Local Genotypes Research Articles

Utilization of rice straw waste compost to increase growth and production of local sweet potatoes

Sweet potato is a functional food that has potential to be cultivated in paddy fields after rice harvesting. Rice straw has the potential to become waste that can pollute the environment. Efforts that can be made to overcome these problems are to use rice straw as a raw material for making compost and apply it to sweet potatoes. This study aims to determine the effect of growth and production of local sweet potato genotypes with rice straw compost. The design used in this study was a Randomized Block Design with two factors, namely local genotypes (Cengkeh Turi yellow tubers, Cengkeh Turi orange tubers, and Tanah Seribu orange tubers) and dose of rice straw compost (0, 5, 10, 15 tons/ha). The results of this study showed that the local genotypes were significantly different in vine length, tuber length and average tuber weight. The application of straw compost at various doses significantly affected the increase in vine length, tuber length and average tuber weight. The interaction of local sweet potato genotypes and rice straw compost increased tuber length. The best growth and production was obtained from the local sweet potato genotype Tanah Seribu orange tubers with 10 tons/ha of rice straw compost.

Vermicompost application to increase sweet potato local genotype yield to support sustainable agriculture

Increased sweet potato yields can be pursued by using superior varieties and local superior genotypes. Each genotype or variety has a different response to the technical culture of fertilization or the use of organic materials. Vermicompost is an organic material that has advantages over other organic materials because it contains many nutrients needed by plants. The purpose of this study was to analyze the effect of vermicompost application on increasing the production of local sweet potato genotypes. The research was conducted in June – October 2020 in Medan Selayang District. The treatments studied in this study were sweet potato genotype (Tanah Seribu orange tubers, Tanah Seribu yellow tubers, Cengkeh Turi orange tubers) as the first factor and dose of vermicompost (0 tons ha-1, 10 tons ha-1, 20 tons ha-1, 30 tons ha-1) as the second factor using a Randomized Block Design. The three genotypes were significantly different in the parameters of tuber weight per plant, number of tubers per plant and harvest index, while the application of vermicompost and interaction of sweet potato genotypes and vermicompost increased tuber weight per plant, harvest index, and grade A fresh tubers.

Determination of The Loss Ratio on Some Melon Varieties From The Melon Fly, Myiopardalis pardalina (Bigot, 1891) (Diptera: Tephritidae)

It is wel known that the homeland of the Melon (Cucumis melo), which is a one-year reptile body, belonging to the Cucurbitaceae family, is Asia. Iran, Caucasus, Turkey, Afghanistan and melon species that are encountered in the wild in Turkistan form and is believed that it was spread to the world from the regions concerned. Melon fly, Myiopardalis pardalina (Bigot, 1891) (Diptera:Tephrtidae) is one of the most important pests in melon grown areas in the Southeastern Anatolia Region. When the melon approximately reaches the size of a hazelnut, the larvae hatched from the eggs that have been left by the female in the fruit shell feed on the flesh and move towards the house of fruit seed with the tunnels they open, leading to various damages. Such damaged melons are not preferred by consumers. Moreover, invincible losses decrease the commercial market value of melon. In this research, data related to different methods of struggle of melon fly which has caused significant economic losses in Southeastern Anatolia region were obtained in the nature conditions. This study was carried out in Diyarbakır Province Çınar District Şükürlü Village (Diyarbakır city, Turkey) in 2018-2019 under field conditions. Four melon varieties (Balhan, Balözü, VT21B and the local variety Winter melon "sliced" local genotype "VN2136") were taken into the experiment and designed with 3 replications. In order to determine the damage rate of the melon fly, 100 fruits were checked in each melon variety parcel. Control procedures were carried out weekly, counts were made and continued until the end of the season. Fruits with dishes were removed from the application plots. In the experiment studies carried out to identify the number of holes in the melon fruits, it was detected that there was no difference when considering the hole number between Balözü, Balhan, Local (winter melon "sliced" local genotype "VN2136") and VT21 melon varieties. when the data collected from this study were under analysis it was revealed that, the lowest number of holes was found in Domestic (Winter melon "sliced" local genotype "VN2136") melon varieties, and the highest hole number was found in Balözü melon variety. In this study, the damage rates of melon fly on some melon varieties were determined.

Assessment of cowpea (<i>Vigna unguiculata (L.</i>) Walp) F<sub>1</sub> lines response to drought tolerance

The objective of this study was to develop cowpea lines and assess them for drought tolerance using the pot screening approach. F1 lines were developed between September and November 2019 at University for Development Studies’ plant house. The drought experiment was conducted between February to March 2020. The F1 lines were developed by an artificial hybridization between the genotype ITK93-503-1 used as a male parent, obtained from the International Institute of Tropical Agriculture. This was crossed to 4 local genotypes used as female parents. The populations raised from the crosses were used to conduct the drought experiment. The experiment was Complete Randomized Design in; a 2 * 5 factorial experiment with 10 experimental units replicated three times, giving a total of 30 experimental units. The factors were; AbF1, GoF1, MF1, SaF1, ITK93-503-1 by Stress and Non-stress conditions. Plants were subjected to water stress for a period of 25 days and various drought related parameters were measured and analyzed. Results showed that water stress significantly (P<0.05) affected the chlorophyll content, leaf area and stem lodging for all F1 lines, however, water stress did not significantly (P>0.05) affect relative leaf water content of the F1 lines. The study showed that F1 lines (AbF1 and GoF1) performed better in chlorophyll content, leaf area, seedling recovery rate and plant main stem lodging. SaF1 recorded the highest relative leaf water content. Identified lines with drought tolerance potential should be further evaluated in subsequent generations to confirm their tolerance to drought for further selection and improvement.

Diversité génétique des cultivars locaux de melon (Cucumis melo L.) collecté au sud tunisien: Valorisation pour un programme de sélection et de conservation génétique

Ce travail a pour objectif d’étudier la diversité génétique des cultivars locaux de melon collecté au sud tunisien. La caractérisation morphologique de 22 cultivars locaux de melon en se basant sur 32 traits a montré qu’ils se distinguent de la variété commerciale Ananas. En effet, les cultivars locaux du Sud se caractérisent par leur précocité, avec des fruits de plus gros calibre et une faible teneur en sucre. La diversité moléculaire des cultivars de melon, évaluée à l'aide de quatre marqueurs RAPD, a montré un taux de polymorphisme global de 95 %. L’analyse ACP selon les trois premiers axes qui résument 54,7 % de la variabilité totale indique une séparation nette entre la variété Ananas et les cultivars locaux. Les corrélations entre les matrices de distance des données morphologiques et des données moléculaires ont montré que les paramètres longueur des fruits, diamètre des fruits, taille de l’attache pistillaire et l’épaisseur maximal de la chair sont significativement corrélés avec plusieurs marqueurs RAPD. Cette étude a montré une nette distinction entre les cultivars locaux de melon et celui commercial, ce qui a un impact pratique par la sélection des cultivars les plus intéressants ou leur utilisation comme géniteurs pour améliorer les variétés commerciales.

Planting Date and Different N-Fertilization Rates Differently Modulate Agronomic and Economic Traits of a Sicilian Onion Landrace and of a Commercial Variety

The onion is one of the most widespread bulb vegetables worldwide. Onion cultivation is common in Sicily, as is the use of local genotypes. Cultivation practices are of particular interest in optimizing yield, quality, and profits. The aim of this study was to assess the agronomic response of a Sicilian landrace (Bianca Calda di Comiso, coded L1) and a commercial variety (Bianca di Maggio, coded V1) to different planting dates and N fertilization rates. An economic appraisal was also performed. The two genotypes were assessed using an experimental split-split-plot design with four levels of nitrogen rates (0, 80, 160, and 220 kg N ha−1) and two different planting dates (8 October 2005 to 9 October 2006 for the early planting date, and 27 December 2005 to 30 December 2006 for the traditional planting date). The marketable yield and production parameters were significantly influenced by the nitrogen dose: higher doses led to a higher total yield, with yield peaks above 60 t ha−1 and the marketable yield ranging from 23% to 54%. Simultaneously, decreases in the firmness (from 7% to 19%) and scale content (from 1% to 3%) were also reported. The L1 landrace showed a higher production than the V1 variety. The crop year did not significantly affect the results, and the traditional planting date appeared to be the most suitable choice in obtaining the best agronomic response. Economic analysis showed that the L1 landrace, with high-N application treatments, produced greater net benefits and marginal rates of return. Thus, the L1 landrace exposed to the highest dosages of nitrogen (160 or 220 kg ha−1) and transplanted during the traditional planting period is the best choice from agronomic and economic points of view.

Managing stakeholder concerns associated with releases of imported stock in insect control programmes.

A commitment to reducing pesticide use and the development of novel technologies are driving a renewed interest in insect-mediated pest and vector control programmes. Such programmes, along with conservation and pollination applications, lead to an increased transport volume of live insect stock. At release sites, concerns surrounding imported insects can be reduced by using local genotypes that have been mass-produced elsewhere. Remaining plausible concerns are likely to be centred on human factors (vector behaviour or capacity) and ecological factors (interacting species) and should be anticipated in the design of communication materials. Well-designed, locally relevant communication and engagement material is an important part of programme success. Stakeholder engagement is thus critical to reducing risks of perceived and plausible concerns affecting programme outcomes in an increasingly electronically connected world. Experience at release sites can help inform the design of accessible information useful at all stages of the transportation pathway. For transnationally transported insects, providing such information to specific stakeholders (e.g. courier companies and border authorities) will reduce the likelihood of delays, which can, in turn, affect the quality and mortality of the transported insects.

Single nucleotide polymorphism based assessment of genetic diversity in local and exotic onion genotypes.

Onion is an economically important vegetable cultivated worldwide on a large scale. Liberal exchange of germplasm and frequent selection caused narrow genetic diversity in most crops, including onion. Thus, it is essential to estimate and understand genetic diversity before launching of any breeding program. The current study was conducted to explore genetic diversity among 39 short-day onion genotypes (indigenous and exotic). All the genotypes were evaluated for various phenotypic traits by using single nucleotide polymorphism (SNP) genotyping based on KASPar assays. Principal component analysis (PCA) was performed to determine the variability among genotypes. The four principal components with eigenvalue greater than 1 accounted for 67.5656% variability for quantitative traits, whereas first five principal components with eigenvalue greater than 0.7 accounted for 86.24% variation among the genotypes for qualitative traits. The principal component analysis identified diverse traits including bulb weight, bulb diameter, plant height, number of survived plants and vitamin C. These traits were further analyzed through ANOVA (Analysis of Variance) following augmented block design to describe genotypic variability for selected traits. Onion genotypes showed significant variation for bulb weight, bulb diameter and Vitamin C. Genotypic clustering based on PCA showed that 15 indigenous genotypes were clustered with exotic genotypes (14) while remaining indigenous genotypes (10) were distant. A total of 30 SNPs were used for assessment of genetic diversity out of these, 24 SNPs were detected with polymorphic loci (0.8%, heterozygosity), while only six markers were with monomorphic sites (0.2% heterozygosity). Subsequently, population structure analysis revealed three different populations indicating significant variability. Conclusively, a significant similarity between exotic and a group of indigenous genotypes indicates direct adoption of exotic genotypes or their sister lines. A further broadening of the genetic base is required and could be done by crossing distant genotypes.

Genetic diversity of norovirus associated with outbreaks in school children with acute gastroenteritis in Changzhou, China, 2018-2019.

Norovirus is one of the major causes of outbreaks and sporadic cases of acute gastroenteritis in school children. Obtaining local genotype diversity information regarding norovirus is important for developing and evaluating prevention strategies of the transmission of this virus in school children. Clinical specimens, obtained from the routine acute gastroenteritis surveillance network from 2018 to 2019, were primarily tested using commercial real-time PCR Kit. Samples with Ct value less than 25 were selected and used for complete genome sequencing and those with Ct value between 25 and 30 were selected and used for he partial VP1 and RdRp regions sequencing. Phylogenetic trees of the viral genome were constructed by using the neighbor-joining method with bootstrap analysis of 1000 replicates in MEGA 6.0. Epidemiological surveillance of acute intestinal infections (n = 384) showed high-level detection (73.18%) of human norovirus in school endemic acute gastroenteritis events in Changzhou, with obvious epidemic characteristics in autumn and winter. Through genotyping, it was found that 93.12% of norovirus were GII, including GII.2, GII.3, GII.4, GII.6, GII.7, and GII.17. By October 2019, two norovirus genotypes, GII.4[P31] and GII.17[P17], became the preponderant epidemic strains. Phylogenetic analysis of the new GII.17[P17] complete genomes showed close relationship with Miyagi strain identified in Japan in 2015, and GII.4[P31] showed close relationship with Jinan strain indentified in China in 2017. The study highlights the emerging role of GII.4[P31] and GII.17[P17] in causing endemic acute gastroenteritis outbreaks at school children, in Changzhou, China in 2019.

Spatiotemporal changes in greenhouse gas emissions and soil organic carbon sequestration for major cropping systems across China and their drivers over the past two decades

Chinese agricultural systems have experienced dramatic changes in crop planting area, cropping system, irrigation and fertilization managements, and crop yields in recent decades. These changes can substantially affect greenhouse gases (GHG) emissions and soil organic carbon (SOC) sequestration in croplands. However, the spatiotemporal patterns, as well as their driving factors and mechanisms, have not been well understood. Here, the Denitrification-Decomposition model is calibrated and validated to estimate nitrous oxide (N2O) and methane (CH4) emissions and SOC sequestration for seven major cropping systems in China during 2001–2020. The Logarithmic Mean Divisia Index method is further applied to attribute the net GHG emissions (NGEs) trend to various drivers. The results show that the total N2O emissions, CH4 emissions, and SOC sequestration were approximately 23.7, 182.0, and 177.6 Tg CO2-eq/year in the croplands across China. The national average NGEs per unit area ranged from −8705 to 8431 kg CO2-eq ha−1 year−1 across the major cropping systems. During 2001–2020, the trend in national annual NGEs was 0.66 kg CO2-eq ha−1 year−2, ranging from −78.9 to 82.2 kg CO2-eq ha−1 year−2 across the major cropping systems. The paddy lands were mainly a carbon source due to the large amount of CH4 emissions while the uplands could be a carbon sink owing to SOC sequestration. As a whole, the cropland in China was a carbon source with the NGEs equal to 28.4 Tg CO2-eq/year, and the NGEs increased by 0.047 Tg CO2-eq/year2 in the past 20 years. Nationally, changes in crop planting area and yields reduced the NGEs whereas changes in nitrogen use efficiency and cropping systems increased them, although the major factors and their impacts varied greatly among regions. Optimizing cropping systems and nitrogen fertilization based on the local genotype, environment and management should be the most effective method to reduce the NGEs in croplands.

A Nutritional Survey of Local Barley Populations Based on the Mineral Bioavailability, Fatty Acid Profile, and Geographic Distribution of Fusarium Species and the Mycotoxin Zearalenone (ZEN)

Knowledge about the extent of nutrient variability in local barley germplasm is an important prerequisite for efficient crop improvement. The present study is one of the first to assess the potential of Tunisian barley populations (named Testour, Gergis, and Enfidha) as sources of desirable traits for barley improvement and for the prevalence of Fusarium species and the mytoxin zearalenone (ZEN). Analysis of variance revealed highly significant differences between barley populations for nutrients density. The lowest phytate/zinc molar ratios were observed in Testour and Enfidha populations with 7.23 and 9.97, respectively. However, the bioavailability of iron of most barley populations (95.4%) was inhibited mainly by the high phytate content. Oleic acid (15.2–18.7%), linoleic acid (13.8–16.01%), and palmitoleic acid (4.7–14.2%) were identified as predominant fatty acid constituents in all three barley populations. Based on morphologic and molecular characterization, Fusarium graminearum and Fusarium culmorum were the predominant species that infected Testour, Gergis, and Enfidha populations. The concentration of zearalenone ranged between 0 and 140 µg kg−1. The highest levels of zearalenone, 92 μg kg−1 and 60 μg kg−1, were detected in Testour populations that were infected with F. graminearum and F. culmorum, respectively. These relatively low amounts of zearalenone in barley populations can be attributed to the Tunisian climate and the resistance of local genotypes. Testour and Enfidha barley populations could potentially be used to improve breeding programs for biofortification.

Cultivation of Local Popcorn Genotypes as a Second Crop in Kahramanmaras Conditions

Popcorn is a snack plant with widespread consumption in our country and around the world. Although the increasing commercialization rate in agriculture with the spread of hybrid varieties has narrowed the production area of local plant species, the production of local pop corn varieties still continue today. Therefore, in this study, 17 local popcorn genotypes and 3 commercial popcorn cultivars were grown as the second crop in Kahramanmaraş climatic conditions. In the study, local popcorn genotypes were determined by plant height, first ear height, first node diameter, ear length, ear diameter, the row number of ear, the number of grain on the ear row, number of ears per plant, and ear tassel-out time, ear silk-out time, grain yield per decare and the relationships between these properties were investigated. According to the results of the research, the plant height of the local popcorn populations was 216 - 166 cm, the height of the first ear 107 -63 cm, the diameter of the first node 22.6 - 16.7 mm, the diameter of the node of ear 16.4 -11.8 mm, ear length 17.267 – 12.833 cm, ear diameter 32.513 – 26.120 mm, the row number of ear 16.8 -12.26, the number of grain on the ear row 38.86 -26.33, the number of ears per plant 1.8 -12 pieces, ear silk-out time 56 -48 days, the ear tassel-out time 68 -56 days and grain yield per decare 478 -260 kg da-1. In the study, positive correlations were found between first ear height and plant height, ear length and ear diameter, the number of grain on the ear row and ear length, the ear tassel-out time and grain yield per decare, ear silk-out time and first node diameter, ear silk-out time and the ear tassel-out time.

Backcrossing of BC3F2 Accession with Local Parents of Rice Plants which Resistance to Submergence Stress

The aims of this research was to know the introgression of Sub1 gene in BC4F1 which was backcrossed between BC3F2 with local parents. This reseach has been conducted in Green house of Agro Techno Park (ATC) and soaking tub at Sriwijaya University, Indralaya Ogan Ilir District. This research was conducted from September 2020 to March 2021. Rice seed of BC3F2 accessions of Pegagan and BC3F2 accessions of Pelita Rampak as male parents and two local genotypes of Pegagan and Pelita Rampak as female parents were used in this study. The methode being used during the research was backcrossing of local genotypes and accessions of BC3F2 to get accessions of BC4F1. Submergence tolerance was conducted during vegetative phase. The parameter being observed included percentage of crossing methods and number of rice seeds after backcrossing. While other parameters being obserbed included plant height, leaves Greenest, dry weight and growth analysis. The results showed that crossing between local genotyes and accession of BC3F2 showed that genotype of pelita rampak showed better growth after submergence indicated by better plant height, leaves greenest and growth analysis.

Yield potentiality and photosynthetic parameters of some local and exotic elite rice genotypes

Yield potentiality and photosynthetic parameters of some local and exotic elite rice genotypes

Morphological and Agronomic Variability between Seven Local Cowpea Genotypes in Acre, Brazil

Local varieties of cowpea are promising for breeding programs, as they harbor an important source of genetic variability. The objective of this study was to estimate the genetic variability among cowpea genotypes based on morphological and agronomic descriptors. The experiment was carried out in a randomized complete block design with three replications in the experimental field at Universidade Federal do Acre, in Rio Branco, Acre, Brazil. The experimental unit consisted of six lines of 5.0 m, with a spacing of 0.80 m x 0.50 m, with the four central lines used in the evaluations of 21 characters. The treatments consisted of seven local cowpea genotypes. The Mahalanobis generalized distances (D2) were calculated and used in the Tocher and UPGMA clusters. Principal component analysis, relative contribution of traits and analysis of variance were also performed. Manteiguinha and Mudubim de Rama were the most dissimilar genotypes, while Ceará Mercado and Baiano were the most similar. The main component of greater explanation illustrated the separation of genotypes into two groups, with the union between Manteiguinha and Manteigão forming one group and the other genotypes forming the other group. The traits grain yield, number of grains per pod and grain mass of fifty pods were the main determinants in the quantification of genetic divergence. The combination of the Manteiguinha with Mudubim de Rama genotypes is the most suitable for obtaining promising segregating populations.

Relationship Between Volatile Sulfur Compounds, Mineral Content, Morphological and Molecular Characterization Of Local Garlic Genotypes

This study was conducted to determine the relationship between local garlic genotypes and Taskopru garlic, cultivated in Turkey, by using volatile sulfur compounds, mineral content, molecular and morphological characterizations. Results indicated that morphological features, mineral content and volatile sulfur compounds exhibited a great diversity among the garlic genotypes. Jaccard's similarity matrix prepared using 13 SSR markers also revealed the genetic diversity among genotypes. This genetic diversity may contribute significantly to the development of new garlic cultivars. Mineral content of the garlic leaves could be used as chemotaxonomic tool for classification of the local garlic genotypes. Bangladesh J. Bot. 51(1): 147-155, 2022 (March)

Combining ability and heterosis in Sorgum (Sorghum bicolor L.)

For the sustainable improvement of sorghum (Sorghum bicolor L.), local genotypes were conventionally crossed in East Java, Indonesia to determine a) the crossing success of different genotypes, b) germination percentage and seed setting traits, and c) the combining ability and heterotic effect of sorghum parental genotypes and their F1 diallel hybrids. Three sorghum genotypes (‘Lamongan-1’, ‘Tulungagung-2’, and ‘Jombang’) from the local germplasm were collected from various regions in East Java, Indonesia, and were crossed in a complete diallel design. The experiment was carried out in a randomized complete block design with four replications during 2018–2019 at the Agrotechnology Laboratory, Faculty of Agriculture, University of Muhammadiyah, Malang, Indonesia. Results showed that the parental genotypes and their F1 hybrids exhibited significant differences in seed weight and seed diameter and nonsignificant differences in germination percentage and seed setting. The parental genotype ‘Tulungagung-2’ and its hybrids ‘Jombang’ × ‘Tulungagung-2’, ‘Tulungagung-2’ × ‘Lamongan-1’, and ‘Jombang’ × ‘Tulungagung-2’ presented the highest germination percentages, seed setting, seed weights, and seed diameters. The genotype ‘Tulungagung-2’ had the highest general combining ability and was identified as a good general paternal and maternal parent for the production of promising F1 hybrids. The hybrid ‘Jombang’ × ‘Lamongan-1’ had the highest specific combining ability for all of the characters and was recognized as a promising F1 hybrid for improving sorghum yield. Cluster analysis divided all of the parental genotypes and their F1 hybrids into two large groups with a similarity of 13.13%.

Molecular Genetic Diversity and Combining Ability for Some Physiological and Agronomic Traits in Rice under Well-Watered and Water-Deficit Conditions.

Water deficit is a pivotal abiotic stress that detrimentally constrains rice growth and production. Thereupon, the development of high-yielding and drought-tolerant rice genotypes is imperative in order to sustain rice production and ensure global food security. The present study aimed to evaluate diverse exotic and local parental rice genotypes and their corresponding cross combinations under water-deficit versus well-watered conditions, determining general and specific combining ability effects, heterosis, and the gene action controlling important traits through half-diallel analysis. In addition, the research aimed to assess parental genetic distance (GD) employing simple sequence repeat (SSR) markers, and to determine its association with hybrid performance, heterosis, and specific combining ability (SCA) effects. Six diverse rice genotypes (exotic and local) and their 15 F1 hybrids were assessed for two years under water-deficit and well-watered conditions. The results revealed that water-deficit stress substantially declined days to heading, plant height, chlorophyll content, relative water content, grain yield, and yield attributes. Contrarily, leaf rolling and the sterility percentage were considerably increased compared to well-watered conditions. Genotypes differed significantly for all the studied characteristics under water-deficit and well-watered conditions. Both additive and non-additive gene actions were involved in governing the inheritance of all the studied traits; however, additive gene action was predominant for most traits. The parental genotypes P1 and P2 were identified as excellent combiners for earliness and the breeding of short stature genotypes. Moreover, P3, P4, and P6 were identified as excellent combiners to increase grain yield and its attributes under water-deficit conditions. The hybrid combinations; P1 × P4, P2 × P5, P3 × P4, and P4 × P6 were found to be good specific combiners for grain yield and its contributed traits under water-deficit conditions. The parental genetic distance (GD) ranged from 0.38 to 0.89, with an average of 0.70. It showed lower association with hybrid performance, heterosis, and combining ability effects for all the studied traits. Nevertheless, SCA revealed a significant association with hybrid performance and heterosis, which suggests that SCA is a good predictor for hybrid performance and heterosis under water-deficit conditions. Strong positive relationships were identified between grain yield and each of relative water content, chlorophyll content, number of panicles/plant, number of filled grains/panicle, and 1000-grain weight. This suggests that these traits could be exploited as important indirect selection criteria for improving rice grain yield under water-deficit conditions.

Determining Some Quality Properties of Oat Genotypes Collected from the Middle and West Black Sea Region

Healthy foodstuffs, including functional foods, are the key component of a healthy and prosperous life. Oat grains are rich in protein, soluble dietary fiber, β-glucan, starch, oil, some vitamins and minerals, and thus accepted as a healthy foodstuff. This study was conducted to determine physical and chemical quality traits of many different oat landraces/cultivars. In this study, 251 local oat genotypes, collected from 10 provinces of Western and Middle Black Sea Regions of Turkey and four standard oat cultivars were grown over the experimental fields of the Agricultural Application and Research Center at Samsun Ondokuz Mayıs University for two years in an augmented experimental design. As a result of the research, the screenings percentage >2 mm ranged from 69.81 to 95.80%, thousand grain weight from 18.55 to 38.41 g, protein content from 8.82 to 14.81%, starch content from 33.15 to 51.32, β-glucan content from 2.44 to 3.93%, acid detergent fibre value from 18.1 to 18.95%, and neutral detergent fibre value from 27.83 to 36.66%. Also, the local oat genotypes exhibited significant variations in fat content (3.70–7.91%), linoleic acid content (31.89–38.37%), oleic acid content (35.03–44.77%), palmitic acid content (18.26–22.87%), and stearic acid content (1.50–1.96%). According to the biplot, it was determined that the investigated quality traits differed according to the genotypes collected from the provinces. Also, these results can be used for selection of precious pure lines and improvement of new varieties for oat breeding programs.

SELECTION OF POTATO APICAL LEAF CURL VIRUS DISEASE-RESISTANT GENOTYPES, PEST SURVEILLANCE, SEED DEGENERATION, AND MANAGEMENT OF APHID IN FIELD CONDITIONS

Objectives: Under All India Co-ordinated Research Project on Potato, studies on the selection of potato apical leaf curl virus disease-resistant genotypes, pest surveillance, seed degeneration, and management of aphid in field conditions were conducted at Hisar during 2017–2018. Methods: Sowing of seed tubers was done at recommended time and spacing in every experiment followed by spraying of required insecticides. Observations on different aspects were recorded and statistically analyzed to present results in tabular format. Results and Discussion: Out of 100 germplasm, seven were resistant and one was moderately resistant to potato apical leaf curl New Delhi virus, all the local genotypes were susceptible to disease. There was infestation of aphids, jassids, thrips, and whitefly irrespective of cultivars. Severe mosaic incidence ranged from 63.6 to 93.2%. The breeder seed was superior as it resulted in the highest seed tuber emergence (98.94%) and the least incidence of leafroll disease (0.80%) followed by seed tuber of seed plot technique (SPT). The conventional seed performed the poorest in terms of emergence and exhibited the highest disease incidence. Aphid appeared in the 47th meteorological week and it approached the ET level in the 52nd week. Whitefly population was the highest in the 47th week which continuously declined. Jassid population was very mild and thrips appeared in the 52nd week. Flonicamid 50 WG caused higher aphid mortality than imidacloprid after 24 h of spray. The maximum and minimum temperatures varied from 16.9 to 35.7 and 2.6 to 16.2° C, respectively. The morning and evening relative humidity was in the range of 82–100 and 24–75%, respectively. The wind speed ranged from 1.0 to 3.6 KMPH and the sun was shined from 0.3 to 7.6 h. The results of this study are close conformity of earlier researchers. Conclusion: It is concluded that resistant genotypes, breeder seed, and seed produced through SPT are promising in managing the disease successfully. Flonicamid is a good alternative of imidacloprid. Aphid is a major pest that plays a key role in transmitting viral disease of this crop, its population touched ET level in the 52nd week.