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

Autor:	R. A. Guirgis, E. A. Afifi, E. S. E. Galal
Rok vydání:	1982
Předmět:	Animal science Wool Genetics Weaning Animal Science and Zoology Heritability Biology Body weight Agronomy and Crop Science Breed
Zdroj:	The Journal of Agricultural Science. 99:277-285
ISSN:	1469-5146 0021-8596
DOI:	10.1017/s0021859600030033
Popis:	SUMMARYA 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.
Databáze:	OpenAIRE
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