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Identification of Candidate Genes for Green Rind Color in Watermelon

文献类型： 外文期刊

作者： Zhou, Wei 1 ; Yi, Licong 1 ; Wang, Yunqiang 1 ; Wang, Hongsheng 1 ; Li, Qingke 1 ; Wu, Na 1 ; Dai, Zhaoyi 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Ind Crops, Hubei Key Lab Vegetable Germplasm Enhancement & Ge, Wuhan 430064, Peoples R China

2.Minist Agr & Rural Affairs, Coconstruct Minist & Prov, Key Lab Ecol Cultivat Alpine Vegetables, Wuhan 430063, Peoples R China

3.Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Peoples R China

关键词： watermelon (Citrullus lanatus L.); fine mapping; rind color; ClAPRR2

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 1 期

页码：

收录情况： SCI

摘要： The color of the rind is one of the most crucial agronomic characteristics of watermelon (Citrullus lanatus L.). Its genetic analysis was conducted to provide the identification of genes regulating rind color and improving the quality of watermelon appearance. In this study, a mapping population of 505 F2 plants, derived from a cross between green (CG058) and light-green (CG265) rinds, along with a high-density genetic linkage (average 0.9 cM distance between bin markers), was used to map and identify possible candidate genes. The green rind trait was determined to be regulated by a single Mendelian locus and was precisely located within a 110 kb genomic site on chromosome nine (Chr 9). In the respective region, two potential genes, Cla97C09G175170 and Cla97C09G175180, were substantially downregulated in the light-green rind in comparison to the green rind. Previous studies revealed that Cla97C09G175170, encoding a two-component response regulator-like protein (APRR2), is possibly involved in the green rind trait in watermelon. Virus-induced gene silencing (VIGS) assay confirmed that ClAPRR2 is a key gene responsible for green rind color. Moreover, qRT-PCR analysis revealed that the transcription levels of multiple key genes in the chlorophyll (Chl) biosynthesis pathway were downregulated in the light-green rind relative to the green rind. The current findings have the potential to clarify the regulatory mechanisms that underlie the color of the watermelon rind. These data would provide valuable insights for the targeted molecular design and development of watermelon rinds.

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