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Dissection of quantitative traits by bulk segregant mapping in a protoploid yeast species.

TitleDissection of quantitative traits by bulk segregant mapping in a protoploid yeast species.
Publication TypeJournal Article
Year of Publication2016
AuthorsSigwalt, A, Caradec, C, Brion, C, Hou, J, de Montigny, J, Jung, P, Fischer, G, Llorente, B, Friedrich, A, Schacherer, J
JournalFEMS Yeast Res
Date Published2016 Jul 2
ISSN1567-1364
Abstract

Since more than a decade ago, Saccharomyces cerevisiae has been used as a model to dissect complex traits, revealing the genetic basis of a large number of traits in fine detail. However, to have a more global view of the genetic architecture of traits across species, the examination of the molecular basis of phenotypes within non-conventional species would undoubtedly be valuable. In this respect, the Saccharomycotina yeasts represent ideal and potential non-model organisms. Here we sought to assess the feasibility of genetic mapping by bulk segregant analysis in the protoploid Lachancea kluyveri (formerly Saccharomyces kluyveri) yeast species, a distantly related species to S. cerevisiae For this purpose, we designed a fluorescent mating-type marker, compatible with any mating-competent strains representative of this species, to rapidly create a large population of haploid segregants (> 10(5) cells). Quantitative trait loci can be mapped by selecting and sequencing an enriched pool of progeny with extreme phenotypic values. As a test bed, we applied this strategy and mapped the causal loci underlying halotolerance phenotypes in L. kluyveri Overall this study demonstrates that bulk segregant mapping is a powerful way for investigating the genetic basis of natural variations in non-model yeast organisms and more precisely in L. kluyveri.

DOI10.1093/femsyr/fow056
Alternate JournalFEMS Yeast Res.
PubMed ID27371856