Performance data on 136 cows covering 1987 to 1994 were analysed to see the effect of grading-up to Sahiwal at a rural area in Bangladesh. Birth weight, age at puberty, number of services per conception, post partum heat period, average daily milk yield, lactation production, lactation length, average fat and average SNF content of A Sahiwal - lA PMC and 3/« Sahiwal - '/« PMC were used. Effect of genotype was significant for all traits except number of services per conception and post partum heat period whereas sire effect was significant on birth weight, number of services per conception, lactation production and lactation length. For all dairy characters except average SNF, Grade 1 cows were superior than Grade 2 cows. Use of semen with higher sire proof and stabilization of Grade 1 cattle QA Sahiwal - A PMC) at this area were suggested.

A. KFH Bhuiyan, S. S Islam, M. S Hussen

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 25: Lactation; growth and efficiency; meat quality; role of exotic breeds in the tropics; design of village breeding programs; n, , 201204, 1998
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