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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2000;13(9): 1189-1192.
DOI: https://doi.org/10.5713/ajas.2000.1189    Published online September 1, 2000.
A Study of Some Economic Traits of Indigenous Cattle and their Crossbreeds in Southern Bangladesh
A. Ashraf, S. S. Islam, A. B. M. M. Islam, S. Z. Ali
The experiment was conducted on 69 cows to identify the quantitative variations of some economic traits of five genetic groups as Local횞Friesian F1, Local횞Sahiwal F1, Local (indigenous zebu type), Local횞Sindhi F1, and Local횞Hariana F1. The traits studied were age at weaning, age at first heat, age at first conception, services per conception, daily milk yield, lactation length, lactation yield and post partum heat period. The records on milking and reproduction performances of cows and heifers were obtained from farm register and by interviewing the farmers. It was observed that the lowest age at weaning, age at first heat and age at first conception were 5.37 0.24, 27.17 1.72 and 27.83 1.82 months respectively in Local횞Hariana F1. Services per conception were lowest in Local횞Sahiwal F1 (1.08 0.18) although not significantly (p>0.05) affected by farms, genetic groups and farm횞genetic groups interaction. Average daily milk yield was highest in Local횞Friesian F1 (5.81 0.40 kg). Lactation length and lactation yield were highest in Local횞Sahiwal F1 (299.38횞9.74 days and 1863.00 141.00 kg respectively). Average post partum heat period was lowest in Local횞Sindhi F1 (3.19 0.38 months). Least squares ANOVA showed that farm had significant (p<0.001) effect on age at weaning, age at first heat, age at first conception and post partum heat period. There was insignificant (p>0.05) effect of farm on services per conception, daily milk yield, lactation length and lactation yield, whereas genetic groups had a significant effect for all the traits under review except services per conception. Farm횞genetic groups interaction was insignificant for all of the traits under consideration except age at weaning.
Keywords: Performance; Indigenous; Crossbred; Crossbred

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