Photoperiod insensitivity gene essential to the varieties grown in the northern limit region of paddy rice (Oryza sativa L.) cultivation
Photoperiod insensitivity gene essential to the varieties grown in the northern limit region of paddy rice (Oryza sativa L.) cultivation
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DOI：
10.1007/bf00022829
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发表时间：
2004
期刊：
影响因子：
1.9
通讯作者：
Y. Okumoto;K. Ichitani;H. Inoue;T. Tanisaka
中科院分区：
文献类型：
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作者：
Y. Okumoto;K. Ichitani;H. Inoue;T. Tanisaka
极早熟品种的发布使得在日本的北海道（NL 45 -42°）（水稻栽培的北方限制区域）栽培水稻成为可能。在此之前，由于气候条件，特别是夏季短，夏季长日照超过15小时，该地区的水稻种植一直不可行。试验结果表明，在本地区水稻栽培成功的关键在于培育基本营养生长期短的光周期不敏感品种。此外，本研究还利用8个供试材料在控制光周期敏感性的E1、E2和E3位点上分析了控制北海道品种光周期不敏感性的遗传因素。结果表明，所有供试品种均检测到E1基因座的光周期不敏感等位基因carryel，而E2和E3基因座则检测到多个等位基因的存在。我们已经阐明，在日本（除北海道外）和台湾种植的几乎所有的粳稻型品种都携带E1，从而引起强烈的光周期敏感性。因此，可以得出结论，这是北海道品种所必需的基因：在长日照条件下，E1与1使能水稻栽培的交换。
The release of extremely early maturing varieties has made it possible to cultivate rice in Hokkaido (NL45-42°) in Japan, the northern limit region of paddy rice cultivation. Until then, rice cultivation in this region has been impracticable due to the climate condition, especially short summer and long-day more than 15 hours during summer. Experiment results confirmed that the success of rice cultivation in this area depends on raising photoperiod insensitivity varieties with short basic vegetative growth period. Moreover, in this study, the genetic factors controlling the photoperiod insensitivity of Hokkaido varieties were analyzed by using 8 kinds of tester lines for three loci,E1, E2, andE3, controlling photoperiod sensitivity. It was found out that all the varieties examined carryel, a photoperiod insensitivity allele ofE1locus, but as for the other loci,E2andE3, the existence of plural alleles were recognized. We have already clarified that almost all the japonica-type varieties grown in Japan (except Hokkaido) and Taiwan carryE1bringing about strong photoperiod sensitivity. Accordingly, it can be concluded thatelis the gene essential to Hokkaido varieties: the interchange ofE1withe1enabled rice cultivation under long-day condition.