Estimates of genetic parameters for fertility traits of Australian Holstein-Friesian cattle

Haile-Mariam, M, Morton, JM and Goddard, ME (2003) Estimates of genetic parameters for fertility traits of Australian Holstein-Friesian cattle. Animal Science, 76 1: 35-42.

Author Haile-Mariam, M
Morton, JM
Goddard, ME
Title Estimates of genetic parameters for fertility traits of Australian Holstein-Friesian cattle
Journal name Animal Science   Check publisher's open access policy
ISSN 1357-7298
Publication date 2003-01-01
Sub-type Article (original research)
Open Access Status Not yet assessed
Volume 76
Issue 1
Start page 35
End page 42
Total pages 8
Place of publication Penicuik
Publisher British Soc Animal Science
Language eng
Abstract Fertility data collected on 17131 Holstein-Friesian cows from 158 dairy herds in Australia were used to estimate heritabilities for and correlations among several fertility traits using a sire model. Pregnancy rate (PR), survival (Surv), calving interval (CI), calving to first service interval (CFS), insemination rate (coded as 1 if a cow received a service or 0 otherwise) (InsemR) and first service non-return rate (FNRR) were the main traits analysed in a six-trait model. Among the traits, CFS had the highest h(2) (0.13) and FNRR had the lowest h(2) (0.01). Genetic correlations among the traits were higher than environmental correlations in all cases. The genetic correlations of PR with InsemR, FNRR, CFS, CI and Surv were 0.74, 0.79 and -0.84, -0.57, and 0.67, respectively. The genetic correlation between InsemR and CFS was high (-0.95) indicating that they almost measure the same trait. Analysis of data from cows that did not return to service after the first service despite not being pregnant (so-called 'phantom' cow syndrome) showed that the syndrome is not heritable. The relatively high genetic correlation of PR with traits such as CI and Surv that can be extracted from milk recording data and CFS, FNRR and InsemR that can be obtained from mating data suggests that routine genetic evaluation of sires for daughter fertility based on these traits can be implemented in national selection programs.
Keyword Agriculture, Dairy & Animal Science
correlation
dairy cattle
fertility
genetic parameters
Dairy-cattle
Milk-yield
Cows
Environment
Survival
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Veterinary Science Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 22 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 17 Oct 2007, 23:00:06 EST