Association mapping of quantitative trait loci for yield-related agronomic traits in rice (Oryza sativa L.)

XU Fei-fei; JIN Liang; HUANG Yan; TONG Chuan; CHEN Ya-ling; BAO Jin-song

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Association mapping of quantitative trait loci for yield-related agronomic traits in rice (Oryza sativa L.)

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High yield in rice mainly depends on large grain weight, ideal plant architecture and proper lfowering time adapting to various geographic regions. To help achieve higher yield, phenotype variations of heading date (HD), plant architecture and grain shape in a panel of 416 rice accessions were investigated in this study. A total of 143 markers including 100 simple sequence repeat (SSR) markers and 43 gene-tagged markers were employed in association mapping to detect quantitative trait loci (QTL) responsible for these variations. Among the 7 subpopulations, POP5 injaponica group showed the largest values of HD and grain width (GW), but the smalest values of grain length (GL) and grain length to width ratio (GLW). Among the sixindicagroups, POP7 had the largest values of HD, GL, GLW, and 1000-grain weight (TGW). A total of 27 QTLs were detected underlying these phenotypic variations in single year, while 12 of them could be detected in 2006 and 2007.GS3 marker was closely associated with GL, GW and GLW, and widely distributed in different groups. The starch synthesis related gene markers, SSI, SSIIa, SBE1, AGPL4, and ISA1, were linked to plant height (PH), panicle length (PL), lfag leaf length (FLL), GW, and GLW. The SSR markers, RM267, RM340 and RM346, were linked to at least two traits. Therefore, these new markers wil probably be used to improve rice grain yield or plant architecture when performing marker-assisted selection of proper aleles.

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《农业科学学报（英文版）》 |2016年第10期|2192-2202|共11页
作者
XU Fei-fei; JIN Liang; HUANG Yan; TONG Chuan; CHEN Ya-ling; BAO Jin-song;
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Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, P.R.China;

Research & Development Centre of Flower, Zhejiang Academy of Agricultural Sciences, Hangzhou 311202, P.R.China;

Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, P.R.China;

Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, P.R.China;

Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, P.R.China;

Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, P.R.China;

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Association mapping of quantitative trait loci for yield-related agronomic traits in rice (Oryza sativa L.)

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