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Tropical Animal Health and Production
Springer Nature
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Abstract: |
This research was aimed to investigate the production and reproduction traits and their genetic parameters of Egyptian buffaloes under subtropical environment. Heritability, phenotypic, and genetic parameters were estimated for productive and
reproduction traits of frst parity This study revealed the averages TMY, 305-dMY, LL, BW, DP, SP, CI, and AFC were
2260, 2150 kg, 271 days, 38.63 kg, 210.50 days, 195.20 days, 586.86 days, and 36.61 months, respectively. The heritability
estimates for productive traits of the frst lactation were 0.61, 0.52, 0.47, 0.20, and 0.23 for TMY, 305-dMY, LL, DP, and BW,
respectively. Heritability estimates for reproductive traits SP, CI, and AFC were 0.07, 0.09, and 0.35, respectively. Genetic
correlations of most of the investigated frst parity traits were positive, with an exception of DP. The genetic correlation was
negative between SP and BW, and between AFC and LL. Phenotypic correlations of the frst parity among all investigated
traits were positive except between DP and TMY, 305-dMY, LL, BW, and AFC. High and moderate heritability estimates
indicated that the opportunity of genetic upgrading of these parameters could be achieved owing to sire selection. Selection
for high milk yield will be associated with genetic improvement in lactation period and birth weight.
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