Author(s): Sonali Subhash Jadhavar, Dr. SD Mandakmale, Dr. DK Deokar, Dr. US Gaikwad and Dr. MG Mote

Abstract: The relevant data were collected from the history and pedigree sheets maintained at Research Cum Development Project on Cattle, M.P.K.V, Rahuri.(MS) for the period of 30 years (1990 to 2020) on lifetime traits of Phule Triveni and halfbreds. The data were classified into different seasons and periods and the data spred over 30 year duration were classified into total 8 period of calving of 3 year each. In order to overcome non rectiliniar of the data due to unequal subclass frequencies, least square techniques (Harvey 1990) ^[10] was used to examine by using different effect of non genetic factors. The results acheived in the present study of the overall least square means of herd life in IH, PT and R group were 3340.11±114.06 days, 2909.67±98.16, 3308.31±180.17 days respectively. The overall least squares means of productive life in IH, PT, R group were 1660.26±89.76 days, 1352.71±68.58days, 1378.72±106.68 days respectively. The period of calving had significant influence on herd life and productive life in all the genetic group of Gir crossbreds , while the season of calving had non significant influence on the herd life and productive life in all genetic group.

DOI: 10.33545/26174693.2024.v8.i3Si.857