The domestication process of tomato ( Solanum lycopersium L.) resulted in very low variability for most agronomic interesting traits. In this work we explore the variability present in an unusual segregating population obtained by selfing a second cycle hybrid to identify and mapping novel Quantitative Trait Loci (QTL) for fruit quality traits. With this aim, a molecular characterization of the population by 130 single nucleotide polymorphism designed from genome sequencing of the parental lines was performed, which resulted in a genetic map and the location of seven novel QTL associated with the inheritance of the fruit quality traits: fruit diameter (R 2 ranging from 0.179 to 0.207), fruit weight (R 2 = 0.171) and fruit shape index (R 2 ranging from 0.179 to 0.341). The analysis through the G - statistic allowed to define the consistence of the novel QTL identified, especially those associated to fruit shape index and fruit diameter. This approach has also led to the identification of new codominant molecular markers flanking the QTL which will be useful in future genetic breeding programs.

中文翻译：

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从番茄第二轮杂交种中分离出的种群允许鉴定果实品质性状的新 QTL

番茄 (Solanum lycopersium L.) 的驯化过程导致大多数农艺性状的变异性非常低。在这项工作中，我们探索了一个不寻常的分离种群中存在的变异性，该种群通过自交第二个循环杂交获得，以识别和绘制水果质量性状的新数量性状位点 (QTL)。为此，通过亲本基因组测序设计的 130 个单核苷酸多态性对种群进行了分子表征，从而产生了遗传图谱和与果实品质性状遗传相关的七个新 QTL 的位置：直径（R 2 范围从 0.179 到 0.207）、果实重量（R 2 = 0.171）和果实形状指数（R 2 范围从 0.179 到 0.341）。通过 G - 统计量的分析允许定义所鉴定的新 QTL 的一致性，尤其是那些与果实形状指数和果实直径相关的 QTL。这种方法还导致了对 QTL 侧翼的新共显性分子标记的鉴定，这将在未来的遗传育种计划中有用。