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A copy number variant at the HPDA‐D12 locus confers compact plant architecture in cotton
Author(s) -
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
Publication year - 2021
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.17059
Subject(s) - locus (genetics) , mutant , sowing , biology , gossypium hirsutum , phenotype , plant genetics , wild type , botany , horticulture , genetics , gene , regulation of gene expression
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.