Investigating novel traits in single trait selection for their potential in selection indexes for feed efficiency of crossbred pigs

Authors:

Aldridge M.N., Bergsma R., Calus M.P.L.

Publication date:

27 October 2019

Full title:

Investigating novel traits in single trait selection for their potential in selection indexes for feed efficiency of crossbred pigs

Publishing information:

Proceedings of the 23th meeting of the Association for the Advancement of Animal Breeding and Genetics, 27 October - 1 November 2019, University of New England, Armidale, New South Wales

Abstract:

Here we considered selection on a single trait only, assuming a selection differential of one genetic standard deviation, to determine which novel traits to include in a multi-trait selection index for feed efficiency in crossbred pigs. The mean feed conversion ratio (FCR) is 2.52 (kg/kg), and a decrease of 5.56%, was observed if selection was based on FCR itself. Selection on other traits also reduced FCR but with a lower response: average daily gain (-2.9%), dry matter digestibility (-1.2%), nitrogen excreted (-0.40%), daily feed intake (-0.37%), group daily feed intake (-0.35%), eating time per day (-0.04%), and growth rate with social effect (-0.01%). Selection for the welfare traits increased FCR: joint lesions (0.2%), and total lesion count (0.06%). Further analysis will include additional traits and use selection index theory with multi-trait selection to determine an optimal selection index for feed efficiency.

File(s):