Mapping of QTLs for leaf developmental behavior in rice (Oryza sativa L.)
Mapping of QTLs for leaf developmental behavior in rice (Oryza sativa L.)
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DOI：
10.1023/b:euph.0000046799.21410.13
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发表时间：
2004-07-01
期刊：
影响因子：
1.9
通讯作者：
Matsuo, M
中科院分区：
文献类型：
--
作者：
Dong, YJ;Kamiunten, H;Matsuo, M
水稻(Oryza sativa L.)叶片发育行为是重要的农艺性状之一，不仅决定营养生长，而且影响籽粒产量。本研究利用源自 2001 年和 2002 年栽培的粳稻品种 Asominori 和籼稻品种 IR24 杂交的重组自交系 (RIL) 来鉴定主要代表叶片发育行为的总叶数 (TNL)、旗叶出苗天数 (DEF) 和主茎出叶率 (LER) 的数量性状位点 (QTL)。观察到了两个亲本方向的分离以及所有三个测试性状的连续变化。检测到这些特征之间存在显着相关性。通过 289 个 RFLP 标记检测到总共 14 个与叶片发育行为相关的 QTL。控制 TNL 的 6 个 QTL 定位于 3、5、6、8、9、12 号染色体，占总表型变异的 5.6%，占总表型变异的 5.6%；控制 DEF 的 3 个 QTL 定位于 3、6、8 号染色体，占总表型变异的 10.7%，占总表型变异的 10.7%；控制 LER 的 5 个 QTL 定位于 1 号染色体（2 QTL)、2、4、9 并解释了 6.2 与 17.5% 的表型变异相似。水稻叶片发育行为 QTL 的鉴定可能有助于在抽穗前使用制造者辅助选择来选择“快速生长的基因型”。
Leaf developmental behavior in rice ( Oryza sativa L.) is one of the important agronomic characteristics, which not only determines vegetative growth but also influences grain yield. This study was conducted to identify quantitative trait loci (QTLs) for total number of leaves (TNL), days to the emergence of flag-leaf (DEF) and the leaf emergence rates (LER) on main stem, which mainly represent leaf developmental behavior, using recombinant inbred lines (RILs) derived from a cross between a japonica variety, Asominori and an indica variety, IR24, cultivated in 2001 and 2002. The transgressive segregations in both parental directions and continuous variations of all three tested traits were observed. Significant correlations among these traits were detected. A total of fourteen QTLs for leaf development behavior were detected with 289 RFLP markers. Six QTLs controlling TNL were mapped to chromosomes 3, 5, 6, 8, 9, 12, and accounted for 5.6similar to15.7% of the total phenotypic variations, and three QTLs for DEF were mapped to chromosome 3, 6, 8 and accounted for 10.7similar to35.4% of total phenotype variation and five QTLs for LER were mapped to chromosome 1(two QTLs), 2, 4, 9 and explained 6.2similar to17.5% of phenotype variation. The identification of QTLs for leaf developmental behavior in rice may be useful for selection of 'fast growing genotype' before heading using maker-assisted selection.