Mapping of three QTLs that regulate internode elongation in deepwater rice
Mapping of three QTLs that regulate internode elongation in deepwater rice
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DOI：
10.1270/jsbbs.58.39
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发表时间：
2008-03-01
期刊：
影响因子：
2.4
通讯作者：
Ashikari, Motoyuki
中科院分区：
文献类型：
--
作者：
Hattori, Yoko;Nagai, Keisuke;Ashikari, Motoyuki
深水水稻的节间可以随着水位的上升而伸长。这种独特的特性使深水水稻能够在南亚和东南亚季风季节的严重洪水中生存下来。我们先前对深水水稻品种（Oryza sativa）的数量性状位点（QTL）分析在第1、3和12染色体上检测到QTL。在这项研究中，我们产生了三个近等基因系（近等基因系），拥有三个QTL的每一个回交每个染色体区域到非深水水稻品种。近等基因系在深水条件下表现出节间伸长，我们能够证明QTL的存在并评估每个QTL的影响。利用近等基因系的后代，我们定位了分子标记之间的所有QTL。比较了水稻品种（O.唾液）和野生稻（O. rufipogon）的研究表明，第12染色体上的QTL是深水条件下节间伸长的最重要的QTL。
The internodes of deepwater rice can elongate in response to rises in water level. This unique character allows deepwater rice to survive severe flooding during the monsoon season in South and Southeast Asia. Our previous quantitative trait locus (QTL) analysis of a deepwater rice cultivar (Oryza saliva) detected QTLs on chromosomes 1, 3 and 12. In this study, we produced three nearly isogenic lines (NILs) possessing each of the three QTLs by backcross introduction of each chromosomal region into a non-deepwater rice cultivar. The NILs showed internode elongation under deepwater conditions, and we were able to demonstrate the existence of the QTLs and to evaluate the effect of each QTL. Using progenies of the NILs, we mapped all QTLs between molecular markers. Comparison of the location of the most effective QTL between the rice cultivar (O. saliva) and a wild rice species (O. rufipogon) indicated that the QTL on chromosome 12 is common and is the most important QTL for internode elongation in deepwater condition.