Genetic Diversity and Breeding Signatures for Regional Indica Rice Improvement in Guangdong of Southern China
文献类型： 外文期刊
作者： Yu, Hang 1 ; Liu, Yue 1 ; Sun, Bingrui 1 ; Liu, Qing 1 ; Mao, Xingxue 1 ; Jiang, Liqun 1 ; Lyu, Shuwei 1 ; Zhang, Jing 1 ; Chen, Pingli 1 ; Pan, Dajian 1 ; Chen, Wenfeng 1 ; Fan, Zhilan 1 ; Li, Chen 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China
2.Minist Agr & Rural Affairs, Coconstruct Minist & Prov, Key Lab Genet & Breeding High Qual Rice Southern C, Guangzhou 510640, Peoples R China
3.Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China
4.Guangdong Rice Engn Lab, Guangzhou 510640, Peoples R China
关键词： Rice; Yield improvement; Resequencing; Breeding signature; GWAS
期刊名称：RICE （ 影响因子：5.5； 五年影响因子：5.8 ）
ISSN： 1939-8425
年卷期： 2023 年 16 卷 1 期
页码：
收录情况： SCI
摘要： As the pioneer of the Green Revolution in China, Guangdong province witnessed the improvement and spread of semi-dwarf Xian/Indica rice cultivars and possessed diverse rice germplasm of landrace and cultivars. A total of 517 accessions containing a core germplasm of 479 newly sequenced landraces and modern cultivars were used to reveal breeding signatures and key variations for regional genetic improvement of indica rice from Guangdong. Four subpopulations were identified in the collection, which including Ind IV as a novel subpopulation that not covered by previously released accessions. Modern cultivars of subpopulation Ind II were inferred to have less deleterious variations, especially in yield related genes. About 15 Mb genomic segments were identified as potential breeding signatures by cross-population likelihood method (XP-CLR) of modern cultivars and landraces. The selected regions spanning multiple yield related QTLs (quantitative trait locus) which identified by GWAS (genome-wide association studies) of the same population, and specific variations that fixed in modern cultivars of Ind II were characterized. This study highlights genetic differences between traditional landraces and modern cultivars, which revealed the potential molecular basis of regional genetic improvement for Guangdong indica rice from southern China.
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