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首页> 外文期刊>Journal of genetics >Mapping of QTL for tiller number at different stages of growth in wheat using double haploid and immortalized F2 populations
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Mapping of QTL for tiller number at different stages of growth in wheat using double haploid and immortalized F2 populations

机译：双单倍体和永生F2群体的小麦不同生育分till数的QTL定位

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Effective tiller number is one of the most important traits for wheat (Triticum aestivum L.) yield, but the inheritance of tillering is poorly understood. A set of 168 doubled haploid (DH) lines derivatives of a cross between two winter wheat cultivars (Huapei 3 and Yumai 57), and an immortalized F2 (IF2) population generated by randomly permutated intermating of these DHs were investigated, and QTLs of tillering related to the maximum tillering of pre-winter (MTW), maximum tillering in spring (MTS), and effective tillering in harvest (ETH) were mapped. Phenotypic data were collected for the two populations from two different environments. Using inclusive composite interval mapping (ICIM), a total of 9 and 18 significant QTL were detected across environments for tillering in the DH and IF2 populations, respectively. Four QTLs were common between two populations. A major QTL located on the 5D chromosome with the allele originating from Yumai 57 was detected and increased 1.92 and 3.55 tillers in MTW and MTS, respectively. QTLs (QMts6D, QEth6D) having a neighbouring marker interval at Xswes679.1 and Xcfa2129 on chromosome 6D was detected in MTS and ETH. These results provide a better understanding of the genetic factors for selectively expressing the control of tiller number in different growth stages and facilitate marker-assisted selection strategy in breeding.
机译：有效分till数是小麦（Triticum aestivum L.）产量最重要的性状之一，但对分ing的遗传了解甚少。研究了一组168个两个冬小麦品种（Huapei 3和Yumai 57）杂交的双单倍体（DH）系衍生物，以及通过随机排列确定这些DH产生的永生F2（IF2）种群，并研究了分till的QTL绘制了与冬季前最大分ing（MTW），春季最大分till（MTS）和收获时有效分（（ETH）相关的图。从两个不同的环境中收集了这两个种群的表型数据。使用包容性复合区间映射（ICIM），在整个环境中分别检测到DH和IF2种群中分till的总共9个和18个重要QTL。两个人群之间共有四个QTL。检测到位于5D染色体上的主要QTL，其等位基因来自Yumai 57，在MTW和MTS中分别增加了1.92和3.55分till。在MTS和ETH中检测到在6D染色体上的Xswes679.1和Xcfa2129具有相邻标记间隔的QTL（QMts6D，QEth6D）。这些结果提供了对遗传因素的更好理解，以选择性表达不同生长阶段分till数的控制，并促进了育种中标记辅助的选择策略。

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