关键词:河南省; 小麦品种; 遗传多样性; SNP Genetic Diversity of Registered Wheat Varieties in Henan Province Based on Pedigree and Single-Nucleotide Polymorphism CAO Ting-Jie1,2, XIE Jing-Zhong1, WU Qiu-Hong1, CHEN Yong-Xing1, WANG Zhen-Zhong1, ZHAO Hong2, WANG Xi-Cheng2, ZHAN Ke-Hui3, XU Ru-Qiang4, WANG Ji-Rui5, LUO Ming-Cheng6, LIU Zhi-Yong1,* 1 Department of Plant Genetics & Breeding, China Agricultural University, Beijing 100193, China
2 Wheat Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
3Henan Agricultural University, Zhengzhou 450002, China
4 School of Life Science, Zhengzhou University, Zhengzhou 450001, China
5 Wheat Research Institute, Sichuan Agricultural University, Chengdu 611130, China
6University of California at Davis, Davis, CA 95616, USA
AbstractTo understand the genetic diversity of wheat varieties in Henan Province at whole genome level, we selected 96 registered wheat varieties in the past decade for SNP genotyping using the Illumina 90k iSelect SNP chip. The results showed that 47.39% of the SNPs (38 661 out of 81 587) were polymorphism between varieties. The genome distribution of polymorphic SNPs showed a tendency of B > A > D. The genetic similarity of the 96 varieties ranged from 0.552 to 0.998 with an average value of 0.719. However, genetic similarity of 0.652 to 0.812 was found for 94.3% of the tested varieties, indicating highly similarity for most of the varieties in Henan province. The 96 wheat varieties could be classified as seven groups by UPGMA analyses. Based on pedigree and SNP analyses, very narrow genetic background was observed for the registered varieties in the past decade in Henan province. It is an urgent task for wheat breeders to explore and introduce diversified germplasm resources into wheat breeding program to increase the yield potential and stress tolerance in the future.
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