Stepwise selection of natural variations at CTB2 and CTB4a improves cold adaptation during domestication of japonica rice
文献类型： 外文期刊
作者： Li, Jilong 1 ; Zeng, Yawen 3 ; Pan, Yinghua 1 ; Zhou, Lei 1 ; Zhang, Zhanying 1 ; Guo, Haifeng 1 ; Lou, Qijin 1 ; Shui, G 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing Key Lab Crop Genet Improvement, State Key Lab Agrobiotechnol, Beijing 100193, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
3.Yunnan Acad Agr Sci, Biotechnol & Genet Resources Inst, Kunming 650205, Yunnan, Peoples R China
4.Guangxi Acad Agr Sci, Rice Res Inst, Nanning 530007, Peoples R China
5.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improve, Wuhan 430064, Peoples R China
6.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol Dev Biol, Beijing 100101, Peoples R China
7.Lipid ALL Technol Ltd, Changzhou 213000, Jiangsu, Peoples R China
8.Yunnan Acad Agr Sci, Inst Crop Sci, Kunming 650205, Yunnan, Peoples R China
9.Lijiang Inst Agr Sci, Lijiang 674100, Peoples R China
10.Heilongjiang Acad Agr Sci, Rice Res Inst, Jiamusi 154026, Peoples R China
11.China Agr Univ, Coll Biol Sci, State Key Lab Plant Physiol & Biochem, Beijing 100193, Peoples R China
关键词： cold adaptation; de novo mutation; rice; standing variation; stepwise selection
期刊名称：NEW PHYTOLOGIST （ 影响因子：10.152； 五年影响因子：10.476 ）
ISSN： 0028-646X
年卷期： 2021 年 231 卷 3 期
页码：
收录情况： SCI
摘要： The improvement of cold adaptation has contributed to the increased growing area of rice. Standing variation and de novo mutation are distinct natural sources of beneficial alleles in plant adaptation. However, the genetic mechanisms and evolutionary patterns underlying these sources in a single population during crop domestication remain elusive. Here we cloned the CTB2 gene, encoding a UDP-glucose sterol glucosyltransferase, for cold tolerance in rice at the booting stage. A single standing variation (I408V) in the conserved UDPGT domain of CTB2 originated from Chinese Oryza rufipogon and contributed to the cold adaptation of Oryza sativa ssp. japonica. CTB2 is located in a 56.8 kb region, including the previously reported gene CTB4a in which de novo mutation arose c. 3200 yr BP in Yunnan province, China, conferring cold tolerance. Standing variation of CTB2 and de novo mutation of CTB4a underwent stepwise selection to facilitate cold adaptation to expand rice cultivation from high-altitude to high-latitude regions. These results provide an example of stepwise selection on two kinds of variation and describe a new molecular mechanism of cold adaptation in japonica rice.
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