QTL analysis for cooking traits of super rice with a high‐density SNP genetic map and fine mapping of a novel boiled grain length locus. Issue 5 (13th August 2015)

• Record Type: Journal Article
• Authors: Li, Yuanyuan; Tao, Hongjian; Xu, Jie; Shi, Zhenyuan; Ye, Weijun; Wu, Liwen; Zeng, Dali; Gao, Zhenyu; Guo, Longbiao; Yuanyuan, Li
• Is Part Of: Plant breeding. Volume 134:Issue 5(2015)
• Page Start: 535
• Page End: 541
• Publication Date: 2015-08-13
• Subjects: Plant breeding -- Periodicals; 631.52
• DOI: 10.1111/pbr.12294
• Languages: English
• ISSNs: 0179-9541

Abstract

<abstract abstract-type="main" id="pbr12294-abs-0001"> <title>Abstract</title> <p>Hybrid rice has contributed substantially to the improvement of grain production worldwide, yet its poor cooking and tasting characteristics have long been recognized. In this study, 132 recombinant inbred lines derived from LYPJ were used to identify quantitative trait loci (QTLs) for 12 cooking traits with the high‐density SNP linkage map recently developed by our team. We identified 17 QTLs on chromosomes 1, 2, 4, 5, 6, 7, 8, 9 and 11, which accounted for 7.50% to 23.50% of the phenotypic variations. A novel major QTL <italic>qBGL7</italic> for boiled grain length was further fine‐mapped to an interval of 440 Kb between the two markers RM21906 and gl3 using a BC₃F₂ population. Two near‐isogenic lines with extreme boiled grain length, <italic>GX5‐176</italic> and <italic>GX5‐101, </italic> could be directly used in improving cooking quality. We also identified a QTL for soaked grain width expansion rate, <italic>qSGWE6, </italic> in the <italic>Wx</italic> gene region on chromosome 6. The <italic>Wx</italic> differential regulation coincided with sequential variation between the two parents. Our work offered a theoretical basis for molecular breeding of high‐quality hybrid rice.</p> </abstract>