<FONT face="Verdana">Identification of QTLs for Rice Appearance Quality Traits Across Different Ecological Sites</FONT>

YANG Ya-chun,NI Da-hu,SONG Feng-shun,LI Ze-fu,YI Cheng-xin,YANG Jian-bo

doi:10.3969/j.issn.1001-7216.2011.01.007

Chinese Journal OF Rice Science >

2011 , Vol. 25 >Issue 1: 43 - 51

DOI: https://doi.org/10.3969/j.issn.1001-7216.2011.01.007

研究报告

Identification of QTLs for Rice Appearance Quality Traits Across Different Ecological Sites

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¹Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, China; ² Temasek Life Sciences Laboratory, National University of Singapore， Singapore 119077； *Corresponding author, E-mail： yjianbo@263.net

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2011-01-10

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Abstract

Two rice varieties, Nipponbare (japonica) and 9311 (indica), whose whole genomes have been sequenced, were used as parents to create a recombinant inbred lines population consisting of 190 lines by single seed descent method. The genetic linkage map was constructed with 178 SSR, CAP, and STS markers. Quantitative trait loci (QTLs) were identified for six rice appearance quality traits including chalky grain rate (CGR), chalky area (CA), chalkiness degree (CD), grain length (GL), grain width (GW), grain lengthwidth ratio (GLW) by composite interval mapping method in three different ecological sites (Lingshui, Hefei and Huaiyuan). A total of 39 QTLs were identified, with 6 to 7 for each trait, indicating that rice appearance quality traits were controlled by multiple genes. Eight QTLs were detected at 2 or 3 sites, among which qCD1 and qCD3 (explaining 288% and 321% of variance) were detected in all the three sites. Eleven QTLs were found to have pleiotropy in which a single QTL controlled 2 to 6 traits, and the interval of RM16-RM143 on chromosome 3 controlled the 6 traits. The comparison of QTL identification among the three sites showed that the environment effects were trait dependant. The QTLs for GLW and CD were comparatively stable across sites, whereas those for GW were sensitive to environment.

Key words： rice; appearance quality; quantitative trait locus; grain shape; chalkiness; environment effect; gene pleiotropy

Cite this article

YANG Ya-chun,NI Da-hu,SONG Feng-shun,LI Ze-fu,YI Cheng-xin,YANG Jian-bo . Identification of QTLs for Rice Appearance Quality Traits Across Different Ecological Sites[J]. Chinese Journal OF Rice Science, 2011 , 25(1) : 43 -51 . DOI: 10.3969/j.issn.1001-7216.2011.01.007

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