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首页> 外文期刊>Australian Journal of Crop Science >Association mapping for photosynthesis and yield traits under two moisture conditions and their drought indices in winter bread wheat (Triticum aestivum L.) using SSR markers
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Association mapping for photosynthesis and yield traits under two moisture conditions and their drought indices in winter bread wheat (Triticum aestivum L.) using SSR markers

机译：利用SSR标记对两种水分条件下冬小麦（Triticum aestivum L.）光合作用和产量性状及其干旱指数的关联制图。

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Net photosynthesis rate and drought resistance in wheat needs to be improved to enhance overall wheat productivity. Association mapping was used to explore the potential QTLs associated with net photosynthesis rate (Pn), thousand-kernel weight (TKW), biomass plant-1 (BMPP) and grain yield plant-1 (GYPP) under two water conditions and their drought indices, i.e. stress tolerance index (STI) and stress susceptibility index (SSI) in wheat using 269 whole-genome SSR markers in 59 winter wheat genotypes. Large numbers of marker-trait associations (MTAs) were detected for photosynthesis and yield related traits under both water conditions and related drought tolerance indices in both seasons. However, the number of significant associations reduced greatly when Bonferroni correction (FPDR) test was applied. Single marker, i.e. Xpsp3123-7D was associated with multiple traits across moisture conditions as well as growth seasons. Xgwm182-5D was stably associated with TKW under water-stressed conditions and with GYPP under well-watered conditions, respectively in both seasons. Xcfd33-6D was consistently linked with BMPP in both seasons under well-watered condition. A Total of 28 associations for the drought tolerance indices of those phenotypic traits qualified FPDR test. Of these, Xpsp3123-7D was consistently associated with the two drought indices of the traits in two seasons. The markersXwmc707-4A and Xgwm182-5D were stably associated with stress susceptibility index (STI) of BMPP and stress tolerance index (STI) of TKW, respectively across two seasons. These putative QTLs, especially Xpsp312-7D can be the key targets to improve photosynthetic efficiency and yield potential of bread wheat in rainfed ecosystem.
机译：需要提高小麦的净光合速率和抗旱性，以提高小麦的整体生产力。使用关联映射法研究了两种水分条件下与净光合速率（Pn），千粒重（TKW），生物量植物1（BMPP）和谷物产量植物1（GYPP）相关的潜在QTL及其干旱指数，即使用59个冬小麦基因型中的269个全基因组SSR标记，对小麦进行胁迫耐受指数（STI）和胁迫敏感性指数（SSI）。在两个季节中，在水分条件和相关的干旱耐受指数下，均检测到大量光合作用和产量相关性状的标记-性状关联（MTA）。但是，当应用Bonferroni校正（FPDR）测试时，显着关联的数量大大减少。单一标记物，即Xpsp3123-7D与在潮湿条件下以及生长季节的多个性状相关。在两个季节中，Xgwm182-5D分别在缺水条件下与TKW稳定相关，而在充足灌溉条件下与GYPP稳定相关。 Xcfd33-6D在两个季节中均在浇水良好的条件下始终与BMPP相关联。共有28个表型性状的耐旱性指标合格的FPDR试验。其中，Xpsp3123-7D与两个季节中两个性状的干旱指数一致。标记Xwmc707-4A和Xgwm182-5D在两个季节中分别与BMPP的胁迫敏感性指数（STI）和TKW的胁迫耐受性指数（STI）稳定相关。这些推定的QTL，特别是Xpsp312-7D可以成为提高雨养生态系统中面包小麦光合作用效率和增产潜力的关键目标。

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