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Estimates of genetic and phenotypic parameters of some weight and fleece traits in a coarse-wool breed of sheep

Published online by Cambridge University Press:  27 March 2009

R. A. Guirgis ,
E. A. Afifi  and
E. S. E. Galal
R. A. Guirgis
Affiliation:
Department of Animal Production, Desert Institute, Matareya, Cairo, Egypt
E. A. Afifi
Affiliation:
Department of Animal Production, Desert Institute, Matareya, Cairo, Egypt
E. S. E. Galal
Affiliation:
Department of Animal Production, Desert Institute, Matareya, Cairo, Egypt
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Summary

A study using 1150 lambs to estimate genetic and phenotypic parameters of some weight and fleece traits was carried out on coarse-wool Barki sheep. The weight traits were birth, weaning, yearling weights and daily gains whereas fleece traits included kemp score, staple length and greasy-fleece weight.

Heritability estimates of weight traits were within the range 0·25–0·30. Those of fleece traits were 0·16, 0·21 and 0·43. The repeatability estimates of fleece traits were 0·18, 0·38 and 0·53 for staple length, greasy-fleece weight and kemp score respectively.

Phenotypic correlations between body weight and fleece traits were mostly positive. Genetic correlations between greasy-fleece weight and body weights were mostly positive and of medium values. Those between kemp score and body weights were mostly negative, ranging from medium-high to high.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 99 , Issue 2 , October 1982 , pp. 277 - 285
Copyright
Copyright © Cambridge University Press 1982

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