KAJIAN APLIKASI TEKNIK INSEMINASI BUATAN DALAM PENINGKATAN GENETIK BOBOT BADAN TERNAK SAPI PERANAKAN ONGOLE DI SULAWESI UTARA

Abstract

THE STUDY OF ARTIFICIAL INSEMINATION APPLICATION ON GENETIC IMPROVEMENT OF LIVE WEIGHT IN ONGOLE GRADE CATTLE AT NORTH SULAWESI PROVINCE. This research was conducted to evaluate the effective application of artificial insemination compared with natural breeding on genetic improvement by grading up system involving semen sourced from Ongole bull for the Indonesian-grade cattle at rural areas in Minahasa regency of North Sulawesi province, Indonesia. Data on animal live weight were collected from all cows (n= 404) kept by the traditional household farmers. Data of the cows were corrected by adjusting for the six years old of age. Breeding of beef genetic ancestors used the natural breeding (NB) and the artificial insemination (AI), divided into three cow groups with the first group of NB-mating without grading up (G0 cows), the second group of AI-mating with grading up using semen of Ongole bull for the first generation (G1 cows), and the third group of AI-mating with grading up using semen of Ongole bull for the second generation (G2 cows). The genetic improvements from breeding program of each G0, G1 and G2 were analyzed involving the selection intensity (i), the accuracy of selection (r), the genetic standard deviation of the trait under selection (SDg), and the generation interval (L) expressed in years. Results of this study showed that the critical components was the genetic development of local beef cattle by grading up using semen of the selected elite Ongole bull mated by AI method producing G2 in North Sulawesi province of Indonesia. This method increased genetically four hundred percents of live weight per year under 48% to 10% proportions of elite cows at the truncation points from the animal population compared with those of the natural mating of G0 in increasing genetic development for animal genetically live weight per year.

Key Words: artificial insemination, genetic development, Indonesian local-grade cattle, Ongole breed bull