The wheat VRN2 gene is a flowering repressor down-regulated by vernalization
The wheat VRN2 gene is a flowering repressor down-regulated by vernalization
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DOI：
10.1126/science.1094305
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发表时间：
2004-03-12
期刊：
影响因子：
56.9
通讯作者：
Dubcovsky, J
中科院分区：
文献类型：
--
作者：
Yan, LL;Loukoianov, A;Dubcovsky, J
具有冬季生长习性的植物在暴露在寒冷的温度下几周时会更早开花，这一过程被称为春化。我们在这里报道了小麦春化基因VRN2的定位克隆，它是一个受春化下调的显性开花抑制基因。VRN2功能的丧失，无论是由于自然突变或缺失，都导致了不需要春化就能开花的春系。通过RNA干扰降低VRN2的RNA水平，使转基因冬小麦植株的开花时间加快了一个多月。
Plants with a winter growth habit flower earlier when exposed for several weeks to cold temperatures, a process called vernalization. We report here the positional cloning of the wheat vernalization gene VRN2, a dominant repressor of flowering that is down-regulated by vernalization. Loss of function of VRN2, whether by natural mutations or deletions, resulted in spring lines, which do not require vernalization to flower. Reduction of the RNA level of VRN2 by RNA interference accelerated the flowering time of transgenic winter-wheat plants by more than a month.