摘要
水稻穗颈长度是影响杂交水稻制种产量提高的重要农艺性状之一。文章利用94个以籼稻品种9311为遗传背景、粳稻品种日本晴为染色体片段供体的覆盖全基因组的染色体片段置换系(Chromosome segment substitution lines,CSSL)为材料,调查和分析CSSL群体及双亲的穗颈长度。结果表明:在17个置换系中检测到8个控制水稻穗颈长度的数量性状位点(Quantitative trait loci,QTL),分别位于第2、3、7、8、9和第11染色体;利用代换作图法,定位了其中的7个穗颈长度QTL;其加性效应值介于0.10～3.20之间,其中qPE-9和qPE-11的加性效应值较大,平均效应值分别为3.15和2.95,表现为主效基因特征;qPE-2-2、qPE-3-1、qPE-3-2、qPE-7和qPE-8等5个QTL被定位在小于10.0cM的区段内。利用CSSL可以有效地鉴定水稻穗颈长度QTL,这些QTL为分子标记辅助选育穗颈长度适中的水稻品系及其进一步的精细定位奠定了基础。
Panicle exertion, the distance between the leaf cushion of flag and the neck-panicle node, is an important morphological trait, which has significant impact on hybrid seed production of rice. In this study, 94 chromosome segment substitution lines （CSSL）, derived from 9311/Nipponbare with 9311 as the recurrent parent, were used to analyze quantitative trait loci （QTL） controlling the panicle exertion. The results showed that 17 CSSL contained QTL for the panicle exertion. Using substitution mapping, 8 QTLs were mapped on rice chromosomes 2, 3, 7, 8, 9, and 11, respectively. The QTL additive effect ranged from 0.10 to 3.20, and the additive effects of qPE-9 and qPE-11 were 3.15 and 2.95, respectively, showing the feature of a major gene. In addition, qPE-2-2, qPE-3-1, qPE-3-2, qPE-7, and qPE-8 were mapped in a marker interval less than 10.0 cM. Mapping of the QTL has laid a foundation for improving the panicle exertion with marker-assisted selection and cloning of the QTL in rice.
出处
《遗传》
CAS
CSCD
北大核心
2009年第7期741-747,共7页
Hereditas（Beijing)
基金
国家高技术研究发展计划(863计划)项目(编号:2006AA100101)
国家科技支撑计划项目(编号:2006BAD01A01-5)
农业部行业科研专项(编号:nyhyzx07-001-006)
江苏省农业科技自主创新基金项目(编号:CX[08]603)资助
