2001•Unpublished venueRequires access

Estimate of the genetic correlation between calving success and days to calving in Angus females.

DJ Johnston, JM Henshall, Bruce Tier

Abstract

Female fertility records from 16,350 maiden heifers from Australian Angus herds were used to estimate the genetic correlation between calving success and days to calving using a new analytical procedure that accounted for the categorical nature of calving success. Both calving success and days to calving were lowly heritable, 4 and 12 %, respectively with a –0.66 genetic correlation between the two traits. The results indicate that days to calving is likely to be the better trait in a selection program because of its higher heritability, its ease of modelling and also its favourable correlation with calving success.

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Key concepts: Ice calving, Heritability, Genetic correlation, Herd, Biology, Correlation, Animal science, Trait