Comparative evaluation of heritability value and non genetic factor affecting reproduction traits in Ongole cross cattle

Abstract

Evaluation of genetic factors such as heritability value and non genetic factors of reproductive traits has a vital role in improving breeding and management practices of beef cattle. The aim of the present study was to evaluate heritability value and non-genetic factors affecting reproductive traits in Ongole grade cattle. Five hundred and fifty-three (553) records of reproductive traits including age at first calving (AFC), calving interval (CI), days open (DO) of cows distributed over a period of 8 years (2012 to 2019) were used to predict genetic and non-genetic parameters. Parity, sex, mating system, season, and year of birth calf were included in the model to estimate their effect on reproductive traits. Heritability estimation was calculated using Mixed Model analysis by SAS 9.4. The General Linear Model (GLM) procedure of SAS program, version 9.4 was used to estimate non-genetic factors. Overall mean values for AFC, CI and DO were 39.62±0.39 months, 393.81±2.85 days, 84.29±0.34, respectively. The results revealed that AFC, CI and DO were significantly (P<0.01) affected by mating system but sex, parity, year of birth had no significant (P>0.05) influence. Concerning AFC, season affected AFC of Ongole grade. Prediction of heritability AFC, CI and DO were 0.28±0.026; 0.46±0.007 and 0.21±0.040, respectively. We might conclude that the improvement of reproductive traits in Ongole grade cattle was possible by improving genetic merit by selection criteria using genetic parameters and utilization of controlled breeding techniques.

Evaluation of parity and its interaction effect with season of calving, period of calving on production and reproduction traits in Hardhenu (Bos taurus × Bos indicus) dairy cattle

“…Gunawan et al. (2020) reported that AFC, CI and DO were non‐significantly ( p > .05) affected by parity and year of birth whereas AFC showed significant association with season of calving. Gunawan et al.…”

“…Dev et al (2021) reported that period of calving had statistically significant effect (p < .05) on all production performance traits except on AFC, SP, CI and DP whereas season of calving had non-significant effect on all the production performance traits except significant effect on AFC, SP, CI and DP and the effect of parity was found to be statistically significant (p < .01, p < .05) on all the traits except on LL, PY, SP and CI. Gunawan et al (2020) reported that AFC, CI and DO were non-significantly (p > .05) affected by parity and year of birth whereas AFC showed significant association with season of calving.…”

Genetic Parameters for Growth Traits in Ongole Grade Cattle

“…Ongole Grade (OG) cattle known as "Sapi PO" is one of the prominent Indonesian cattle breeds. This breed of cattle is originated from crossing between Sumba Ongole cattle (originated from India) and Javanese cattle (Bos javanicus) and is adapted to tropical environments in Indonesia since a hundred years ago [1,2]. The cattle which is predominant breed especially in Java Island and also it spreads in many island in Indonesia, reared primarily for meat production.…”