QTLs for agronomic traits detected in recombinant inbred lines derived from a bread wheat × spelt cross
QTLs for agronomic traits detected in recombinant inbred lines derived from a bread wheat × spelt cross
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DOI：
10.1270/jsbbs.18046
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发表时间：
2018-11
期刊：
影响因子：
2.4
通讯作者：
Yuki Sakai;Liangzi Cao;Ryosuke Funata;Takato Shiraishi;Koki Yoshikawa;Kohei Maeno;H. Miura;K. Oni
中科院分区：
文献类型：
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作者：
Yuki Sakai;Liangzi Cao;Ryosuke Funata;Takato Shiraishi;Koki Yoshikawa;Kohei Maeno;H. Miura;K. Oni
斯佩尔特小麦(Triticum aestivum subsp.)Spelta)是普通小麦的一个亚种，是面包小麦(T.aestivum subsp.然而，对面包小麦×斯佩尔特杂交的农艺性状的遗传分析还不够充分。在此，我们对面包小麦×斯佩尔特杂交重组自交系进行了QTL分析。除主效Q基因座外，QSpd.obu-4D还检测到spelt等位基因，其小穗密度高于面包小麦。QSpd.obu-4D对面包小麦Q等位基因的影响很明显，这表明这种变异在带有Q等位基因的斯佩尔特小麦中可能是隐蔽的。其中一个QTL(QG1.obu-1A)从未在面包小麦×斯佩尔特杂交组合中检测到。QHt.obu-7B的spelt小麦等位基因位于VRN-B3区域，可能成为控制抽穗期的新基因源。此外，还检测到了与斯佩尔特小麦低休眠有关的QGI.obu-2B。进一步发掘和鉴定有用的QTL有助于加速斯佩尔特小麦作为遗传资源在面包小麦育种中的利用。
Spelt wheat (Triticum aestivum subsp. spelta), a subspecies of common wheat, is a genetic resource for the breeding of bread wheat (T. aestivum subsp. aestivum); however, genetic analyses of agronomic traits in bread wheat × spelt crosses are insufficient. Here, we conducted QTL analysis in the recombinant inbred lines from a bread wheat × spelt cross. In addition to the major Q locus, QSpd.obu-4D was detected with the spelt allele conferring a higher spikelet density than the bread wheat allele. The effect of QSpd.obu-4D was evident in the presence of the Q allele of bread wheat, suggesting that this variation might be cryptic in spelt wheat with the q allele. Two QTLs with stable effects were identified for grain length, one of which (QGl.obu-1A) has never been detected in a bread wheat × spelt cross. The spelt wheat allele at QHt.obu-7B conferring later heading was identified in the Vrn-B3 region and could be a novel gene source for modifying heading time. Furthermore, QGi.obu-2B, responsible for low grain dormancy of spelt wheat, was detected. Further exploration and identification of useful QTLs could accelerate the utilization of spelt wheat as a genetic resource for bread wheat breeding programs.