Authors: Ankush Prashar Csaba Hornyik Vanessa Young Karen McLean Sanjeev Kumar Sharma M Finlay B Dale Glenn J Bryan
Publish Date: 2014/08/27
Volume: 127, Issue: 10, Pages: 2159-2171
Abstract
This paper reports the construction of a genetic map of a highly heterozygous fullsib diploid potato population 06H1 based on the use of a set of 8303 single nucleotide polymorphism SNP markers The map contains 1355 distinct loci and 2157 SNPs 802 of which cosegregate with other markers We find high levels of collinearity between the 12 chromosomal maps with a recently improved version of the potato genome assembly with the expected genetic clustering in centromeric regions The linkage maps are used in combination with highly detailed phenotypic assessments conducted over two growing seasons to perform quantitative trait loci analysis of two important potato traits tuber shape and eye depth The major loci segregating for tuber shape in 06H1 map to loci on chromosomes 2 and 10 with smaller effects mapping to three other chromosomes A major locus for tuber eye depth colocates with the tuber shape locus on chromosome 10 To assess when tuber shape is established in the developing tuber we have performed staged observations of tuber formation Our observations suggest that tuber shape is determined very early in tuber developmentWe gratefully acknowledge the financial support of the The Scottish Government and Mylnefield Research Services We also acknowledge the assistance of the potato field trialling team at The James Hutton Institute We thank Julie Graham and Joanne Russell for critical comments on the manuscript
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