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Journal of Biological Sciences

Year: 2004 | Volume: 4 | Issue: 4 | Page No.: 452-455
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Authors

Ali Reza Ahmed

Sarder Safiqul Islam

Nargis Khanam

Ayesha Ashraf

Keywords

Research Article

Genetic and Phenotypic Parameters of Milk Production Traits of Crossbred Cattle in a Selected Farm of Bangladesh

Ali Reza Ahmed, Sarder Safiqul Islam, Nargis Khanam and Ayesha Ashraf
The study was conducted in Milk and Cattle Improvement Farm, Bogra, Bangladesh from 1995 to 2003 with a view to estimate genetic and phenotypic parameters of milk production traits of crossbred cattle. The milk production traits considered in the study were lactation length, yield per lactation, pick yield per day and daily milk yield. Heritability was calculated from parental half-sib relationship. The average mean of lactation length, yield per lactation, pick yield per day and daily milk yield were 338.19 ± 9.98 days, 1336.88 ± 60.23, 6.02 ± 0.17 and 3.93 ± 0.12 kg, respectively. The heritability estimates of lactation length, yield per lactation, pick yield per day and daily milk yield were 0.028 ± 0.01, 0.44 ± 0.10, 0.24 ± 0.08 and 0.20 ± 0.07, respectively, where the repeatability estimates of those traits were 0.10 ± 0.09, 0.14 ± 0.09, 0.36 ± 0.10 and 0.35 ± 0.10, respectively. The effects of genetic groups on various traits were non-significant except lactation length (P<0.01). The effects of parity on all traits under consideration were non-significant.
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