Genetic dissection of the developmental behaviours of plant height in wheat under diverse water regimes

文献类型： 外文期刊

第一作者： Wu, Xianshan

作者： Wu, Xianshan;Wang, Zhenghang;Chang, Xiaoping;Jing, Ruilian

作者机构：

关键词： genotype;plant height;water regime;ontogeny;marker-assisted selection;quantitative trait locus;developmental behavior

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.992； 五年影响因子：7.86 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Plant height (PH), a crucial trait related to yield potential in crop plants, is known to be typically quantitatively inherited. However, its full expression can be inhibited by a limited water supply. In this study, the genetic basis of the developmental behaviour of PH was assessed in a 150-line wheat (Triticum aestivum L.) doubled haploid population (Hanxuan 10xLumai 14) grown in 10 environments (yearxsitexwater regime combinations) by unconditional and conditional quantitative trait locus (QTL) analyses in a mixed linear model. Genes that were expressed selectively during ontogeny were identified. No single QTL was continually active in all periods of PH growth, and QTLs with additive effects (A-QTLs) expressed in the period S1 vertical bar S0 (the period from the original point to the jointing stage) formed a foundation for PH development. Additive main effects (a effects), which were mostly expressed in S1 vertical bar S0, were more important than epistatic main effects (aa effects) or QTLxenvironment interaction (QE) effects, suggesting that S1 vertical bar S0 was the most significant development period affecting PH growth. A few QTLs, such as QPh.cgb-6B.7, showed high adaptability for water-limited environments. Many QTLs, including four A-QTLs (QPh.cgb-2D.1, QPh.cgb-4B.1, QPh.cgb-4D.1, and QPh.cgb-5A.7) coincident with previously identified reduced height (Rht) genes (Rht8, Rht1, Rht2, and Rht9), interacted with more than one other QTL, indicating that the genetic architecture underlying PH development is a network of genes with additive and epistatic effects. Therefore, based on multilocus combinations in S1 vertical bar S0, superior genotypes were predicted for guiding improvements in breeding for PH.

分类号： Q94

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