Abstract
Meiotic recombination is one of the important phenomena contributing to gamete genome diversity. However, it is not well studied in livestock including cattle. The general objectives of this project were to perform genetic analyses of recombination and PRDM9 alleles and study their implications in dairy cattle breeding. The specific objectives were: 1. Analyze variation in recombination across individuals, breeds, and environments; 1.1.Construct individual-level recombination maps; 1.2.Compare recombination features between bulls held under different environmental conditions in US and Israeli; 2. Examine genetic basis of recombination variation in cattle; 2.1.Characterize PRDM9 alleles and their impacts on total and locus-specific recombination features; 2.2.Validate pedigree-based recombination maps using single sperm sequencing and typing; 3. Investigate the impacts of recombination on dairy cattle breeding; 3.1.Evaluate correlation between recombination and dairy production and health traits; 3.2.Evaluate the benefits of incorporating recombination as novel quantitative trait into genomic selection scheme.
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