Identification and molecular marker development for peel color gene in melon (Cucumis melo L.)
文献类型： 外文期刊
作者： Ma, Jian 1 ; Yuan, Guoliang 1 ; Xu, Xinyang 2 ; Zhang, Haijun 1 ; Qiu, Yanhong 1 ; Li, Congcong 3 ; Zhang, Huijun 4 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Key Lab Vegetable Biobreeding, Key Lab Biol & Genet Improvement Hort Crops North, Minist Agr & Rural Affairs,Beijing Vegetable Res C, Beijing 100097, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Vegetables, Hangzhou 310021, Peoples R China
3.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China
4.Huaibei Normal Univ, Sch Life Sci, Huaibei 235000, Peoples R China
关键词： melon; BSA-seq; mapping; CmAPRR2; peel color; KASP marker
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.4； 五年影响因子：4.8 ）
ISSN： 2095-3119
年卷期： 2025 年 24 卷 7 期
页码：
收录情况： SCI
摘要： Peel color is an important appearance quality of melons that significantly affects consumer preferences. In this study, a near-isogenic line NIL-G (dark green peel) was generated from B8 (grey-green peel) and B15 (white peel). The F2 population constructed by crossing NIL-G and B15 was used to study the inheritance pattern of peel color, and bulked-segregant analysis sequencing (BSA-seq) was employed to identify the interval in which the target gene was located. Genetic analysis showed that a dominant gene controls the dark green peel trait at maturity. BSAseq and molecular markers were used to localize the candidate gene in a 263.7 kb interval of chromosome 4, which contained the CmAPRR2 gene with known functions. Moreover, allelic sequence analysis revealed four SNP variations of the CmAPRR2 gene in B15, of which SNP.G614331A was located at the junction of the 6th exon and 6th intron. The G-to-A mutation caused alternative splicing of the transcript of CmAPRR2 in B15, generating two transcripts (CmAPRR2-A and CmAPRR2-B) with premature termination codons. Furthermore, the Kompetitive Allele Specific POR (KASP) marker, APRR2-G/A, was developed based on this SNP and shown to co-segregate with the peel color phenotype in the F2 population. Compared to white-peel B15, the expression level of CmAPRR2 in dark green peel NIL-G was higher at each growth stage. Therefore, CmAPRR2 may be the key gene controlling the fruit color of melons. This study identified a novel allelic variant of CmAPRR2 that leads to white peel formation in mature melons. We also provides a theoretical basis for further research on the gene regulatory mechanism of melon peel colors, which promotes using molecular marker-assisted selection to modify melon peel colors in the future.
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