Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives

Bradley J Walmsley; Matthew L Wolcott; W S Pitchford; David Johnston; Stephen Barwick

Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives

Bradley J Walmsley
, Matthew L Wolcott
, W S Pitchford
, David Johnston
, Stephen Barwick

Animal Genetics and Breeding Unit

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

An extended procedure is described for modelling cow liveweight change over the production year for valuing cow liveweight in breeding objectives. The pattern of change, before and after trait change, is able to be approximated from breeder-described variables for any production system. Examination of seven datasets showed cow liveweight changes systematically over age in many herds and breeds. Analyses showed liveweight loss from pre-calving to mating and cow liveweight at mating both change in proportion to the liveweight of the cow pre-calving. Differences in cow liveweight pre-calving are thus larger than are the differences at mating, which affects feed costs in valuing cow liveweight at mating. Adoption of the procedure will increase the precision with which feed cost is associated with cow liveweight in beef cattle breeding objectives.

Original language	English
Title of host publication	Proceedings of the Association for the Advancement of Animal Breeding and Genetics
Editors	Kim Bunter, Tim Byrne, Hans Daetwyler, Susanne Hermesch, Kathryn Kemper, James Kijas, David Nation, Wayne Pitchford, Suzanne Rowe, Matt Shaffer, Alison van Eenennaam
Place of Publication	Armidale, Australia
Publisher	Association for the Advancement of Animal Breeding and Genetics (AAABG)
Pages	13-16
Volume	21
ISBN (Print)	9780646945545
Publication status	Published - 2015
Event	AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics - Lorne, Australia Duration: 28 Sept 2015 → 30 Sept 2015

Conference

Conference	AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics
City	Lorne, Australia
Period	28/09/15 → 30/09/15

Keywords

Animal Breeding

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Walmsley, B. J., Wolcott, M. L., Pitchford, W. S., Johnston, D., & Barwick, S. (2015). Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives. In K. Bunter, T. Byrne, H. Daetwyler, S. Hermesch, K. Kemper, J. Kijas, D. Nation, W. Pitchford, S. Rowe, M. Shaffer, & A. van Eenennaam (Eds.), Proceedings of the Association for the Advancement of Animal Breeding and Genetics (Vol. 21, pp. 13-16). Association for the Advancement of Animal Breeding and Genetics (AAABG). http://www.aaabg.org/aaabghome/AAABG21papers/Walmsley21013.pdf

Walmsley, Bradley J ; Wolcott, Matthew L ; Pitchford, W S et al. / Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives. Proceedings of the Association for the Advancement of Animal Breeding and Genetics. editor / Kim Bunter ; Tim Byrne ; Hans Daetwyler ; Susanne Hermesch ; Kathryn Kemper ; James Kijas ; David Nation ; Wayne Pitchford ; Suzanne Rowe ; Matt Shaffer ; Alison van Eenennaam. Vol. 21 Armidale, Australia : Association for the Advancement of Animal Breeding and Genetics (AAABG), 2015. pp. 13-16

@inproceedings{2c75e355aa344385a93e4197af5c46e8,

title = "Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives",

abstract = "An extended procedure is described for modelling cow liveweight change over the production year for valuing cow liveweight in breeding objectives. The pattern of change, before and after trait change, is able to be approximated from breeder-described variables for any production system. Examination of seven datasets showed cow liveweight changes systematically over age in many herds and breeds. Analyses showed liveweight loss from pre-calving to mating and cow liveweight at mating both change in proportion to the liveweight of the cow pre-calving. Differences in cow liveweight pre-calving are thus larger than are the differences at mating, which affects feed costs in valuing cow liveweight at mating. Adoption of the procedure will increase the precision with which feed cost is associated with cow liveweight in beef cattle breeding objectives.",

keywords = "Animal Breeding",

author = "Walmsley, \{Bradley J\} and Wolcott, \{Matthew L\} and Pitchford, \{W S\} and David Johnston and Stephen Barwick",

year = "2015",

language = "English",

isbn = "9780646945545",

volume = "21",

pages = "13--16",

editor = "Kim Bunter and Tim Byrne and Hans Daetwyler and Susanne Hermesch and Kathryn Kemper and James Kijas and David Nation and Wayne Pitchford and Suzanne Rowe and Matt Shaffer and \{van Eenennaam\}, Alison",

booktitle = "Proceedings of the Association for the Advancement of Animal Breeding and Genetics",

publisher = "Association for the Advancement of Animal Breeding and Genetics (AAABG)",

note = "AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics ; Conference date: 28-09-2015 Through 30-09-2015",

}

Walmsley, BJ, Wolcott, ML, Pitchford, WS, Johnston, D & Barwick, S 2015, Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives. in K Bunter, T Byrne, H Daetwyler, S Hermesch, K Kemper, J Kijas, D Nation, W Pitchford, S Rowe, M Shaffer & A van Eenennaam (eds), Proceedings of the Association for the Advancement of Animal Breeding and Genetics. vol. 21, Association for the Advancement of Animal Breeding and Genetics (AAABG), Armidale, Australia, pp. 13-16, AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28/09/15. <http://www.aaabg.org/aaabghome/AAABG21papers/Walmsley21013.pdf>

Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives. / Walmsley, Bradley J; Wolcott, Matthew L; Pitchford, W S et al.
Proceedings of the Association for the Advancement of Animal Breeding and Genetics. ed. / Kim Bunter; Tim Byrne; Hans Daetwyler; Susanne Hermesch; Kathryn Kemper; James Kijas; David Nation; Wayne Pitchford; Suzanne Rowe; Matt Shaffer; Alison van Eenennaam. Vol. 21 Armidale, Australia: Association for the Advancement of Animal Breeding and Genetics (AAABG), 2015. p. 13-16.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives

AU - Walmsley, Bradley J

AU - Wolcott, Matthew L

AU - Pitchford, W S

AU - Johnston, David

AU - Barwick, Stephen

PY - 2015

Y1 - 2015

N2 - An extended procedure is described for modelling cow liveweight change over the production year for valuing cow liveweight in breeding objectives. The pattern of change, before and after trait change, is able to be approximated from breeder-described variables for any production system. Examination of seven datasets showed cow liveweight changes systematically over age in many herds and breeds. Analyses showed liveweight loss from pre-calving to mating and cow liveweight at mating both change in proportion to the liveweight of the cow pre-calving. Differences in cow liveweight pre-calving are thus larger than are the differences at mating, which affects feed costs in valuing cow liveweight at mating. Adoption of the procedure will increase the precision with which feed cost is associated with cow liveweight in beef cattle breeding objectives.

AB - An extended procedure is described for modelling cow liveweight change over the production year for valuing cow liveweight in breeding objectives. The pattern of change, before and after trait change, is able to be approximated from breeder-described variables for any production system. Examination of seven datasets showed cow liveweight changes systematically over age in many herds and breeds. Analyses showed liveweight loss from pre-calving to mating and cow liveweight at mating both change in proportion to the liveweight of the cow pre-calving. Differences in cow liveweight pre-calving are thus larger than are the differences at mating, which affects feed costs in valuing cow liveweight at mating. Adoption of the procedure will increase the precision with which feed cost is associated with cow liveweight in beef cattle breeding objectives.

KW - Animal Breeding

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M3 - Conference contribution

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VL - 21

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EP - 16

BT - Proceedings of the Association for the Advancement of Animal Breeding and Genetics

A2 - Bunter, Kim

A2 - Byrne, Tim

A2 - Daetwyler, Hans

A2 - Hermesch, Susanne

A2 - Kemper, Kathryn

A2 - Kijas, James

A2 - Nation, David

A2 - Pitchford, Wayne

A2 - Rowe, Suzanne

A2 - Shaffer, Matt

A2 - van Eenennaam, Alison

PB - Association for the Advancement of Animal Breeding and Genetics (AAABG)

CY - Armidale, Australia

T2 - AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics

Y2 - 28 September 2015 through 30 September 2015

ER -

Walmsley BJ, Wolcott ML, Pitchford WS, Johnston D, Barwick S. Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives. In Bunter K, Byrne T, Daetwyler H, Hermesch S, Kemper K, Kijas J, Nation D, Pitchford W, Rowe S, Shaffer M, van Eenennaam A, editors, Proceedings of the Association for the Advancement of Animal Breeding and Genetics. Vol. 21. Armidale, Australia: Association for the Advancement of Animal Breeding and Genetics (AAABG). 2015. p. 13-16

Extended Cow Liveweight Modelling for Beef Cattle Breeding Objectives

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Keywords

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