该基因的自然变异赋予了水稻抗冷性，使其能够适应温带气候。
Natural variation in the gene confers chilling tolerance in rice and allowed adaptation to a temperate climate.
机构信息
Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, 410125 Changsha, China.
National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, 430070 Wuhan, China.
出版信息
Proc Natl Acad Sci U S A. 2019 Feb 26;116(9):3494-3501. doi: 10.1073/pnas.1819769116. Epub 2019 Feb 11.
Rice ( L.) is a chilling-sensitive staple crop that originated in subtropical regions of Asia. Introduction of the chilling tolerance trait enables the expansion of rice cultivation to temperate regions. Here we report the cloning and characterization of , a quantitative trait locus (QTL) that confers chilling tolerance on temperate rice. encodes an oxidase that catalyzes the conversion of biologically active jasmonoyl-L-isoleucine (JA-Ile) to the inactive form 12-hydroxy-JA-Ile (12OH-JA-Ile) and fine-tunes the JA-mediated chilling response. Natural variants in diverged between and rice during domestication. A specific allele from temperate rice, which gained a putative MYB cis-element in the promoter of during the divergence of the two ecotypes, enhances the chilling tolerance of temperate rice and allows it to adapt to a temperate climate. The results of this study extend our understanding of the northward expansion of rice cultivation and provide a target gene for the improvement of chilling tolerance in rice.
水稻（L.）是一种喜冷的主要粮食作物，起源于亚洲亚热带地区。引入耐寒特性使水稻种植扩展到温带地区成为可能。在这里，我们报道了一个数量性状位点（QTL）的克隆和特征，该位点赋予温带水稻耐寒性。编码一种氧化酶，该酶催化生物活性茉莉酰基-L-异亮氨酸（JA-Ile）转化为非活性形式 12-羟基-JA-Ile（12OH-JA-Ile），并精细调节 JA 介导的冷响应。在驯化过程中，和水稻之间的自然变异在和之间发生分歧。来自温带水稻的一个特定等位基因，在这两个生态型分化过程中，在的启动子中获得了一个假定的 MYB 顺式元件，增强了温带水稻的耐寒性，使其能够适应温带气候。本研究结果扩展了我们对水稻向北种植扩展的理解，并为提高水稻耐寒性提供了一个靶基因。
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