Association analysis of physicochemical traits on eating quality in rice (Oryza sativa L.)
文献类型: 外文期刊
第一作者: Zhao, Wei-Guo
作者: Zhao, Wei-Guo;Kwon, Soon-Wook;Park, Yong-Jin;Zhao, Wei-Guo;Chung, Jong-Wook;Ma, Kyung-Ho;Kwon, Soon-Wook;Park, Yong-Jin;Lee, Jeong-Heui
作者机构:
关键词: Rice;Association mapping (AM);Linkage disequilibrium (LD);Population structure;Eating quality
期刊名称:EUPHYTICA ( 影响因子:1.895; 五年影响因子:2.181 )
ISSN: 0014-2336
年卷期: 2013 年 191 卷 1 期
页码:
收录情况: SCI
摘要: Improvement of rice eating quality is an important objective in current breeding programs. In this study, 130 rice accessions of diverse origin were genotyped using 170 SSR markers to identify marker-trait associations with physicochemical traits on eating quality. Analysis of population structure revealed four subgroups in the population. Linkage disequilibrium (LD) patterns and distributions are of fundamental importance for genome-wide mapping associations. The mean r (2) value for all intrachromosomal loci pairs was 0.0940. LD between linked markers decreased with distance. Marker-trait associations were investigated using the unified mixed-model approach, considering both population structure (Q) and kinship (K). In total, 101 marker-trait associations (p < 0.05) were identified using 52 different SSR markers covering 12 chromosomes. The results suggest that association mapping in rice is a viable alternative to quantitative trait loci mapping, and detection of new marker-trait associations associated with rice eating quality will also provide important information for marker-assisted breeding and functional analysis of rice grain quality.
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