Mapping of quantitative trait loci for length and distributive characteristic of awn in rice(Oryza sativa L.)
Mapping of quantitative trait loci for length and distributive characteristic of awn in rice(Oryza sativa L.)
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发表时间：
2008
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通讯作者：
Dong Yan-jun
中科院分区：
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作者：
Dong Yan-jun
水稻的芒性状，以芒长和芒分布特性为标志，在水稻的驯化过程中起着重要作用。芒长与芒分布特性的相关性及QTL分析在两个地点进行了水稻每穗有芒小穗数（AP）的测定（上海和海南，中国），使用来自越光（无芒）/ Kasalath（有芒）/结果表明，这两个性状之间存在显著的正相关，共检测到12个控制芒长和芒长的QTL，分别位于6条染色体上的7个基因组区域，对表型总变异的解释率为2.90%~53.24%，大部分QTL中的Kasalath等位基因对表型总变异的解释率为2.90%~53.24%，而无芒越光的3个QTL则使性状增加，并对导致这一结果的原因进行了讨论，有助于水稻驯化和无芒理想品种的分子辅助育种研究。
Awn traits of rice,which marked by awn length and distributive characteristic,are involved in its domestication.Correlation and QTL analysis on awn length(AL) and awn distributive characteristic(percentage of awned spikelets per panicle,AP) in rice were conducted in two locations(Shanghai and Hainan,China) using 182 backcross recombinant inbred lines(BILs)derived from Koshihikari(awnless)/ Kasalath(awned)// Koshihikari.The results of this study showed that there existed significantly positive correlations between the two traits studied.A total of twelve QTLs controlling the two awn traits were detected and located in seven genomic regions on six chromosomes,respectively,which could explain 2.90%~53.24% of total phenotypic variance.Kasalath alleles in most of the QTLs had increasing effects,whereas three QTLs from awnless Koshihikari increase the traits.What brought such a result was discussed.The QTLs detected and the tightly linked molecular markers would be useful in further studies of rice domestication and molecular assistant breeding for awnless ideal varieties.