A genetic map and linkage panel for the large-fruited fresh-market tomato

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Abstract

Genetic maps saturated with genetic markers are useful for genetic research and crop breeding; however, the genetic map for the large-fruited fresh-market tomato (Solanum lycopersicum) has never been constructed, and the recombination frequency between DNA fragments is only partly understood for fresh-market tomato. We constructed a novel fresh-market tomato genetic map by using 3614 single nucleotide polymorphism (SNP) markers and a 93 F2 segregating progeny derived from a cross between two United States large-fruited fresh-market tomato lines. The average distance between markers was less than 1 cM, and substantial recombination densities between markers were observed across the approximate centromere locations. A linkage panel for large-fruited fresh-market tomato was also established using the combined dataset of the genetic map and 58 SNP-genotyped core tomato lines. The allelic information in the linkage panel will be a significant resource for both tomato genetics and future breeding approaches.

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Bhandari, P., & Lee, T. G. (2021). A genetic map and linkage panel for the large-fruited fresh-market tomato. Journal of the American Society for Horticultural Science, 146(2), 125–131. https://doi.org/10.21273/JASHS04999-20

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