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Stepwise selection of natural variations at CTB2 and CTB4a improves cold adaptation during domestication of japonica rice
- Source :
- New Phytologist.
- Publication Year :
- 2021
- Publisher :
- Wiley, 2021.
-
Abstract
- 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.
- Subjects :
- 0106 biological sciences
0301 basic medicine
China
Physiology
Population
Plant Science
Biology
Genes, Plant
01 natural sciences
Japonica
Domestication
03 medical and health sciences
Selection, Genetic
Allele
education
Gene
Alleles
Genetics
education.field_of_study
Oryza sativa
food and beverages
Oryza
biology.organism_classification
Oryza rufipogon
030104 developmental biology
Adaptation
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14698137 and 0028646X
- Database :
- OpenAIRE
- Journal :
- New Phytologist
- Accession number :
- edsair.doi.dedup.....de02c916904842e60be230a128edfa80