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Öğe Agronomical Screening of OGLE1040/TAM O-301 Oat Genetic Mapping Population(Univ Kebangsaan Malaysia, 2019) Dumlupınar, Ziya; Güngör, Hüseyin; Dokuyucu, Tevrican; Herek, Sevgi; Tekin, Ali; Akkaya, AydınIn recent years, mapping populations have provided improvements for oat genomic researches. A two-year study was conducted in East-Mediterranean conditions using Ogle1040/TAm O-301 pure-line mapping population including 136 individuals and parents. Stem diameter (SD), plant height (PH), panicle length (PL), vegetative period (VP), grain filling period (GFP), days to maturity (DM), grain number per panicle (GNP), grain weight per panicle (GwP), thousand kernel weight (TKW) and grain yield (GY) were investigated in 2014 and 2015 cropping seasons in Kahramanmaras. All the investigated traits were significantly different for years (p<0.01) and genotypes (p<0.05 and p<0.01) except SD and GNP. Genotype x year (G x Y) interaction was significant for PL, VP, GFP, DM and GY (p<0.01). In the first year, the average GY per row was 227.6 g, whilst it was 184.5 g in the second year. In terms of GY, the parents Ogle 1040 and TAM O-301 showed lower performance (154.5 and 111.5 g/row, respectively) compared to Ogle1040/TAm O-301 (OT) population average (206 g/row). OT129 genotype had the highest GY with 360 g/row. Principal component (PC) factor analysis yielded 10 PC explaining 100% of total variance in the data and the chi-square values of the PC1 to PC9 were found significant. According to PC biplot analysis, genotypes with high GY, TKW, GNP, GWP, PL and GFP were located throughout the right quadrants whereas the genotypes with high VP, DM and SD were located throughout the left quadrants. The relationships between PH x GY, GWP x GNP and GWP x TKW were positive and significant.Öğe ASSOCIATION MAPPING OF GERMINATION AND SOME EARLY SEEDLING STAGE TRAITS OF A TURKISH ORIGIN OAT COLLECTION(Soc Field Crop Sci, 2022) Koçak, Berk Abdullah; Kılınç, Fatih Mehmet; Bardak, Adem; Güngör, Hüseyin; Dokuyucu, Tevrican; Akkaya, Aydın; Dumlupınar, ZiyaIn recent years, oat plant especially for hay yield is on high demand in Turkey. In this study, 167 Turkish oat landraces were evaluated for germination and some early seedling stage traits and genotyped by 6K SNP Chip assay to detect candidate markers using association mapping analysis. The variation in oat genotypes for germination and other investigated traits was significant 5%, except for germination rate (GR). In the research, principal component (PC) 1 and PC2 value was found 41.5% and 21.5%, respectively, explaining the 63% of the total variation. According to the results of the association mapping analysis a total number of 33 candidate markers were observed, eight candidate markers for germination rate, five candidate markers for germination ratio (GP), five markers for radicle length (RL), five markers for coleoptile length (CL), four markers for plumula length (PL), and six markers for seed vigor index (VI). These candidate markers identified in the study for germination and early seedling stage traits could be used in future studies.Öğe Determination of Relationships between Grain Yield and Some Agronomic Traits by Correlation and Path Analysis in Oat (Avena spp.)(Univ Namik Kemal, 2017) Güngör, Hüseyin; Dokuyucu, Tevrican; Dumlupınar, Ziya; Akkaya, AydınGrain yield is a quantitative trait that a number of characteristics has direct or indirect effects. This research was carried out in 2008-09 growing season with 22 landraces and 3 commercial oat (Avena spp.) cultivars under Kahramanmaras ecological conditions. The research was arranged in a randomized complete block design with 3 replications. In the research, the traits such as stem diameter(SD), flag leaf length (FLL), flag leaf width (FLW), plant height (PH), panicle length (PL), grain filling period (GFP), vegetative period (VP), days to maturity (DM), biomass (B), grain number per panicle (GNP), grain weight per panicle (GWP), thousand kernel weight (TKW) and grain yield (GY) were investigated; the direct and indirect effects of those traits on grain yield were evaluated using Path and correlation analysis. According to Path analysis, GFP (47.74%), VP (39.41%), B (31.15%), GNP (29.80%) and TKW (24.78%) had the highest direct effect on grain yield. Based on correlation analysis there was a positive and significant relationship between grain yield and stem diameter (r = 0.480**), flag leaf length (r = 0.230*), flag leaf width (r = 0.241*), grain filling period (r = 0.224*), days to maturity (r = 0.339**) and biomass (r = 0.313**) while a negative and significant correlation found with plant height (r = -0.315**). In the study, Path analysis and correlation coefficients used to determine direct and indirect effects of some agronomic traits on grain yield showed that GFP, VP, B, GNP and GWP might be used as a selection criteria for grain yield successfully.Öğe Geographical description and molecular characterization of genetic structure and diversity using a 6K SNP array in Turkish oat germplasm(Canadian Science Publishing, Nrc Research Press, 2019) Cömertpay, Gönül; Habyarimana, Ephrem; Baloch, Faheem Shehzad; Güngör, Hüseyin; Dokuyucu, Tevrican; Akkaya, Aydın; Dumlupınar, ZiyaCultivated oat (Avena sativa L. and Avena byzantina Koch) is native to Turkey, a secondary center of oat diversity. Oat breeding has received less attention relative to other cereals. In this work, the diversity of oat landraces collected from different regions of Turkey as well as obtained from different gene banks was investigated using 3293 high quality SNP markers. Expected heterozygosity (Hs), observed heterozygosity (Ho), inbreeding coefficient (Fis), and overall genetic diversity (Ht) of the oat gene pool were 0.22, 0.01, 0.96, and 0.38, respectively. The value of the genetic differentiation (Fst) metric for genetic structure was 0.41 and indicated that kinship was more of a determinant for population structure than the geographical provenance. The populations from different geographical regions shared a great proportion of genetic diversity. Clustering using model-based STRUCTURE, principal coordinates (PCoA), and neighbour-joining (NJ) algorithms were mostly comparable except for five discrepantly clustered accessions in NJ and PCoA relative to STRUCTURE, which can be attributed to the relatively reduced resolution power in the NJ and PCoA approaches. SNP markers partitioned all oat accessions into four main groups (A, B, C, and D) with 10 unclassified accessions. Some landraces were identical based on genetic distance and can represent duplications in gene banks. The data presented in this work represent the initial results on genetic diversity as investigated in Turkish oat, and are an important resource for systematicians, geneticists, and breeders interested in Turkish oat germplasm. These results are expected to open new opportunities for further studies in oat genomics and cultivar development.Öğe Yulafta (Avena spp.) Tane Verimi ile Bazı Tarımsal Özellikler Arasındaki İlişkilerin Korelasyon ve Path Analizleriyle Saptanması(2017) Güngör, Hüseyin; Dokuyucu, Tevrican; Dumlupınar, Ziya; Akkaya, AydınTane verimi bir çok özelliğin doğrudan veya dolaylı olarak etkilediği kantitatif bir özelliktir. Bu araştırma, Kahramanmaraş ekolojik koşullarında 2008-2009 yetiştirme döneminde 22 yerel ve 3 ticari yulaf (Avena spp.) çeşidi kullanılarak yürütülmüştür. Deneme, tesadüf blokları deneme desenine göre 3 tekerrürlü olarak kurulmuştur. Çalışmada, sap kalınlığı (SK), bayrak yaprak uzunluğu (BYU), bayrak yaprak eni (BYE), bitki boyu (BB), salkım uzunluğu (SU), vejetatif periyod (VP), tane dolum periyodu (TDP), ekim-olgunlaşma süresi (EOS), biyomas (B), salkımdaki tane sayısı (STS), salkımdaki tane ağırlığı (STA), bin tane ağırlığı (BTA) gibi bazı tarımsal özellikler incelenmiş; ayrıca, bunların tane verimi (TV)'ne olan doğrudan ve dolaylı etkileri path ve korelasyon analizleriyle irdelenmiştir. Path analizleri sonucuna göre; TV'ye en yüksek doğrudan etkiyi TDP (% 47.74), VP (% 39.41), B (% 31.15), STS (% 29.80) ve BTA (% 24.78) yapmıştır. Korelasyon analizine göre; TV ile sap kalınlığı (r 0.480**), bayrak yaprak uzunluğu (r 0.230*), bayrak yaprak eni (r 0.241*), tane dolum periyodu (r 0.224*), ekim-olgunlaşma süresi (r 0.339**) ve biyomas (r 0.313**) arasında pozitif ve önemli bir ilişki, bitki boyu (r -0.315**) arasında ise negatif ve önemli bir ilişkinin olduğu saptanmıştır. Bu çalışma ile Path analizi ve korelasyon katsayıları kullanılarak verim ve bazı tarımsal özelliklerin doğrudan ve dolaylı ilişkileri değerlendirilmiş ve Kahramanmaraş koşullarında yapılacak yulaf ıslah çalışmalarında, TDP, VP, B, STS ve STA'nın tane verimi için yapılacak seleksiyonlarda başarılı bir şekilde kullanılabileceği sonucuna varılmıştır.
