QTL detection of amino acid content in grains of rice using advanced backcross introgression lines

文献类型: 外文期刊

第一作者: Cheng, Li-Rui

作者: Cheng, Li-Rui;Luo, Cheng-Gang;Xu, Jian-Long

作者机构:

关键词: Amino acid content;grain quality;introgression lines;QTL;rice

期刊名称:RESEARCH ON CROPS ( 影响因子:0.103; )

ISSN: 0972-3226

年卷期: 2013 年 14 卷 2 期

页码:

收录情况: SCI

摘要: Improvement of grain quality, such as protein content (PC) and various amino acid contents (AAC) is an important breeding objective in rice (Oryza sativa L.). One hundred and thirty-two advanced backcross introgression lines derived, from a cross between japonica cultivar Xiushui09 and indica breeding line IR2061 were developed and used to study the inheritance of AAC in rice. A total of 40 AAC QTLs were identified and located on all chromosomes except that 7 and 9 in milled rice, which can explain the total phenotypic variation ranging from 4.97% for Ser content to 26.30% for Thr content with an average of 10.33%. Eight QTL clusters were identified on chromosomes 2, 3, 5, 6 and 11. Among them, the QTL cluster in the region of RM536-RM229 on chromosome 11 was exclusively associated with essential amino acid content. Many regions containing QTL clusters had a wide coincidence with the loci reported previously. These results provided some useful information on marker-assisted selection (MAS) for quality by marker-assisted controlling the balance of various AAC.

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