2021 journal article
The recombination landscape and multiple QTL mapping in a Solanum tuberosum cv. 'Atlantic'-derived F-1 population
HEREDITY, 126(5), 817–830.
MeSH headings : Phenotype; Plant Breeding; Plant Tubers; Quantitative Trait Loci; Recombination, Genetic; Solanum tuberosum / genetics
TL;DR:
Genetic analyses of an F1 population derived from a cross involving ‘Atlantic’, a widely grown chipping variety in the USA, find those on chromosome 5 that have been previously implicated in maturity (StCDF1) and tuber formation (POTH1).
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open access via www.nature.com (publisher PDF)
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13. Climate Action
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14. Life Below Water
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15. Life on Land
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Source: Web Of Science
Added: March 29, 2021
AbstractThere are many challenges involved with the genetic analyses of autopolyploid species, such as the tetraploid potato,Solanum tuberosum(2n = 4x = 48). The development of new analytical methods has made it valuable to re-analyze an F1population (n = 156) derived from a cross involving ‘Atlantic’, a widely grown chipping variety in the USA. A fully integrated genetic map with 4285 single nucleotide polymorphisms, spanning 1630 cM, was constructed with MAPpoly software. We observed that bivalent configurations were the most abundant ones (51.0~72.4% depending on parent and linkage group), though multivalent configurations were also observed (2.2~39.2%). Seven traits were evaluated over four years (2006–8 and 2014) and quantitative trait loci (QTL) mapping was carried out using QTLpoly software. Based on a multiple-QTL model approach, we detected 21 QTL for 15 out of 27 trait-year combination phenotypes. A hotspot on linkage group 5 was identified with co-located QTL for maturity, plant yield, specific gravity, and internal heat necrosis resistance evaluated over different years. Additional QTL for specific gravity and dry matter were detected with maturity-corrected phenotypes. Among the genes around QTL peaks, we found those on chromosome 5 that have been previously implicated in maturity (StCDF1) and tuber formation (POTH1). These analyses have the potential to provide insights into the biology and breeding of tetraploid potato and other autopolyploid species.