文献类型： 外文期刊
作者： Ahmed, Hafiz Ghulam Muhu-Din 1 ; Kashif, Muhammad 1 ; Rashid, Muhammad Abdul Rehman 1 ; Sajjad, Muhammad 4 ; Zeng, Yawen 5 ;
作者机构： 1.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad 38000, Punjab, Pakistan
2.Univ Cent Punjab, Punjab Grp Coll, Dept Bot, Bahawalpur 63100, Pakistan
3.Yunnan Acad Agr Sci, Ind Crops Res Inst, Kunming 650205, Yunnan, Peoples R China
4.COMSATS Univ Islamabad CUI, Dept Biosci, Pk Rd, Islamabad 45550, Pakistan
5.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Kunming 650205, Yunnan, Peoples R China
关键词： Genome; Wheat; Yield; Polymorphism; Molecular markers
期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）
ISSN： 1560-8530
年卷期： 2020 年 24 卷 2 期
页码：
收录情况： SCI
摘要： To determine the genetic diversity and genome wide allelic variation, a natural population of 105 bread wheat genotypes was analyzed. The 302 polymorphic SSR markers, distributed among homeologous genomes A, B and D were manipulated. A total 2308 alleles of 302 markers were observed with average density of 7.6 alleles per marker. Among the observed polymorphic alleles, 685, 869 and 754 for 102, 100 and 100 polymorphic SSR loci were belong to A, B and D genome, respectively. The maximum (0.89) polymorphic information contents (PIC) value was observed for markers Xwmc95, Xbarc95 and Xwmc399. These markers with total 15 alleles possessed the 100-320, 100-280 and 120-280 base pair genomic range at chromosomes 1A, 7B and 4D, respectively. The average PIC values ranged from 0.33 to 0.89 with a mean value of 0.68 in A-genome, while both B and D-genomes had PIC values ranged from 0.37 to 0.89 showing the averaged values 0.75 and 0.72, respectively. Gene diversity (GD) values ranged from 0.45 to 0.90 across the three A, B, and D genomes. The mean values of gene diversity were identified in B-genome (0.78) followed by D- (0.77) and A-genome (0.71), which indicated the maximum variation in B-genome and graded the three genomes as B>D>A-genome for genomic variation. The UPGMA cluster DARWIN tree and STRUCTURE analysis classified the 105 bread wheat genotypes into 4 groups or clusters. Genotypes G-31, G-32 and G-33 contained the combination of genetic makeup from the cluster 2 and cluster 3, while the genotypes G-71 and G-72 contained the genetic constitution from cluster 3 and cluster 4 which showed the origin from these clusters assuming the similar descendants. Genetic distances among clusters clearly showed the variations and genetic diversity among each of the clusters. The current experiment indicates the reliability of SSR markers that would be beneficial and robust resource for future genetic and genomic studies, as genetic map construction, comparative genomic analyses, genetic diversity and molecular marker-assisted breeding in wheat for selection of promising genotypes. (C) 2020 Friends Science Publishers
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