Abstract

Genetic Analysis of Udder Conformation Traits derived from AMS Recording in Dairy Cows B.J. Ducro1, H.W.M. Poppe1, H.A. Mulder1, G. de Jong2 1 Wageningen University & Research Animal Breeding and Genomics, PO Box 338, 6700 AH Wageningen, the Netherlands 2 CRV BV, Wassenaarweg 20, 6843 NW Arnhem, The Netherlands Bart.Ducro@wur.nl Summary Automatic Milking Systems (AMS) allow recording of alternative udder conformation traits. The aim of this study was to estimate genetic parameters for udder conformation based on teat coordinates and to genetically compare udder conformation across parities. Records were obtained from 70 commercial dairy farms in the Netherlands. Heritabilities ranged between 0.40 and 0.69 and repeatabilities within parity were 0.89 and higher. Genetic correlations across parities were 0.94 and higher, except for udder balance between parity 1 and 3. AMS recordings offer good opportunities to breed for improved udder conformation in first and higher parities. Keywords: udder conformation, automatic milking system, genetics

Bart Ducro, Marieke Poppe, Han Mulder, Gerben de Jong

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Biology & Species - Bovine (dairy) 2, , 479, 2018
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