1. Department of Animal Genetics and Reproduction, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta, Indonesia.
2. Department of Animal Nutrition, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta, Indonesia.
3. Department of Animal Production, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta, Indonesia