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首页> 外文期刊>Chinese science bulletin >Dynamic analysis of QTL for plant height at different developmental stages in maize (Lea mays L.)
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Dynamic analysis of QTL for plant height at different developmental stages in maize (Lea mays L.)

机译：玉米不同发育阶段株高QTL的动态分析

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Plant height in maize is not only one of important agronomic traits, but also one of model traits suitable for study of developmental biology. Using data from field tests in two locations (Wuhan and Xiangfan) within the same year and a molecular linkage map covering all of 10 chromosomes, QTLs affecting plant height at five different developmental stages were mapped and analyzed by the combination of composite interval mapping and the conditional analysis method. Eight QTLs for plant height at different stages were located at different regions of five chromosomes (LOD ≥ 2.5). The results showed that there were different effect values of QTL on plant height at different developmental stages. Three QTLs were detected at all of five stages. With different stages, contributory percentage of single QTL to plant height varied between 3.8% and 17.1%. It suggested that the expression of each QTL controlling plant height was different at different stages. With net growth, seven conditional QTLs for plant height were detected. Conditional QTLs were nearly detected at each stage, and QTLs of Phl-1, Phl-2, Ph3, Ph5-2 and Ph9 were detected at both locations (Wuhan and Xiangfan). The contributory percentage of single conditional QTL to plant height varied between 3.8% and 12.3%, indicating that QTLs for plant height are expressed in different time-space. Therefore, QTL expressed at different stages should be considered when marker assistant selection is conducted for quantitative traits.
机译：玉米的株高不仅是重要的农艺性状之一，而且是适合发育生物学研究的典型性状之一。利用同年在两个地点（武汉和襄樊）的田间试验数据以及涵盖所有10条染色体的分子连锁图谱，通过复合间隔图谱分析和结合分析，分析了在五个不同发育阶段影响植物高度的QTL。条件分析方法。不同阶段的八个植物高度QTL位于五个染色体的不同区域（LOD≥2.5）。结果表明，不同发育时期QTL对株高的影响值不同。在五个阶段的所有阶段都检测到三个QTL。在不同阶段，单个QTL对株高的贡献百分比在3.8％和17.1％之间变化。这表明在不同阶段，控制植物高度的每个QTL的表达是不同的。随着净增长，检测到七个植物高度的条件性QTL。在每个阶段几乎都检测到条件性QTL，并且在两个位置（武汉和襄樊）均检测到Phl-1，Phl-2，Ph3，Ph5-2和Ph9的QTL。单个条件性QTL对株高的贡献百分比在3.8％和12.3％之间变化，表明对于株高的QTL在不同的时空表达。因此，当进行数量性状的标记辅助选择时，应考虑在不同阶段表达的QTL。

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