9. GENETIC AND NON-GENETIC FACTORS AFFECTING REPRODUCTION TRAITS IN MEHSANA BUFFALOES by G. A. PARMAR1, J. P. GUPTA2, D. P. PANDEY3, J. D. CHAUDHARI4, B. M. PRAJAPATI5, R. N. SATHWARA6 AND P. A. PATEL7
The data pertaining to various test day yields in Mehsana buffaloes (12524 lactation production records of 7870 buffaloes) were collected from Dudhsagar Research and Development Association (DURDA), Dudhsagar Dairy, Mehsana for the period from 1986 to 2013. The data were divided into three parities, two seasons viz. least calving (January - June) and most calving (July – December) seasons, three clusters (Based on geographic location where data recording were done in 74 villages), five periods (each of five years) and three age at first calving (AFC) groups. The least squares means for service period and calving interval were 214.64±7.18 days and 512.41±7.02 days. The analysis of variance revealed that parity of lactation, season of calving, period of calving and age at first calving group had highly significant (P≤0.01) effect on these traits, however clusters had non-significant effect on service period (SP) in Mehsana buffaloes. The h2 estimates for service period and calving interval were 0.06±0.02 and 0.05±0.0. Repeatability estimates for service period and calving interval were 0.02±0.33 and 0.07±0.30.
KEY WORD: Heritability, Mehsana buffaloes, Non-genetic factors, Repeatability.