Phenotypic and genetic correlations of growth traits in Bali cattle breeding population
Rohmad Setiaji1, Sigit Prastowo1, Dwi Prasetiyo2 and Nuzul Widyas1
1Department of animal science, Universitas Sebelas Maret, Jl. Ir. Sutami 36A Kentingan Jebres Surakarta 57126, INDONESIA
2Bali Cattle Breeding Center (BPTU-HPT Denpasar), Jl. Gurita 3 Pegok Sesetan Denpasar 80223, INDONESIA
Abstract
This study aimed to estimate the phenotypic and genetic correlations of growth traits as selection criteria in Bali Cattle test center populations at Pulukan Breeding Center, Livestock and Forage Feeding Center (BPTU-HPT) Denpasar, Bali. In total 160 records were obtained from calves born between 2013 until 2016. Data collected were birth weight (BW), weaning weight (WW), yearling weight (YW), mature weight (MW) and pedigree. Data were then standardized to be weaning weight at 205 days (WW205), yearling weight at 365 days (YW365) and mature weight at 730 days (MW730). The data obtained were analyzed using univariate and bivariate animal models with REML method. Heritability values (h2) were 0.43 ± 0.12, 0.22 ± 0.12, 0.39 ± 0.15, 0.63 ± 0.18 for BW, WW205, YW365 and MW730 respectively. Phenotypic correlations among variables were vary from low to high; which were 0.16 for BW - WW205, 0.11 for BW - YW365, 0.34 for BW - MW730, 0.61 for WW205 - YW365, 0.25 for WW205 - MW730 and 0.31 for YW365 x MW730. However, the genetic correlation among growth traits were considerably high: BW - WW205 0.53, BW - YW365 0.76, BW - MW730 0.47, WW205 - YW365 0.70, WW205 - MW730 0.48, YW365 - MW730 0.64. Heritability of Bali Cattles- growth traits are categorized as moderate to high, thus selection on these traits are potential to obtain genetic improvement in the population. Phenotypic correlations among traits were considerably low, whereas the genetic correlations spanned between medium to high. These findings implied that other than genetic, improving the farm environment and management could also affect the growth performance of Bali cattle.
Keywords: Bali Cattle, growth traits, heritability, phenotypic correlation, genetic correlation
Topic: General animal production and husbandries (ruminants and non-ruminants)