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Linkage map of Lissotriton newts and the genetic basis of reproductive isolation

Linkage map of Lissotriton newts and the genetic basis of reproductive isolation

Linkage maps facilitate the study of the genetic architecture of reproductive isolation. We constructed a map for newts of the Lissotriton vulgaris species complex: 1146 protein-coding genes on 12 linkage groups, equal to the haploid chromosome number, with a total length of 1484 cM. A complex pattern of transmission ratio distortion (TRD) was detected, consistent with environment-dependent mortality of individuals carrying L. montandoni alleles in two genomic segments; this suggests a role of TRD blocks in reproductive isolation. The linkage map will empower studies on the genomic architecture of divergence and interactions between the genomes of hybridizing newts.

http://www.g3journal.org/content/7/7/2115