文献类型： 外文期刊
作者： Zhang, Jie 1 ; Guo, Shaogui 1 ; Ji, Gaojie 1 ; Zhao, Hong 1 ; Sun, Honghe 1 ; Ren, Yi 1 ; Tian, Shouwei 1 ; Li, Maoying 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Watermelon & Melon Improvement Ctr, Key Lab Biol & Genet Improvement Hort Crops North, Beijing Key Lab Vegetable Germplasm Improvement, Beijing 100097, Peoples R China
2.Chinese Acad Agr Engn Planning & Design, Beijing 100125, Peoples R China
关键词： watermelon (Citrullus lanatus); sex determination; gynoecy; ClWIP1; chromosome translocation; transcriptome
期刊名称：PLANT JOURNAL （ 影响因子：6.417； 五年影响因子：7.627 ）
ISSN： 0960-7412
年卷期：
页码：
收录情况： SCI
摘要： To understand sex determination in watermelon (Citrullus lanatus), a spontaneous gynoecious watermelon mutant, XHBGM, was selected from the monoecious wild type XHB. Using map-based cloning, resequencing and fluorescence in situ hybridization analysis, a unique chromosome translocation between chromosome 2 and chromosome 3 was found in XHBGM. Based on the breakpoint location in chromosome 2, a putative C2H2 zinc finger transcription factor gene, ClWIP1 (gene ID Cla008537), an orthologue of the melon gynoecy gene CmWIP1, was disrupted. Using clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated system 9 to edit ClWIP1, we obtained gynoecious watermelon lines. Functional studies showed that ClWIP1 is expressed specifically in carpel primordia and is related to the abortion of carpel primordia in early floral development. To identify the cellular and metabolic processes associated with ClWIP1, we compared the shoot apex transcriptomes of two gynoecious mutants and their corresponding wild types. Transcriptome analysis showed that differentially expressed genes related to the ethylene and cytokinin pathways were upregulated in the gynoecious mutants. This study explores the molecular mechanism of sex determination in watermelon and provides a theoretical and technical basis for breeding elite gynoecious watermelon lines.
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