ESTIMASI NILAI HERITABILITAS SERVICE PER CONCEPTION FRIESIAN HOLSTEIN KECAMATAN Diserahkan guna memenuhi sebagian syarat yang diperlukan untuk mendapatkan gelar UNIVERSITAS GADJAH MADA i CALVING INTERVAL PADA INDUK SAPI PERAHDI PT. NAKSATRA KEJORA ROWOSENENG KABUPATEN TEMANGGUNG

The aim of the research was to estimate the heritability of calving interval and service per conception of Friesian Holstein at PT. Naksatra Kejora Rowoseneng, Temanggung, Central Java. The research was used the data record of calving interval from 2006 to 2011, and data record of service per conception from 2006 to 2011. Heritability value was estimate by paternal halfsib correlation method and parent offspring regression method. The results showed that heritability value of calving interval and service per conception that use paternal halfsib correlation method was 0,68±0,66 dan 0,16±0,36. The result heritability value of calving interval and service per conception that use parent offspring regression methode were 0,25±0,26 dan 0,14±0,30. Estimation heritability value of calving interval and service per conception at PT. Naksatra Kejora Rowoseneng Temanggung that use two methode was positive and moderate to high