Evaluation of bull prolificacy on commercial beef cattle ranches using DNA paternity analysis.

Abstract

SNP-based DNA testing was used to assign paternity to 5,052 calves conceived in natural service multisire breeding pastures from 3 commercial ranches in northern California representing 15 calf crops over 3 yr. Bulls present for 60 to 120 d at a 25:1 cow to bull ratio in both fall and spring breeding seasons in ∼40 ha or smaller fenced breeding pastures… (More)
DOI: 10.2527/jas.2013-7217

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