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- W3100589107 abstract "High density linkage maps are an important tool to gain insight into the genetic architecture of traits of evolutionary and economic interest, and provide a resource to characterise variation in recombination landscapes. Here, we used information from the cattle genome and the 50K Cervine Illumina BeadChip to inform and refine a high density linkage map in a wild population of red deer ( Cervus elaphus ). We constructed a predicted linkage map of 38,038 SNPs and a skeleton map of 10,835 SNPs across 34 linkage groups. We identified several chromosomal rearrangements in the deer lineage, including six chromosome fissions, one fusion and two large inversions. Otherwise, our findings showed strong concordance with map orders in the cattle genome. The sex-averaged linkage map length was 2739.7cM and the genome-wide autosomal recombination rate was 1.04cM per Mb. The female autosomal map length was 1.21 longer than that of males (2767.4cM vs 2280.8cM, respectively). Sex differences in map length were driven by markedly high female recombination rates in peri-centromeric regions, a pattern that is unusual relative to other mammal species. This effect was more pronounced in fission chromosomes that would have had to produce new centromeres. We propose two hypotheses to explain this effect: (1) that this mechanism may have evolved to counteract centromeric drive associated with meiotic asymmetry in oocyte production; and/or (2) that sequence characteristics suppressing recombination in close proximity to the centromere may not have yet evolved at the neo-centromeres. Our study provides insight into how recombination landscapes vary and evolve in mammals, and will provide a valuable resource for studies of evolution, genetic improvement and population management in red deer and related species." @default.
- W3100589107 created "2020-11-23" @default.
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- W3100589107 date "2017-04-06" @default.
- W3100589107 modified "2023-09-26" @default.
- W3100589107 title "Sexual dimorphism in recombination landscape in red deer (Cervus elaphus): a role for meiotic drive?" @default.
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