Recurrent excision of a hAT-like transposable element in CmAPRR2 leads to the "shooting star" melon phenotype
文献类型： 外文期刊
作者： Zhang, Wei 1 ; Liao, Shengjin 2 ; Zhang, Jie 2 ; Sun, Honghe 2 ; Li, Shaofang 2 ; Zhang, Haiying 2 ; Gong, Guoyi 2 ; Shen, Huolin 1 ; Xu, Yong 1 ;
作者机构： 1.China Agr Univ, Coll Hort, Dept Vegetable Sci, Beijing 100193, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Vegetables, State Key Lab Vegetable Biobreeding, Beijing Vegetable Res Ctr,Beijing Key Lab Vegetabl, Beijing 100097, Peoples R China
关键词： shooting star; chlorophyll accumulation; hAT; transposon; melon
期刊名称：PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：7.0 ）
ISSN： 0960-7412
年卷期： 2024 年 120 卷 3 期
页码：
收录情况： SCI
摘要： The external appearance of fruit commodities is an essential trait that has profound effects on consumer preferences. A natural melon variety, characterized by an uneven and patchy arrangement of dark green streaks and spots on the white-skinned rind, resembles shooting stars streaking across the sky; thus, this variety is called "Shooting Star" (SS). To investigate the mechanism underlying the SS melon rind pattern, we initially discovered that the variegated dark green color results from chlorophyll accumulation on the white skin. We then constructed a segregation population by crossing a SS inbred line with a white rind (WR) inbred line and used bulk segregant analysis (BSA) revealed that the SS phenotype is controlled by a single dominant gene, CmAPRR2, which has been previously confirmed to determine dark green coloration. Further genomic analysis revealed a hAT-like transposable element (TE) inserted in CmAPRR2. This TE in CmAPRR2 is recurrently excised from rind tissues, activating the expression of CmAPRR2. This activation promotes the accumulation of chlorophyll, leading to the variegated dark green color on the rind, and ultimately resulting in the SS rind phenotype. Therefore, we propose that the SS phenotype results from the recurrent excision of the hAT-like TE in CmAPRR2.
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