title: High-density linkage mapping and distribution of segregation distortion regions in the oak genome.
abstract: We developed the densest single-nucleotide polymorphism (SNP)-based linkage genetic map to date for the genus Quercus An 8k gene-based SNP array was used to genotype more than 1,000 full-sibs from two intraspecific and two interspecific full-sib families of Quercus petraea and Quercus robur A high degree of collinearity was observed between the eight parental maps of the two species. A composite map was then established with 4,261 SNP markers spanning 742 cM over the 12 linkage groups (LGs) of the oak genome. Nine genomic regions from six LGs displayed highly significant distortions of segregation. Two main hypotheses concerning the mechanisms underlying segregation distortion are discussed: genetic load vs. reproductive barriers. Our findings suggest a predominance of pre-zygotic to post-zygotic barriers.
authors.affiliation: INRA, UMR1202 BIOGECO, F-33610 Cestas, France Université de Bordeaux, UMR1202 BIOGECO, F-33610 Talence, France catherine.bodenes@pierroton.inra.fr.
authors.forename: Catherine
authors.initials: C
authors.lastname: Bodénès
authors.affiliation: INRA, UMR1202 BIOGECO, F-33610 Cestas, France Université de Bordeaux, UMR1202 BIOGECO, F-33610 Talence, France.
authors.forename: Emilie
authors.initials: E
authors.lastname: Chancerel
authors.affiliation: INRA, UMR1202 BIOGECO, F-33610 Cestas, France Université de Bordeaux, UMR1202 BIOGECO, F-33610 Talence, France.
authors.forename: François
authors.initials: F
authors.lastname: Ehrenmann
authors.affiliation: INRA, UMR1202 BIOGECO, F-33610 Cestas, France Université de Bordeaux, UMR1202 BIOGECO, F-33610 Talence, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Kremer
authors.affiliation: INRA, UMR1202 BIOGECO, F-33610 Cestas, France Université de Bordeaux, UMR1202 BIOGECO, F-33610 Talence, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Plomion
mesh_terms: D002874:Chromosome Mapping; D008040:Genetic Linkage; D018745:Genome, Plant; D020641:Polymorphism, Single Nucleotide; D029963:Quercus / Q000235:genetics*
keywords: Quercus; SNP; high-density linkage map; reproductive barriers; segregation distortion