Open AccessLarge‐fragment insertion activates gene GaFZ ( Ga08G0121 ) and is associated with the fuzz and trichome reduction in cotton ( Gossypium arboreum )
Author(s) -
Wang Xiaoyang,
Miao Yuchen,
Cai Yingfan,
Sun Gaofei,
Jia Yinhua,
Song Song,
Pan Zhaoe,
Zhang Yuanming,
Wang Liyuan,
Fu Guoyong,
Gao Qiong,
Ji Gaoxiang,
Wang Pengpeng,
Chen Baojun,
Peng Zhen,
Zhang Xiaomeng,
Wang Xiao,
Ding Yi,
Hu Daowu,
Geng Xiaoli,
Wang Liru,
Pang Baoyin,
Gong Wenfang,
He Shoupu,
Du Xiongming
Publication year - 2021
Publication title -
plant biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.525
H-Index - 115
eISSN - 1467-7652
pISSN - 1467-7644
DOI - 10.1111/pbi.13532
Subject(s) - biology , gossypium , trichome , gene , genetics , arabidopsis , genome , enhancer , lint , mutant , botany , gene expression , agronomy
Summary Cotton seeds are typically covered by lint and fuzz fibres. Natural ‘fuzzless’ mutants are an ideal model system for identifying genes that regulate cell initiation and elongation. Here, using a genome‐wide association study (GWAS), we identified a ~ 6.2 kb insertion, larINDEL FZ , located at the end of chromosome 8, composed of a ~ 5.0 kb repetitive sequence and a ~ 1.2 kb fragment translocated from chromosome 12 in fuzzless Gossypium arboreum . The presence of larINDEL FZ was associated with a fuzzless seed and reduced trichome phenotypes in G. arboreum . This distant insertion was predicted to be an enhancer, located ~ 18 kb upstream of the dominant‐repressor GaFZ ( Ga08G0121 ). Ectopic overexpression of GaFZ in Arabidopsis thaliana and G. hirsutum suggested that GaFZ negatively modulates fuzz and trichome development. Co‐expression and interaction analyses demonstrated that GaFZ might impact fuzz fibre/trichome development by repressing the expression of genes in the very‐long‐chain fatty acid elongation pathway. Thus, we identified a novel regulator of fibre/trichome development while providing insights into the importance of noncoding sequences in cotton.