GENETIC PARAMETERS ESTIMATES OF PREWEANING GARUT SHEEP IN UPTD-BPPTDK MARGAWATI GARUT

Abstrak

The development of local genetic resources is important to supply the lamb meat which has the high demand
in Indonesia especially West Java, through the selection of Garut Sheep superior breeds. This study was addressed to estimate the genetic parameters of Garut Sheep pre-weaning traits. The traits were analyzed on this study were birth weight (W0), 30, 60, 90 days weight (W30, W60, W90) and weaning weight on 100 days (W100) of Garut Sheep in UPTD-BPPTDK Margawati Garut from 104 sires, 1,809 dams, 2,921 rams, and 2,632 ewes. The total of analyzed records was 27,019 records consists of 6,559 W0 records, 5,702 W30 records, 5,248 W60 records, 4,843 W90 records, and 4,667 W100 records from 2012 – 2019. The data was analyzed Restricted Maximum Likelihood (REML) to estimate the heritability using Variance Components Estimation (VCE) 6.0 software, with maternal genetic effect (m2) and common environment (c2) model. The fixed effects that included in the analysis were sex and birth type. The results showed that the heritability of W0, W30, W60, W90, and W100 using maternal genetic effect and common environment model were 0.133±0.04, 0.108±0.03, 0.099±0.03, 0.122±0.03, 0.123±0.03, and it means the heritabilities were in the low category. The maternal genetic effect and common environment values of Garut Sheep W0, W30, W60, W90, and W100 were 0.095 ± 0.03, 0.163 ± 0.03, 0.137 ± 0.03, 0.113±0.02, 0.115±0.02 and 0.455±0.16, 0.268±0.13, 0.274±0.13 0.269±0.13 0.278±0.12. It showed that the genetic parameters were more accurate if the analysis involved the maternal genetic effect and common environment.