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RELATIONSHIP BETWEEN SIRES ESTIMATED BREEDING VALUES FOR FIRST LACTATION AND LIFETIME TRAITS IN HOLSTEIN FRIESIAN CROSSBRED COWS*

A.S. Kharat1, S.V. Kuralkar and S.Z. Ali
Department of Animal Genetics and Breeding, Post Graduate Institute of Veterinary and Animal Sciences (MAFSU), Akola-444 104, India

DOI:
Page Range:
59-61
Article ID:
ARCC1563
Online Published:
Abstract
Data of 432 lactation records of 96 crossbreds cows sired by 5 bulls extending over a period 1980-1997 from Cattle Breeding Farm, Borgaon Manju, Akola (M. S.) were collected. The first lactationtraits are first lactation milk yield (FLMY) and first lactation length (FLL) while lifetime traits arelifetime milk yield (LTMY) and productive life (PL). Best linear unbiased prediction (BLUP) andLeast Square (LS) was used to estimate sires breeding values and the model included sire as randomeffect, season and period of calving as fixed effect. The FLMY showed very high and significant rankcorrelation with FLL (0.99) and LTMY (0.99) by BLUP. The product moment correlation of FLMYwith FLL and LTMY were also high and significant by BLUP. The rank correlation of FLMY withLTMY and PL is high and significant by LS methods also. The high positive and significant rankcorrelation and product moment correlation between FLMY and LTMY indicated that sire can beselected on the basis of FLMY for improvement in LTMY.
Keywords
Sires breeding value, Holstein - Friesian crossbred, Lactation length.
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