A genome-wide association study for clinical mastitis in first parity US Holstein cows using single-step approach and genomic matrix re-weighting procedure.

PLoS One · 2015 · PMC4319771 · PMID 25658712

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a positive trendno p-value reported

Examples of direct selection against clinical mastitis through selection indeces can be found in Scandinavian countries, where genetic progress over the last 20 years has shown a positive trend [ 4 , 5 ].

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