Patterns of genomic variation in Chinese maize inbred lines and implications for genetic improvement

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Renyu ZhangXiaohong Yang

Abstract

Genetic relationships among Chinese maize germplasms reveal historical trends in heterotic patterns from Chinese breeding programs and identify line Dan340 as a potential genome donor for elite inbred line Zheng58. The characterization of the genetic relationships, heterotic patterns and breeding history of lines in maize breeding programs allows breeders to efficiently use maize germplasm for line improvement over time. In this study, 269 temperate inbred lines, most of which have been widely used in Chinese maize breeding programs since the 1970s, were genotyped using the Illumina MaizeSNP50 BeadChip, which contains 56,110 single-nucleotide polymorphisms. The STRUCTURE analysis, cluster analysis and principal coordinate analysis results consistently revealed seven groups, of which five were consistent with known heterotic groups within the Chinese maize germplasm-Domestic Reid, Lancaster, Zi330, Tang SPT and Tem-tropic I (also known as "P"). These genetic relationships also allowed us to determine the historical trends in heterotic patterns during the three decades from 1970 to 2000, represented by Mo17 from Lancaster, HuangZaoSi (HZS) from Tang SPT, Ye478 from Domestic Reid and P178 from Tem-tropic I heterotic groups. Mo17-r...Continue Reading

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Citations

Apr 29, 2020·Nature Genetics·Baobao WangHaiyang Wang
Oct 12, 2021·Frontiers in Plant Science·Jianzhong WuJianfeng Weng

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Datasets Mentioned

BETA
ZhengDan958

Methods Mentioned

BETA
genetic modification
genotyping

Software Mentioned

VCFtools
UPGMA
MEGA
PLINK
R R Core
Syngenta
CLUMPP
R Core Team
PowerMarker
STRUCTURE

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