Research Paper

New Stably Expressed Loci Responsible for Panicle Angle Trait in Japonica Rice in Four Environments

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  • 1State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China; 2Shanghai Academy of Agricultural Sciences, Shanghai 201106, China

Online published: 2013-01-30

Supported by

The study was supported by the Program of National High Technology Research and Development, Ministry of Science and Technology, China (Grant No. 2010AA101301), the Program of Introducing Inter- national Advanced Agricultural Science and Technology in China (Grant No. 2006-G8[4]-31-1) and the Program of Science Technology Basis and Conditional Platform in China (Grant No. 505005).

Abstract

Panicle angle (PA) of 254 recombinant inbred lines derived from a cross between two japonica varieties Xiushui 79 and C Bao was investigated under four environments, and a genetic linkage map including 111 SSR markers was constructed. Genetic analysis was conducted by mixed major gene plus polygene inheritance models, and quantitative trait loci (QTLs) identification by the QTLNetwork 2.0 and the composite interval mapping approach of WinQTLCart 2.5 software. Results showed that the PA trait was controlled by two major genes plus polygenes, mainly by major genes. Eight QTLs for PA were detected by the QTLNetwork 2.0 software, and each locus explained 0.01% to 39.89% of the phenotypic variation. Twelve QTLs for PA were detected by the WinQTLCart 2.5 software, with each locus explaining 2.83% to 30.60% of the phenotypic variation. Two major QTLs (qPA9.2 and qPA9.5) distributed between RM3700 and RM3600 and between RM5652 and RM410, respectively, and a moderate QTL (qPA9.7) distributed between RM257 and OSR28, were both detected by the two methods in all of the four environments. The negative effect alleles of the three QTLs were from Xiushui 79. In addition, eight pairs of epistatic QTLs with minor effects were also detected. QTL × environment interactions were not significant for additive QTLs and epistatic QTL pairs.

Cite this article

NIU Fu-an, LIU Jian, GUO Yuan, CHEN Lan, JIANG Jian-hua, HONG De-lin . New Stably Expressed Loci Responsible for Panicle Angle Trait in Japonica Rice in Four Environments[J]. Rice Science, 2013 , 20(2) : 111 -119 . DOI: 10.1016/S1672-6308(13)60119-5

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