Record Details

Growth traits of the Dorper sheep. II. Genetic and phenotypic parameters

CGSpace

View Archive Info
 
 
Field Value
 
Title Growth traits of the Dorper sheep. II. Genetic and phenotypic parameters
 
Creator Inyangala, B.A.O.
Rege, J.E.O.
Itulya, S.
 
Subject SHEEP
GENETICS
KENYA
GROWTH
GROWTH RATE
PHENOTYPES
HERITABILITY
 
Description Data on 969 lambs collected over a 10-year period (1978 to 1987) on Dorper sheep at Ol'Magogo were used in this study. Lamb traits studied were weights from birth to yearling and absolute growth rates between adjacent stages of growth. Heritability estimates from paternal half-sib analysis were: 0.15±0.07, 0.18±0.08, 0.39±0.11, 0.55±0.13, 0.53±0.13, 0.14±0.07, 0.28±0.09, 0.59±0.14, 0.49±0.12 and 0.49±0.12; for birthweight (BIRTHW), adjusted weaning weight (ADJWWT), adjusted six-months weight (ADJSMW), adjusted nine-months weight (ADJNMW), adjusted 12-months weight (ADJTMW), pre-weaning growth rate (GR1), weaning to six months (GR2), six to nine months (GR3), nine to 12 months (GR4), and birth to yearling (OVRGRT), respectively. Post-weaning heritability estimates were generally higher than those for pre-weaning suggesting a lower direct genetic influence early in life. Genetic and phenotypic correlations estimated between weights were mainly positive (0.15 to 0.99 and 0.02 to 0.98, respectively). There were generally high genetic and phenotypic correlations between adjacent weights, between weights and rates of growth, and among growth rates themselves.
 
Date 2016-02-08T09:03:13Z
2016-02-08T09:03:13Z
1992
 
Type Conference Paper
 
Identifier 92-9053-258-0
http://hdl.handle.net/10568/70832
 
Language en