Selection Indexes for Genetic Improvement of Preweaning Growth Traits in Friesin Calves in Egypt

Oudah, E.; El-Awady, H. G.

doi:10.3923/pjbs.2006.723.728

Cited by 1 publication

(3 citation statements)

References 13 publications

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“…The heritability (h 2 ) estimates for BW, PWDG and WW of buffalo calves were 0.24, 0.26 and 0.29, respectively (Table 2). These estimates were moderate and comparable to those (0.24, 0.28 and 0.28, respectively) reported by Oudah and El-Awady (2006) for the same traits in Friesian calves. Abu El-Naser (2019) found h 2 estimates were 0.31 and 0.22 for BW and WW, respectively of Egyptian buffaloes.…”

Section: Genetic Parameterssupporting

confidence: 87%

“…The economic values of studied traits were calculated on the basis of the change in the difference between input and output for per unit change in these traits according to the prices of 2016. The difference between expenses and revenues as final actual net profit of the studied traits was used to estimate the economic values as illustrated by Oudah and El-Awady (2006). Thus, the relative economic values for BW, PWDG and WW were 1, 0.007 and 0.84, respectively.…”

Section: The Relative Economic Valuesmentioning

confidence: 99%

“…The number of buffaloes in Egypt is about 3.4 million head (FAO, 2017). Oudah and El-Awady (2006) reported that genetic improvement in preweaning growth traits of Friesian calves could be achieved using multiple traits selection indices. Baker (1974) included that selection index revealed greater genetic improvement of several traits.…”

Section: Introductionmentioning

confidence: 99%

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Expected Genetic Gain for Selection of Preweaning Growth Traits in Egyptian Buffaloes

El-Naser

2020

Journal of Animal and Poultry Production

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Data on 1946 buffalo calves born between 2000 and 2016 at Mahallet Mousa farms belonging to Animal Production Research Institute, were utilized in this study. Genetic parameters of birth weight (BW), preweaning daily gain (PWDG) and weaning weight (WW) were estimated using MTDFREML. The different selection indices for previous traits were constructed by Matlab program. Means of BW, PDWG and WW were 37.40 kg, 493.53 g and 90.37 kg, respectively. The heritability estimates for above-mentioned traits were 0.24, 0.26 and 0.29, respectively. The genetic correlations among the mentioned growth traits were ranged from 0.18 to 0.79. Corresponding phenotypic correlations among same traits were ranged from 0.13 to 0.48. The expected genetic gains for direct selection of BW, PWDG and WW were varied between 0.23 -1.18 kg, 10.80 -23.74 g and 0.50 -3.06 kg, respectively. Comparison among selection indices indicated that the highest expected genetic gains for PWDG (8.73 g) and WW (3.50 kg) were obtained from the index I4 included (PDWG and WW). Moreover, the accuracy of this index was closest to the highest index of accuracy. Thus, selection based on index I4 could be improve the response of aggregate genotype for preweaning growth traits of Egyptian buffalo calves.

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Section: Genetic Parameterssupporting

confidence: 87%

Section: The Relative Economic Valuesmentioning

confidence: 99%