Mapping of quantitative trait loci controlling heading date among rice cultivars in the northernmost region of Japan
Mapping of quantitative trait loci controlling heading date among rice cultivars in the northernmost region of Japan
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DOI：
10.1270/jsbbs.58.367
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发表时间：
2008-12-01
期刊：
影响因子：
2.4
通讯作者：
Sekiguchi, Hiroshi
中科院分区：
文献类型：
--
作者：
Fujino, Kenji;Sekiguchi, Hiroshi
抽穗期是影响水稻品种区域性和季节性适应性的主要因素。虽然许多基因控制抽穗期已被确定使用几个作图群体，它是不清楚哪些先前确定的基因有助于抽穗期在特定地区的变化。然而，由于水稻品种间的遗传关系密切，在特定地区的水稻育种中，需要花费大量的精力来鉴定水稻品种间的数量性状位点（QTL）。在这项研究中，我们在日本最北部的北海道地区的水稻品种中，在3个F1群体中鉴定了控制抽穗期的QTL。抽穗期的分离在所有群体中是连续的。对于遗传关系密切的群体的QTL分析，我们使用位于已知抽穗期QTL附近的SSR标记。在第3和第6染色体上检测到3个控制抽穗期的QTL qDTH 3、qDTH-6-1和qDTH-6 -2。并与已知的QTL进行了相关性分析。
Heading date is the major factor in the regional and seasonal adaptation of rice cultivars. Although many genes controlling heading date have been identified using several mapping populations, it is not clear which previously identified genes contribute to the variation of heading date in particular regions. However, great effort is needed to identify quantitative trait loci (QTLs) among rice cultivars in rice breeding programs in a particular region because they are genetically closely related. In this study, we identified QTLs controlling]leading date in 3 F, Populations among rice cultivars in Hokkaido, the northernmost region of Japan. The segregations of heading date were continuous in all Populations. For QTL analysis in populations with genetically close relationships, we used SSR markers located near the known QTLs for the heading date. Three QTLs for the heading date, qDTH3, qDTH-6-1, and qDTH6-2, were detected on chromosomes 3 and 6. The relationships between the three QTLs identified in this study and the known QTLs are discussed.