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Prof. Maher Hasab El-Nabi Khalil :: Publications:

Title:
Genetic aspects for milk traits in Saudi camels - 2007
Authors: Khalil M.H., Al-Sobayil K.A., Al-Saef A.M., Mohamed K.M., Salal S.A.
Year: 2007
Keywords: Saudi camels, Animal model, genetic evaluation, heritabilities, lactation, permanent environment.
Journal: Journal of Camel Practice and Research,
Volume: 14
Issue: 1
Pages: 55-59
Publisher: Camel Publishing House, Bikaner, India
Local/International: International
Paper Link:
Full paper Maher Hasab El-Nabi Khalil_2007 - Genetic aspects for milk traits in Saudi camels.pdf
Supplementary materials Not Available
Abstract:

A 269 lactation records for Saudi she-camels were genetically analysed and evaluated for lactation traits of milk yield of the first three months or lactation, annual milk yield, total milk yield, length of lactation period, monthly milk yield, and daily milk yield. Data were analysed using DFREML procedure to estimate direct additive effects (Le_ direct heritabilites), permanent environment and random errors_ Breeding values of camels with and without records in this population were predicted for lactation itS using an animal model. Heritahilities were moderate and ranged from (108 to 0,25. Ratios or permanent environment were also moderate and ranged from 0,16 to 0,22. The ranges in breeding values for the animals with and without records were moderate or high, e.g. I 66.8 kg, 1312 kg, 1436 kg, 282 day, 121.2 kg, and 3.044 kg for 3-month milk yield, annual milk yield, total milk yield, lactation period, monthly milk yield, and daily milk yield, respectively. Accuracies of breeding values recorded for lactation traits were high and ranged 0.42 to 0.76. The percentage of animals that had positive estimates of breeding values for all traits were nearly similar and ranged 53.3 to 57.30%. The rates of selection responses predicted were moderate or high where these rates were ranged from 3.1 to 9.6% relative to the actual mean of the trait.

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