectives, including limitations0 of current technologies, the potential of emerging techniques like NGS, and the integration of molecular markers with other omics approaches for a comprehensive understanding of complex traits.

Genetic Variability and Genetic Differentiation of Populations in the Grooved Carpet Shell Clam (Ruditapes decussatus) Based on Intron Polymorphisms

Genetic Variability and Genetic Differentiation of Populations in the Grooved Carpet Shell Clam (Ruditapes decussatus) Based on Intron Polymorphisms

Morpho-Anatomical Characteristics and Volatile Profiles of Pinus nigra J.F.Arnold from the Balkan Peninsula and Southern Carpathians

This is the first report on morpho-anatomical and phytochemical differentiation of 19 native populations representing different Pinus nigra J.F.Arnold subspecies (banatica (Borbás) Novák, dalmatica (Vis.) Franco, nigra, and pallasiana (Lamb.) Holmboe) in the Balkans and Southern Carpathians. The 9 morpho-anatomical characteristics and 10 headspace volatiles of needles were analyzed with multivariate statistical analyses. The combination of results from all multivariate analyses with both types of markers revealed that P. nigra is differentiated into three groups within the studied area (the Dalmatian coast, Greece, and the rest of the Balkans with the Southern Carpathians). The first group included the population from an island in Dalmatia that corresponds to P. nigra subsp. dalmatica. The third group consisted of populations from continental Croatia, Bosnia and Herzegovina, Serbia, Romania, and Bulgaria, which corresponds to P. nigra subsp. nigra. In light of the recent molecular data that indicated that the Greek populations (the second group) represent a distinct genetic lineage of P. nigra placed between the populations from the principal area (P. nigra subsp. nigra) and Turkey (P. nigra subsp. pallasiana), one can speculate that there is one more subspecies of P. nigra in this region that corresponds to populations from Greece. Extending our analyses to Asia Minor and Crimea could bring additional results that would be valuable for clarifying the intriguing issue of the diversification of P. nigra in the eastern part of its range.