Journal
SCIENTIA HORTICULTURAE
Volume 202, Issue -, Pages 25-31Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2016.01.004
Keywords
Watermelon; CAPS; SSR; Molecular marker; Genetic map; QTL; Fruit shape; Sugar
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Funding
- National Nature Science Foundation of China [31272186]
- China Agriculture Research System [CARS-26-02]
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A genetic map of watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai] was constructed using an F-2:3 segregating population consisting of 145 individuals, which were derived from a cross between a cultivated inbred line (garden female parent) from China and an American inbred line (LSW-177). The map contained 125 polymorphic markers, comprising 82 cleavage amplified polymorphic sequence (CAPS) markers and 43 simple sequence repeat (SSR) markers. The map contained 11 major and 3 minor linkage groups spanning a total length of 1,244.5 cM, with an average of 9.96 cM between markers. All of the CAPS markers were newly developed based on high-throughput re-sequencing data for the garden female parent and LSW-177. A quantitative trait locus (QTL) analysis was conducted using the composite interval mapping method to locate fruit sugar content and fruit shape traits. A total of 10 QTLs were identified; 4 for fruit sugar content and 6 for fruit shape. This map and QTL analysis will be useful for breeding to improve various economic traits in watermelon. (C) 2016 Published by Elsevier B.V.
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