The iSelect 9 K SNP analysis revealed polyploidization induced revolutionary changes and intense human selection causing strong haplotype blocks in wheat

被引：39

作者：

Hao, Chenyang ^{[1
]}

Wang, Yuquan ^{[1
]}

Chao, Shiaoman ^{[2
]}

Li, Tian ^{[1
]}

Liu, Hongxia ^{[1
]}

Wang, Lanfen ^{[1
]}

Zhang, Xueyong ^{[1
]}

机构：

[1] Chinese Acad Agr Sci, Minist Agr,Inst Crop Sci, Key Lab Crop Gene Resources & Germplasm Enhancmen, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China

[2] USDA ARS, Biosci Res Lab, Fargo, ND 58102 USA

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

LINEAR UNBIASED PREDICTION; SPATIAL GENETIC-STRUCTURE; DOMESTICATION; EVOLUTION; PATTERNS; YIELD; IMPROVEMENT; DIVERSITY; DISCOVERY; SOFTWARE;

D O I：

10.1038/srep41247

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A Chinese wheat mini core collection was genotyped using the wheat 9 K iSelect SNP array. Total 2420 and 2396 polymorphic SNPs were detected on the A and the B genome chromosomes, which formed 878 haplotype blocks. There were more blocks in the B genome, but the average block size was significantly (P < 0.05) smaller than those in the A genome. Intense selection (domestication and breeding) had a stronger effect on the A than on the B genome chromosomes. Based on the genetic pedigrees, many blocks can be traced back to a well-known Strampelli cross, which was made one century ago. Furthermore, polyploidization of wheat (both tetraploidization and hexaploidization) induced revolutionary changes in both the A and the B genomes, with a greater increase of gene diversity compared to their diploid ancestors. Modern breeding has dramatically increased diversity in the gene coding regions, though obvious blocks were formed on most of the chromosomes in both tetraploid and hexaploid wheats. Tag-SNP markers identified in this study can be used for marker assisted selection using haplotype blocks as a wheat breeding strategy. This strategy can also be employed to facilitate genome selection in other self-pollinating crop species.

引用

页数：13

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