Chromosome rearrangements, recombination suppression, and limited segregation distortion in hybrids between Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) and rainbow trout (O. mykiss)

: Ostberg CO, Hauser L, Pritchard VL, Garza JC, Naish KA

Publisher: BIOMED CENTRAL LTD

: 2013

BMC Genomics

: BMC GENOMICS

: ARTN 570

: 14

: 570

: 16

: 1471-2164

DOI: https://doi.org/10.1186/1471-2164-14-570

Conclusions: Chromosome rearrangements suppressed recombination in the hybrids. This result supports several previous findings demonstrating that recombination suppression restricts gene flow between chromosomes that differ by arrangement. Conservation of synteny and map order between the hybrid and rainbow trout maps and minimal segregation distortion in the hybrids suggest rainbow and Yellowstone cutthroat trout genomes freely introgress across chromosomes with similar arrangement. Taken together, these results suggest that rearrangements impede introgression. Recombination suppression across rearrangements could enable large portions of non-recombined chromosomes to persist within admixed populations.