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Identify QTLs for grain size and weight in common wild rice using chromosome segment substitution lines across six environments

文献类型： 外文期刊

作者： Qi, Lan 1 ; Sun, Yan 2 ; Li, Jing 2 ; Su, Long 2 ; Zheng, Xiaoming 2 ; Wang, Xiaoning 3 ; Li, Kaimian 1 ; Yang, Qingwen 2 ;

作者机构： 1.Hainan Univ, Inst Trop Agr & Forestry, Haikou 570228, Hainan, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

3.Hainan Acad Agr Sci, Key Lab Crop Genet Breeding, Haikou 571100, Hainan, Peoples R China

关键词： Oryza rufipogon Griff.;chromosome segment substitution lines;grain-related traits;quantitative trait loci

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN： 1344-7610

年卷期： 2017 年 67 卷 5 期

页码：

收录情况： SCI

摘要： Grain size and weight are important determinants of rice yield. The identification of beneficial genes from wild rice that have been lost or weakened in cultivated rice has become increasingly important for modern breeding strategies. In this study, we constructed a set of chromosome segment substitution lines (CSSLs) of wild rice, Oryza rufipogon with the indica cultivar 9311 genetic background. Four grain-related traits, i.e., grain length (GL), grain width (GW), length-width ratio (LWR), and thousand grain weight (TGW), were screened across six environments. A total of 37 quantitative trait loci (QTLs) were identified in these environments and mapped to 12 chromosomes. Sixteen QTLs were detected in at least two environments, and two QTL clusters were observed on Chr. 4 and Chr. 8. Based on a comparative analysis with QTLs identified in previous studies, the CSSLs between Oryza rufipogon accessions and 9311 had high genetic diversity. Among the sixteen stable QTLs, seven for TGW, LWR, GL, and GW were not previously identified, indicating potentially novel alleles from wild rice. These CSSLs provide powerful tools for functional studies and the cloning of essential genes in rice; furthermore, we identified elite germplasm for rice variety improvement.

  • 相关文献

[1]Development and characterization of chromosome segment substitution lines derived from Oryza rufipogon in the genetic background of O. sativa spp. indica cultivar 9311. Qiao, Weihua,Qi, Lan,Cheng, Zhijun,Su, Long,Li, Jing,Sun, Yan,Zheng, Xiaoming,Yang, Qingwen,Qi, Lan,Ren, Junfang. 2016

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