Abstract
Estimates of (co)variance and genetic parameters of birth, weaning (205 days) and yearling (365 days) weight were obtained using single-trait animal models. The data were analysed by restricted maximum likelihood, fitting an animal model that included direct and maternal genetic and permanent environmental effects. The data included records collected between 1976 and 2001. The pedigree information extended as far back as early 1960s. The heritabilities for direct effects of birth, weaning and yearling weights were 0.36, 0.29 and 0.25, respectively. Heritability estimates for maternal effects were 0.13, 0.16 and 0.15 for birth, weaning and yearling weights, respectively. The correlations between direct and maternal additive genetic effects were negative for all traits analysed. The results indicate that both direct and maternal effects should be included in a selection programme for all the traits analysed.
| Original language | English |
|---|---|
| Pages (from-to) | 801-806 |
| Number of pages | 6 |
| Journal | Tropical Animal Health and Production |
| Volume | 36 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Nov 1 2004 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Food Animals
- Animal Science and Zoology
Cite this
}
Estimation of Genetic Parameters and Variance Components for Growth Traits of Nguni Cattle in Limpopo Province, South Africa. / Norris, D.; Banga, C.; Benyi, K.; Sithole, B. C.
In: Tropical Animal Health and Production, Vol. 36, No. 8, 01.11.2004, p. 801-806.Research output: Contribution to journal › Article
TY - JOUR
T1 - Estimation of Genetic Parameters and Variance Components for Growth Traits of Nguni Cattle in Limpopo Province, South Africa
AU - Norris, D.
AU - Banga, C.
AU - Benyi, K.
AU - Sithole, B. C.
PY - 2004/11/1
Y1 - 2004/11/1
N2 - Estimates of (co)variance and genetic parameters of birth, weaning (205 days) and yearling (365 days) weight were obtained using single-trait animal models. The data were analysed by restricted maximum likelihood, fitting an animal model that included direct and maternal genetic and permanent environmental effects. The data included records collected between 1976 and 2001. The pedigree information extended as far back as early 1960s. The heritabilities for direct effects of birth, weaning and yearling weights were 0.36, 0.29 and 0.25, respectively. Heritability estimates for maternal effects were 0.13, 0.16 and 0.15 for birth, weaning and yearling weights, respectively. The correlations between direct and maternal additive genetic effects were negative for all traits analysed. The results indicate that both direct and maternal effects should be included in a selection programme for all the traits analysed.
AB - Estimates of (co)variance and genetic parameters of birth, weaning (205 days) and yearling (365 days) weight were obtained using single-trait animal models. The data were analysed by restricted maximum likelihood, fitting an animal model that included direct and maternal genetic and permanent environmental effects. The data included records collected between 1976 and 2001. The pedigree information extended as far back as early 1960s. The heritabilities for direct effects of birth, weaning and yearling weights were 0.36, 0.29 and 0.25, respectively. Heritability estimates for maternal effects were 0.13, 0.16 and 0.15 for birth, weaning and yearling weights, respectively. The correlations between direct and maternal additive genetic effects were negative for all traits analysed. The results indicate that both direct and maternal effects should be included in a selection programme for all the traits analysed.
UR - http://www.scopus.com/inward/record.url?scp=7244232834&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=7244232834&partnerID=8YFLogxK
U2 - 10.1023/B:TROP.0000045966.59590.96
DO - 10.1023/B:TROP.0000045966.59590.96
M3 - Article
VL - 36
SP - 801
EP - 806
JO - Tropical Animal Health and Production
JF - Tropical Animal Health and Production
SN - 0049-4747
IS - 8
ER -