Comparative Evaluation of Heritability Value and Non Genetic Factor Affecting Reproduction Traits in Peranakan Ongole(PO) Cattle
A. Gunawan a*, A. Iriantoa, R. S. Harahap a, N. Azmi a K. Listyarini a, M.F. Ulumb & Muladnoa
aDepartment of Animal Production and Technology, Faculty of Animal Science,
IPB University
bDepartment of Veterinary Clinic Reproduction and Pathology, Faculty of Veterinary Medicine, IPB University.
Jl. Agatis, Kampus IPB Darmaga Bogor 16680, Indonesia
Abstract
Evaluation of genetic such as heritability value and non-genetic fator of reproductive traits play important to improve the breeding and management practices in beef cattle. This study was carried out to evaluate heritability value and non genetic factors affecting reproductive traits in Ongole grade cattle. A total 553 records reproductive triats inculding of age first calving (AFC), calving interval (CI), days open (DO) of cows distributed over a period of 8 years (2012 to 2019) were used to estimate 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 the Statistical Analysis System (SAS) version 9.4 was used to determine non genetic factors. The overall means for AFC, CI and DO were 39.62±0.39 months, 393.81±2.85 days, 84.29±0.34% , respectively. The results showed that AFC, CI and DO were significantly (P<0.01) influenced by mating system but sex, parity, year of birth had no significant (P>0.05) effect. With regard to AFC, season affected AFC of ongole grade. Estimation of heritability AFC, CI and DO were 0.28±0.026; 0.46±0.007 and 0.21±0.040 respectively. It might be concluded that an improvement in Ongole grade cattle reproductive traits is possible through improving genetic merit by selection criteria using genetic paramters and utilisation of controlled breeding techniques.
Keywords: Non genetic, heritability, reproduction traits, Ongole
Topic: Breeding and livestock production