PJB-2019-70
A neo-diversity group of Oryza sativa L. ssp. Japonica in northeastern China evaluated by large-effect SNPs
Hong Gao, Quan Xu, Ming Zhong, Zhengjin Xu and Guomin Sui
Abstract
Rice breeding on the subspecies Oryza sativa L. ssp. japonica in northeastern China has been successful over a relatively short time. However, little is known about how the genetic structure of japonica has diverged as a result of artificial selection. In the present study, 189 single nucleotide polymorphisms (SNP) markers from gene coding regions were selected to characterize the diversity, phylogeny and population structure of four breeding groups in northeastern China, viz. modern japonica, historical japonica, exotic japonica, and indica varieties. Results suggested that the neo-diversity of japonica has formed gradually through introgression from other gene resources during the breeding selection. The genetic diversity (π) of modern japonica was lowest compared with historical japonica, exotic japonica and indica varieties, which implies a genetic bottleneck caused by the breeding selection. Population structure and phylogeny analysis proved that the modern japonica was independent of the historical japonica and exotic japonica groups
To Cite this article:
Gao, H., Q. Xu, M. Zhong, Z. Xu and G. Sui. 2019. A neo-diversity group of Oryza sativa L. ssp. Japonica has formed in northeastern China evaluated by large-effect SNPs. Pak. J. Bot., 51(2): DOI: http://dx.doi.org/10.30848/PJB2019-2(24)
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