数字农科院2.0

Screening for Resistant Germplasms and Quantitative Trait Locus Mapping of Resistance to Tomato Chlorosis Virus

文献类型： 外文期刊

作者： Wenzheng Gao;Zhirong Wang;Chenchen Dong;Kai Wei;Yifan Chen;Zhuoyao Qiu;Ziteng Liu;Xin Li;Lei Liu;Yongchen Du;Zejun Huang;Junming Li;Xiaoxuan Wang

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关键词： germplasm;QTL;resistance identification;RNA-seq;tomato chlorosis virus

期刊名称： International Journal of Molecular Sciences

ISSN： 1661-6596

年卷期： 2025 年 26 卷 5 期

页码：

收录情况： SCIE（2025版）

摘要： Tomato chlorosis virus (ToCV) is an emerging plant virus that poses a substantial threat to the cultivation of economically vital vegetable crops, particularly tomato (Solanum lycopersicum). Despite its substantial impact on crop yield, resistant or tolerant tomato germplasms have not been well documented, and the genetic basis of resistance to ToCV remains poorly understood. In this study, two wild accessions that were immune to ToCV and five accessions that were highly resistant to ToCV were identified from 58 tomato accessions. Additionally, a novel method was developed for evaluating resistance to ToCV in tomatoes, and it was observed that tomatoes exhibited typical pathological features on days 15 and 30 after ToCV inoculation, referred to as Stage 1 and Stage 2, respectively. Using quantitative trait locus (QTL) sequencing in conjunction with classical QTL approaches, ToCV resistance loci were identified in two F2 populations derived from the crosses between SG11 (susceptible) and LA1028 (resistant) and between SP15 (susceptible) and LA0444 (resistant). Genetic analysis indicated that resistance to ToCV in the wild-type ToCV-resistant tomato accessions LA1028 and LA0444 was quantitative and mainly governed by four loci (Qtc1.1 and Qtc11.1 from LA1028 and Qtc7.1 and Qtc9.1 from LA0444). Subsequently, transcriptome analysis of three resistant accessions (LA2157, LA0444, and LA1028) and two susceptible accessions (SG11 and SP15) revealed unique differentially expressed genes and specific biological processes in the two stages of ToCV infection. This study provides new resistant germplasms and potential genetic resources for ToCV resistance, which can be valuable in tomato molecular breeding programs in obtaining resistant varieties.

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