Genetic variability of Brazilian wheat germplasm obtained by high-density SNP genotyping

被引：9
|
作者：
Scherlosky, Adriana [1 ]
Marchioro, Volmir Sergio [2 ]
Franco, Francisco de Assis [3 ]
Braccini, Alessandro Lucca [1 ]
Schuster, Ivan [4 ]
机构：
[1] Univ Estadual Maringa, Dept Agron, BR-87020900 Maringa, Parana, Brazil
[2] Univ Fed Santa Maria, BR-98400000 Frederico Westphalen, RS, Brazil
[3] Coodetec, BR-85813450 Cascavel, PR, Brazil
[4] Longping High Tech, BR-14140000 Cravinhos, SP, Brazil
来源：
CROP BREEDING AND APPLIED BIOTECHNOLOGY | 2018年 / 18卷 / 04期
关键词：
Triticum aestivum (L.); genetic variability; genotypes from different eras; breeding; DIVERSITY; CULTIVARS;
D O I：
10.1590/1984-70332018v18n4a59
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The aim of this study was to evaluate the genetic diversity of the wheat germplasm using high-density genotyping with SNP markers. A set of 211 wheat varieties genotyped with 35,142 SNP markers were used in the experiment. Genetic distances ranged from 0.013 to 0.471, with the highest frequency of distances varying between 0.31 and 0.40. In the cluster analysis by the UPGMA method, 81% of the varieties were clustered in three groups. Genetic variability in the Brazilian wheat germplasm has remained constant for over 70 years. Mean genetic distances among the varieties developed in each decade ranged from 0.33 to 0.34. A trend of genetic distance between genotypes from different eras has been observed over time as a result of breeding. Results described in this study can help Brazilian wheat breeders to manage more adequately genetic variability in the Brazilian wheat germplasm.
引用
收藏
页码：399 / 408
页数：10
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