A copy number variant at the HPDA‐D12 locus confers compact plant architecture in cotton. Issue 4 (6th December 2020)

• Record Type: Journal Article
• Authors: Ji, Gaoxiang; Liang, Chengzhen; Cai, Yingfan; Pan, Zhaoe; Meng, Zhigang; Li, Yanyan; Jia, Yinhua; Miao, Yuchen; Pei, Xinxin; Gong, Wenfang; Wang, Xiaoyang; Gao, Qiong; Peng, Zhen; Wang, Liru; Sun, Junling; Geng, Xiaoli; Wang, Pengpeng; Chen, Baojun; Wang, Peilin; Zhu, Tao; He, Shoupu; Zhang, Rui; Du, Xiongming
• Is Part Of: New phytologist. Volume 229:Issue 4(2021)
• Page Start: 2091
• Page End: 2103
• Publication Date: 2020-12-06
• Subjects: CNVs -- cotton -- GhDREB1B -- high planting density -- plant architecture; Botany -- Periodicals; 580
• DOI: 10.1111/nph.17059
• Languages: English
• ISSNs: 0028-646X

Abstract

Summary: 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. We characterized a natural cotton mutant, AiSheng98 ( AS98 ), which exhibits shorter height, shorter branch length, and more acute branch angle than wild‐type. 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. 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. GhDREB1B overexpression confers a significant decrease in plant height and branch length, and reduced branch angle. 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.