Abstract

Live weight of beef-cross-dairy calves during the first year of life N.P. Martín1, N.M. Schreurs1, S.T. Morris1, J.L. McDade2, L.W. Coleman1 & R.E. Hickson1 1 School of Agriculture, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand n.p.martin@massey.ac.nz (Corresponding Author) 2 Greenlea Premier Meats Ltd, P.O. Box 87, Hamilton 3240, New Zealand The use of genetically superior beef sires has the potential to increase the production of high-value meat products from surplus calves born in the dairy industry. The aim of this experiment was to evaluate the 200-day and 400-day live weight of Angus- and Hereford-sired calves born to dairy cows, to calculate the heritability of live weight and to analyse the relationship between progeny live weight and their sires’ EBV for live weight at 200 and 400 days of age. Live weight was similar for Angus- and Hereford-sired calves, and steers were heavier than heifers at 200 days and 400 days. Heritability of live weight at 200 days was 0.27 and at 400 days was 0.25, indicating significant potential for increasing live weight of beef-cross-dairy calves through genetic selection. Sires for this system should be selected by their EBV for live weight at 400 days. Keywords: dairy-beef, crossbreed, live weight, heritability, breeding value

Natalia Martin, Nicola Schreurs, Steve Morris, Julie McDade, Lucy Coleman, Rebecca E Hickson

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Biology - Growth and Development, , 697, 2018
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