Scholarlink

<p>Cucumber (<i>Cucumis sativus</i> L.) fruit shape is a critical agronomic trait determining market class and external quality. The YuNyv cucumber, a Beit Alpha type valued for its short, uniform fruits, represents a high-value market segment; however, the genetic basis of its shortened fruit shape remains uncharacterized. In this study, we investigated the inheritance and genetic locus controlling this trait. Segregating F<sub>2</sub> populations were developed from a cross between the shortened-fruit inbred line XNS16-1 (derived from YuNyv) and the elongated South China-type inbred line WI7632. Phenotypic analysis revealed that fruit length (FL), fruit diameter (FD), and the fruit shape index (FSI) are quantitatively inherited traits subject to environmental influence. Bulked segregant analysis (BSA) localized a major-effect quantitative trait locus (QTL) to chromosome 1. Subsequent traditional QTL mapping in two independent seasons confirmed a stable, major-effect QTL, <i>fsi1.1</i>, which explained up to 68.0% of the phenotypic variance for FSI. Comparative analysis showed that this QTL colocalizes with the consensus fruit shape locus <i>CsFS1.2</i>. Sequence alignment of the candidate gene <i>CsaV3_1G039870</i> (<i>CsSUN</i>), which has been previously identified at this locus, revealed a 161-bp deletion in the XNS16-1 allele. Our results suggest that the short fruit shape in YuNyv cucumber is primarily controlled by a loss-of-function mutation in the <i>CsSUN</i> gene. This finding provides a robust molecular marker for the marker-assisted selection of desirable fruit shapes in cucumber breeding programs.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Genetic mapping of the short fruit shape regulating locus in cucumber XNS16-1

  • 期刊论文

  • 发表日期：

    2026年5月26日

查看全文
  • Xiaoxue Wang,
  • Linglong Fu,
  • Senyang Yao,
  • Binjie Zhu,
  • Yachen Xiang,
  • Yuqing Zhou,
  • Hanqiang Liu,
  • Yupeng Pan

摘要

Cucumber (Cucumis sativus L.) fruit shape is a critical agronomic trait determining market class and external quality. The YuNyv cucumber, a Beit Alpha type valued for its short, uniform fruits, represents a high-value market segment; however, the genetic basis of its shortened fruit shape remains uncharacterized. In this study, we investigated the inheritance and genetic locus controlling this trait. Segregating F2 populations were developed from a cross between the shortened-fruit inbred line XNS16-1 (derived from YuNyv) and the elongated South China-type inbred line WI7632. Phenotypic analysis revealed that fruit length (FL), fruit diameter (FD), and the fruit shape index (FSI) are quantitatively inherited traits subject to environmental influence. Bulked segregant analysis (BSA) localized a major-effect quantitative trait locus (QTL) to chromosome 1. Subsequent traditional QTL mapping in two independent seasons confirmed a stable, major-effect QTL, fsi1.1, which explained up to 68.0% of the phenotypic variance for FSI. Comparative analysis showed that this QTL colocalizes with the consensus fruit shape locus CsFS1.2. Sequence alignment of the candidate gene CsaV3_1G039870 (CsSUN), which has been previously identified at this locus, revealed a 161-bp deletion in the XNS16-1 allele. Our results suggest that the short fruit shape in YuNyv cucumber is primarily controlled by a loss-of-function mutation in the CsSUN gene. This finding provides a robust molecular marker for the marker-assisted selection of desirable fruit shapes in cucumber breeding programs.