Genome-Wide Identification and Characterization of the IGT Gene Family in Allotetraploid Rapeseed (Brassica napus L.)
文献类型： 外文期刊
作者： Sun, Chengming 1 ; Zhang, Chun 1 ; Wang, Xiadong 1 ; Zhao, Xiaozhen 1 ; Chen, Feng 1 ; Zhang, Wei 1 ; Hu, Maolong 1 ; Fu, 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Key Lab Cotton & Rapeseed, Minist Agr & Rural Affairs, Prov Key Lab Agrobiol,Inst Ind Crops, Nanjing 210014, Peoples R China
2.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Coll Plant Sci & Technol, Wuhan, Peoples R China
3.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Natl Key Lab Crop Genet & Germplasm Innovat, Nanjing, Peoples R China
关键词： Brassica napus; IGT family; LAZY1; plant architecture; WGCNA
期刊名称：DNA AND CELL BIOLOGY （ 影响因子：3.311； 五年影响因子：3.557 ）
ISSN： 1044-5498
年卷期： 2021 年 40 卷 3 期
页码：
收录情况： SCI
摘要： IGT family genes function critically to regulate lateral organ orientation in plants. However, little information is available about this family of genes in Brassica napus. In this study, 27 BnIGT genes were identified on 16 chromosomes and divided into seven clades, namely LAZY1 similar to LAZY6 and TAC1 (Tiller Angle Control 1), based on their phylogenetic relationships. Duplication analysis revealed that 91.1% of the gene pairs were derived from whole-genome duplication. Most BnIGT genes had a similar structural pattern with one or two very short exons followed by a long and a shorter exon. Common and specific motifs were identified among the seven clades, and motif 1, containing the family-specific G phi L(A/T)IGT sequence, was observed in all clades except LAZY5. Three types of cis-elements pertinent to transcription factor binding, light responses, and hormone signaling were detected in the BnIGT promoters. Intriguingly, more than half of the BnIGT genes exhibited no or very low expression in various tissues, and the LAZY1 and TAC1 clade members showed distinct tissue expression preferences. Coexpression analysis revealed that the LAZY1 members had strong associations with cell wall biosynthesis genes. This analysis provides a deeper understanding of the BnIGT gene family and will facilitate further deduction of their role in regulating plant architecture in B. napus.
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