Genetic Analysis of Reproductive Traits in Bali Cattle Maintained on Range Under Artificially and Naturally Bred

Abstract

The aim of this study was to evaluate genetic analysis including heritability and further phenotypic and genetic trends of reproductive traits in Bali cattle. Reproductive traits studied were age at first calving (AFC), calving interval (CI) and pregnancy rate (PR). Data of reproductive traits were collected from Breeding Centre of Bali Cattle, Denpasar-Bali at the year period of 2000-2007. To evaluate the genetic analysis, heritability were estimated using the Mixed Model Least Squares and Maximum Likelihood procedure. The phenotypic and genetic trends were calculated using regression equation. Estimation of heritability for AFC, CI and PR were 0.22, 0.41 and 0.40, respectively. The phenotypic trend of AFC, CI and PR decreased at an average rate of 1.70 month, 10.4 days and 0.75% per year, respectively. The same pattern was showed for genetic trends for AFC, CI and PR decreased at 0.38 month, 4.25 days and 0.30% per year respectively in the same period. The heritability of reproduction traits in Bali cattle were considered as moderate to high (0.22-0.41) which means that the selection program will be more effective and efficient in improving the genetic merits in Bali cattle.

Bayesian estimates of genetic parameters for reproductive traits in Nellore cows raised on pasture in tropical regions

“…Gunawan et al (2011b) considered that this might be partly a correlated response to selection for increased daily gain. A possible cause of the undesirable trend in gestation length and of the marked fluctuation of values observed for AFC, CI, and DO could be the intense selection to increase productive traits (Lopes et al, 2011;Santos et al, 2012;Lopes et al, 2013), without giving attention to reproductive traits.…”

Genetic and Phenotypic Parameters of Body Weight in Ettawa Grade Goats

“…Body weight showed no definite trend that indicated low degree of R 2 except 18WM for genetic and phenotypic trend. The low degree of genetic progress for body weight can be explained mainly by selection program and this may slow down genetic progress (Gunawan et al, 2011).…”

Complement C3 and anti-testosterone antibody in the 150 kDa Bali cattle (Bos sondaicus/javanicus) subordinate follicular fluid peptide observed using MALDI-TOF/TOF-MS

“…Furthermore, Jarkovska et al (2011) reported that in women with severe ovarian hyper stimulation syndrome, complement C3 was expressed differentially. In our study, the detection of complement C3 in BcFF whether related to the reproductive nature of Bali cattle (Gunawan et al, 2011), challenge the researchers to elucidate what the role of BcFF complement C3 is on the Bali cattle reproductive system. In addition to complement C3, in this study, antitestosterone antibody was also identified in the BcFF.…”

“…Bali cattle are Indonesian native cattle, which has been developed from domesticated banteng, Bos javanicus, Bos banteng (Nijman et al, 2003;Mohamad et al, 2009). Bali cattle are also considered to have moderate to high (0.21-0.41) reproductive heritability, which means that Bali cattle have the potential to be genetically improved through selection programs, with good reproductive management practices (Gunawan et al, 2011).…”