水稻光合功能相关性状的QTL分析[j]。

Mao-Long Hu, Chun-Ming Wang, Quan-Hai Yang, Hu-Qu Zhai, Wei Lu, Rong-Xian Zhang, Jian-Min Wan
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引用次数: 0

摘要

以粳稻品种金麦(Kinmaze)与籼稻品种DV85 (DV85)杂交获得的81个F11重组自交系(Recombinant Inbred lines, RILs)为定位群体,对与光合功能相关性状的QTL进行了检测。叶片总氮含量(TLN)、叶绿素a/b比(Chl;测定抽穗后第7天水稻叶片叶绿素含量(Chl)和a:b)。共检测到6个qtl, PVE在11.2% ~ 29.6%之间,LOD在2.66 ~ 4.81之间。其中,1、2和11号染色体上检测到3个TLN qtl, PVE分别为17.3%、15.3%和13.7%;3号和4号染色体上的a:b, PVE分别为13.8%和29.6%,1号染色体上的Chl各1个,PVE为11.2%。其中4个qtl为本研究新报道的qtl。有趣的是,本文报道的控制叶绿素含量的QTL,即qCC-1,是在1号染色体上RFLP标记C122的区域检测到的,根据前人的研究,该区域含有nadh -谷氨酸合酶结构基因。由于叶绿素的生物合成始于谷氨酸,qCC-1在光合作用中起着至关重要的作用。抽穗后第30天没有检测到控制叶绿素含量的QTL,说明随着叶片衰老,QTL控制叶绿素含量的作用减弱。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[QTL analysis for traits associated with photosynthetic functions in rice (Oryza sativa L.)].

A mapping population of 81 F11 lines (Recombinant Inbred Lines, RILs), derived from a cross between a japonica variety Kinmaze and an indica variety DV85 by single-seed descent method, was used to detect quantitative trait loci (QTL) for traits associated with photosynthetic functions. Total leaf nitrogen content (TLN), chlorophyll a/b ratio (Chl. a:b) and chlorophyll content (Chl) were measured in leaves of rice (Oryza sativa L.) at the 7th day after heading. A total of six putative QTLs were detected with percentage of variance explained (PVE) ranging between 11.2% -29.6%, and LOD of QTLs 2.66-4.81. Of those putative QTLs, three for TLN were detected on chromosomes 1,2 and 11, with PVE of 17.3%, 15.3% and 13.7%, respectively;Two controlling Chl. a:b on chromosomes 3 and 4, PVE of 13.8% and 29.6%, one for Chl on chromosome 1, PVE of 11.2%. Four of those detected QTLs were newly reported in this study. Interestingly, the QTL controlling chlorophyll content,namely qCC-1 reported here,was detected in the region of the RFLP marker C122 on chromosome 1, where harbored NADH-glutamate synthase structure gene according to a previous study. Because the biosynthesis of chlorophyll begins with glutamate, qCC-1 would play a vital role in photosynthetic functions. Whereas,no QTL controlling chlorophyll content were detected at the 30th day after heading, suggesting that the effect of the QTL controlling chlorophyll content decreased during leaf senescence.

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