Estimation of genetic parameters of the productive and reproductive traits in Ethiopian Holstein using multi-trait models
Open Access
- 1 November 2017
- journal article
- Published by Asian Australasian Association of Animal Production Societies in Asian-Australasian Journal of Animal Sciences
- Vol. 30 (11), 1550-1556
- https://doi.org/10.5713/ajas.17.0198
Abstract
This study estimated the genetic parameters for productive and reproductive traits. The data included production and reproduction records of animals that have calved between 1979 and 2013. The genetic parameters were estimated using multivariate mixed models (DMU) package, fitting univariate and multivariate mixed models with average information restricted maximum likelihood algorithm. The estimates of heritability for milk production traits from the first three lactation records were 0.03±0.03 for lactation length (LL), 0.17±0.04 for lactation milk yield (LMY), and 0.15±0.04 for 305 days milk yield (305-d MY). For reproductive traits the heritability estimates were, 0.09±0.03 for days open (DO), 0.11±0.04 for calving interval (CI), and 0.47±0.06 for age at first calving (AFC). The repeatability estimates for production traits were 0.12±0.02, for LL, 0.39±0.02 for LMY, and 0.25±0.02 for 305-d MY. For reproductive traits the estimates of repeatability were 0.19±0.02 for DO, and to 0.23±0.02 for CI. The phenotypic correlations between production and reproduction traits ranged from 0.08±0.04 for LL and AFC to 0.42±0.02 for LL and DO. The genetic correlation among production traits were generally high (>0.7) and between reproductive traits the estimates ranged from 0.06±0.13 for AFC and DO to 0.99±0.01 between CI and DO. Genetic correlations of productive traits with reproductive traits were ranged from −0.02 to 0.99. The high heritability estimates observed for AFC indicated that reasonable genetic improvement for this trait might be possible through selection. The h2 and r estimates for reproductive traits were slightly different from single versus multi-trait analyses of reproductive traits with production traits. As single-trait method is biased due to selection on milk yield, a multi-trait evaluation of fertility with milk yield is recommended.Keywords
Funding Information
- Jimma University
- National Artificial Insemination Centre
This publication has 17 references indexed in Scilit:
- Estimation of Genetic and Non-Genetic Parameters of Friesian Cattle under Hot ClimateJournal of Agricultural Science, 2012
- Genetic and environmental parameters for milk production, udder health, and fertility traits in Mexican Holstein cowsJournal of Dairy Science, 2010
- Estimates of genetic parameters for Boran, Friesian, and crosses of Friesian and Jersey with the Boran cattle in the tropical highlands of Ethiopia: milk production traits and cow weightJournal of Animal Breeding and Genetics, 2004
- Genetic Evaluation of First Lactation Traits in Sahiwal Cattle Using Restricted Maximum Likelihood TechniqueAsian-Australasian Journal of Animal Sciences, 2003
- Approximation of reliabilities for multiple-trait model with maternal effects.Journal of Animal Science, 2001
- Genetics of milk yield and fertility traits in Holstein-Friesian cattle on large-scale Kenyan farms.Journal of Animal Science, 2001
- Linear and threshold model genetic parameters for disease, fertility and milk production in dairy cattleAnimal Science, 2000
- Genetic and Phenotypic Parameters for 305-Day Yield, Fertility, and Survival in HolsteinsJournal of Dairy Science, 1998
- Genetic Analysis of reproductive and productive performance of Friesian cattle in KenyaJournal of Animal Breeding and Genetics, 1991
- A review of theoretical aspects in the estimation of breeding values for multi-trait selectionLivestock Production Science, 1986