Genetic analysis of production and reproduction traits in Jaffarabadi buffaloes

Abstract

Lactation records of 189 Jaffarabadi buffaloes maintained at Cattle Breeding Farm, JAU, Junagadh, over a period of
20 years (1991-2010) were analysed for genetic analysis of some production and reproduction traits in Jaffarabadi
buffaloes. The production traits included were 300-days milk yield, lactation length and peak yield, and the
reproduction traits were calving interval and dry period to study the effects of non-genetic factors viz. period,
parity and season of calving. Least squares analysis revealed that period of calving had highly significant effect (P≤
0.01) on all the five traits under the study. Season of calving had highly significant effect (P≤0.01) on reproduction
traits, while non-significant effect (P>0.05) on production traits. Parity of calving had highly significant effect (P≤
0.01) on 300-days milk yield and peak yield while non-significant effect (P>0.05) on lactation length, calving
interval and dry period.