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  • Küçük Resim
    Öğe
    Genetic Diversity and Population Structure in Bread Wheat Germplasm from Turkiye Using iPBS-Retrotransposons-Based Markers
    (MDPI, 2023) Haliloğlu, Kamil; Türkoğlu, Aras; Öztürk, Ali; Niedbala, Gniewko; Niazian, Mohsen; Wojciechowski, Tomasz; Piekutowska, Magdalena
    This study investigated the genetic diversity and population structure of 63 genotypes from Turkish bread wheat germplasm using iPBS-retrotransposons primers. The thirty-four iPBS primers produced a total of 1231 polymorphic bands, ranging from 8 (iPBS-2375) to 60 (iPBS-2381) alleles per marker, with an average number of 36.00 alleles. The polymorphism information content (PIC) per marker varied between 0.048 (iPBS 2087) and 0.303 (iPBS 2382), with an average of 0.175. The numbers of effective alleles (ne), genetic diversity of Nei (h), and Shannon's information index (I) value were calculated as 1.157, 0.95, and 0.144, respectively. The greatest genetic distance (0.164) was between Eastern Anatolia Agricultural Research Institute genotypes and cukurova Agricultural Research Institute genotypes. The unweighted pair-group method with arithmetic mean (UPGMA) dendrogram placed the 63 wheat genotypes into three clusters. The percentage of genetic diversity explained by each of the three main coordinates of the basic coordinate analysis was determined to be 44.58, 12.08, and 3.44, respectively. AMOVA (Analysis of Molecular Variance) showed that the variation within populations was 99% and that between populations was 1%. The result of genetic structure analysis suggests that the greatest value of K was calculated as 3. The F-statistic (Fst) value was determined as 0.4005, 0.2374, and 0.3773 in the first to third subpopulations, respectively. Likewise, the expected heterozygosity values (He) were determined as 0.2203, 0.2599, and 0.2155 in the first, second, and third subpopulations, respectively. According to the information obtained in the study, the most genetically distant genotypes were the G1 (Aksel 2000) and G63 (Karasu 90) genotypes. This study provided a deep insight into genetic variations in Turkish bread wheat germplasm using the iPBS-retrotransposons marker system.
  • Küçük Resim
    Öğe
    Isı üreten içi dolu kompozit bir silindirde malzeme özelliklerinin elastik-plastik deformasyona etkisi
    (2013) Öztürk, Ali; Gülgeç, Müfit
    Tresca akma kriteri ve birleşik akış kuralına dayanarak, iki ucu sabit, ortasından ısıtılan kompozit bir silindirin elastik-plastik deformasyonu, sadece geometrik parametrelerin etkisi değil aynı zamanda akma dayanımı, elastisite modülü, Poisson oranı, ısıl iletkenlik ve ısıl genleşme katsayıları gibi malzeme özelliklerinin de etkisi dikkate alınarak incelenmiştir. Çalışmada, elastik-mükemmel plastik malzemeden yapılmış bu kompozit silindirdeki gerilme, gerinim ve deplasman dağılımları elde edilmiştir. İçteki silindirde artan ısı üretimine göre değişen gerilme dağılımı ve plastik bölgelerin gelişimi grafiklerle gösterilmiştir.