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Genetic mapping of quantitative trait loci associated with fiber and lignin content in rice

文献类型: 外文期刊

作者: Bao, J. S. 1 ; Jin, L. 2 ; Shen, Y. 2 ; Xie, J. K. 2 ;

作者机构: 1.Zhejiang Univ, Inst Nucl Agr Sci, Coll Agr & Biotechnol, Hangzhou 310029, Peoples R China

2.Zhejiang Univ, Inst Nucl Agr Sci, Coll Agr & Biotechnol, Hangzhou 310029, Peoples R China; Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang 330200, Peoples R China

关键词: rice straw;acid detergent fiber;neutral detergent fiber;lignin;cell wall component;QTL

期刊名称:CEREAL RESEARCH COMMUNICATIONS ( 影响因子:0.85; 五年影响因子:1.067 )

ISSN: 0133-3720

年卷期: 2007 年 35 卷 1 期

页码:

收录情况: SCI

摘要: Rice straw represents a significant energy source for ruminant animals, and fibers and lignin contents of rice straw are negatively related to intake potential of forages. For improvement of the digestibility of rice straw, it is necessary to understand the genetic basis of the related traits. In present study, mapping of quantitative trait loci (QTL) for acid detergent fiber (ADF), neutral detergent fiber (NDF), and acid detergent lignin (ADL) was carried out using a doubled haploid (DH) population derived from a cross between indica variety Zai-Ye-Qing 8 (ZYQ8) and japonica variety Jing-Xi 17 (JX17). The results indicated that all three parameters were continuously distributed among the DH lines, but many DH lines showed transgressive segregation for all the three traits. A total of three main-effect QTLs were identified for ADF and ADL, two of which, qADF-9 and qADL-9, shared the same region on chromosome 9. These two main-effect QTLs explained more than 20% of the total phenotypic variations, whereas the other QTL, qADF-5, explained 12.8% of the total phenotypic variation for ADF. In addition, another two epistatic QTLs, qADF-2 and qADF-3 could explain 17.6% of the total variations. Thus, we concluded that both main-effects and epistatic QTLs were important in controlling the genetic basis of ADF.

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