Morphometric comparison of linear body size of IPB D1 chickens and native chickens through discriminant analysis

Animal protein production from chickens predominantly comes from purebred chicken farms rather than local ones. Improving the genetic quality of local chickens in Indonesia can be achieved through developing IPB D1 chickens. This study aims to identify distinguishing variables between IPB D1 chickens and native chickens using linear body measurements through discriminant analysis. The research involved IPB D1 chickens and native chickens in the layer phase, employing descriptive statistical analysis, T2-Hotelling, Fisher linear discriminant analysis, and Wald-Anderson classification. Results showed that IPB D1 roosters and native roosters differ in femur length (X1), tarsometatarsus circumference (X4), maxilla length (X7), and comb height (X8) with a morphometric dissimilarity of 2.06. IPB D1 hens and native hens differ in tarsometatarsus circumference (X4) and wing length (X6), with a morphometric dissimilarity of 1.41. The Wald-Anderson classification, based on natural selection, suggests removing particular chickens that are not classified as IPB D1 and native chickens from their respective groups to produce chickens that match their characteristics.