Article
Genetic parameters for female fertility traits and a fertility index in Spanish dairy cattle.
Journal of dairy science - 1 Sept 2005
González-Recio O, Alenda R
Abstract excerpt
Genetic correlations among female fertility traits (linear and binary) were estimated using 225,085 artificial insemination records from 120,713 lactations on 63,160 Holstein cows. Fertility traits were: calving interval, days open, a linear transformation of days open, days to first insemination, interval between first and last insemination, number of inseminations per service period, pregnancy within 56 and 90...
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