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Genetic mapping, transcriptomic sequencing and metabolic profiling indicated a glutathione S-transferase is responsible for the red-spot-petals in Gossypium arboreum

文献类型: 外文期刊

作者: Zhang, Sujun 1 ; Chen, Jie 3 ; Jiang, Tao 2 ; Cai, Xiao 1 ; Wang, Haitao 1 ; Liu, Cunjing 1 ; Tang, Liyuan 1 ; Li, Xinghe 1 ; Zhang, Xiangyun 1 ; Zhang, Jianhong 1 ;

作者机构: 1.Hebei Acad Agr & Forestry Sci, Inst Cotton, Key Lab Biol & Genet Improvement Cotton Huanghuai, Minist Agr & Rural Affairs, Shijiazhuang 050051, Hebei, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Inst Cash Crops, Shijiazhuang 050051, Hebei, Peoples R China

3.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R China

期刊名称:THEORETICAL AND APPLIED GENETICS ( 影响因子:5.574; 五年影响因子:5.662 )

ISSN: 0040-5752

年卷期: 2022 年 135 卷 10 期

页码:

收录情况: SCI

摘要: Key message A GST for red-spot-petals in Gossypium arboreum was identified as the candidate under the scope of multi-omics approaches. Colored petal spots are correlated with insect pollination efficiency in Gossypium species. However, molecular mechanisms concerning the formation of red spots on Gossypium arboreum flowers remain elusive. In the current study, the Shixiya1-R (SxyR, with red spots) x Shixiya1-W (SxyW, without red spots) segregating population was utilized to determine that the red-spot-petal phenotype was levered by a single dominant locus. This phenotype was expectedly related to the anthocyanin metabolites, wherein the cyanidin and delphinidin derivatives constituted the major partition. Subsequently, this dominant locus was narrowed to a 3.27 Mb range on chromosome 7 by genomic resequencing from the two parents and the two segregated progeny bulks that have spotted petals or not. Furthermore, differential expressed genes generated from the two bulks at either of three sequential flower developmental stages that spanning the spot formation were intersected with the annotated ones that allocated to the 3.27 Mb interval, which returned eight genes. A glutathione S-transferase-coding gene (Gar07G08900) out of the eight was the only one that exhibited simultaneously differential expression among all three developmental stages, and it was therefore considered to be the probable candidate. Finally, functional validation upon this candidate was achieved by the appearance of scattered petal spots with inhibited expression of Gar07G08900. In conclusion, the current report identified a key gene for the red spotted petal in G. arboreum under the scope of multi-omics approaches, such efforts and embedded molecular resources would benefit future applications underlying the flower color trait in cotton.

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