A copy number variant at the HPDA‐D12 locus confers compact plant architecture in cotton

第一作者：Gaoxiang Ji

第一单位：中国农业科学院棉花研究所

通讯作者：Xiongming Du

 Abstract 

研究背景：Improving yield is a primary mission for cotton (Gossypium hirsutum) breeders; development of cultivars with suitable architecture for high planting density (HPDA) can increase yield per unit area.

主要研究：We characterized a natural cotton mutant, AiSheng98 (AS98), which exhibits shorter height, shorter branch length, and more acute branch angle than wild‐type.

结果1-HPDA基因CNV变异：A copy number variant at the HPDA locus on Chromosome D12 (HPDA‐D12), encoding a dehydration‐responsive element‐binding (DREB) transcription factor, GhDREB1B, strongly affects plant architecture in the AS98 mutant.

结果2-HPDA-D12表达：We found an association between a tandem duplication of a c. 13.5 kb segment in HPDA‐D12 and elevated GhDREB1B expression resulting in the AS98 mutant phenotype.

结果3-GhDREB1B过表达：GhDREB1B overexpression confers a significant decrease in plant height and branch length, and reduced branch angle. 

结论：Our results suggest that fine‐tuning GhDREB1B expression may be a viable engineering strategy for modification of plant architecture favorable to high planting density in cotton.

 通讯作者 

doi: 10.1111/nph.17059

Journal: New Phytologist

Published online: Dec 06, 2020