Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes

L R Piper; Andrew Swan; H G Brewer

Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes

L R Piper, Andrew Swan, H G Brewer

Animal Genetics and Breeding Unit

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

Abstract

The effects of simulated selection at hogget age for fleece weight, fibre diameter, body weight and two relevant selection indexes on lifetime fertility (EL/EJ), litter size (LB/EL), lamb survival LW/LB) and reproduction rate (LW/EJ) has been examined for a medium-wool random breeding control flock of Merino sheep grazing in south west Queensland. There were no significant effects on lifetime reproduction rate or any of the three component traits, of selection for fleece weight, fibre diameter or either of the two selection indexes. Selection for body weight had a significant positive effect on lifetime litter size (p<0.001) and an almost significant positive effect on lifetime reproduction rate (p=0.059). These data do not support the view that phenotypic selection for increased fleece weight will have adverse effects on lifetime reproduction rate.

Original language	English
Title of host publication	Proceedings of the Association for the Advancement of Animal Breeding and Genetics
Editors	Alex Safari, Bill Pattie, Barrie Restall
Place of Publication	Armidale, Australia
Publisher	Association for the Advancement of Animal Breeding and Genetics (AAABG)
Pages	374-377
Volume	18
ISBN (Print)	9780646521039
Publication status	Published - 2009
Event	AAABG 2009: 18th Conference of the Association for the Advancement of Animal Breeding and Genetics - Barossa Valley, Australia Duration: 27 Sept 2009 → 2 Oct 2009

Conference

Conference	AAABG 2009: 18th Conference of the Association for the Advancement of Animal Breeding and Genetics
City	Barossa Valley, Australia
Period	27/09/09 → 2/10/09

Keywords

Animal Breeding

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https://hdl.handle.net/1959.11/5258

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Piper, L. R., Swan, A., & Brewer, H. G. (2009). Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes. In A. Safari, B. Pattie, & B. Restall (Eds.), Proceedings of the Association for the Advancement of Animal Breeding and Genetics (Vol. 18, pp. 374-377). Association for the Advancement of Animal Breeding and Genetics (AAABG). https://hdl.handle.net/1959.11/5258

Piper, L R ; Swan, Andrew ; Brewer, H G. / Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes. Proceedings of the Association for the Advancement of Animal Breeding and Genetics. editor / Alex Safari ; Bill Pattie ; Barrie Restall. Vol. 18 Armidale, Australia : Association for the Advancement of Animal Breeding and Genetics (AAABG), 2009. pp. 374-377

@inproceedings{59620ec9578342328776fde4f5c346cb,

title = "Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes",

abstract = "The effects of simulated selection at hogget age for fleece weight, fibre diameter, body weight and two relevant selection indexes on lifetime fertility (EL/EJ), litter size (LB/EL), lamb survival LW/LB) and reproduction rate (LW/EJ) has been examined for a medium-wool random breeding control flock of Merino sheep grazing in south west Queensland. There were no significant effects on lifetime reproduction rate or any of the three component traits, of selection for fleece weight, fibre diameter or either of the two selection indexes. Selection for body weight had a significant positive effect on lifetime litter size (p<0.001) and an almost significant positive effect on lifetime reproduction rate (p=0.059). These data do not support the view that phenotypic selection for increased fleece weight will have adverse effects on lifetime reproduction rate.",

keywords = "Animal Breeding",

author = "Piper, \{L R\} and Andrew Swan and Brewer, \{H G\}",

year = "2009",

language = "English",

isbn = "9780646521039",

volume = "18",

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editor = "Alex Safari and Bill Pattie and Barrie Restall",

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 2009: 18th Conference of the Association for the Advancement of Animal Breeding and Genetics ; Conference date: 27-09-2009 Through 02-10-2009",

}

Piper, LR, Swan, A & Brewer, HG 2009, Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes. in A Safari, B Pattie & B Restall (eds), Proceedings of the Association for the Advancement of Animal Breeding and Genetics. vol. 18, Association for the Advancement of Animal Breeding and Genetics (AAABG), Armidale, Australia, pp. 374-377, AAABG 2009: 18th Conference of the Association for the Advancement of Animal Breeding and Genetics, Barossa Valley, Australia, 27/09/09. <https://hdl.handle.net/1959.11/5258>

Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes. / Piper, L R; Swan, Andrew; Brewer, H G.
Proceedings of the Association for the Advancement of Animal Breeding and Genetics. ed. / Alex Safari; Bill Pattie; Barrie Restall. Vol. 18 Armidale, Australia: Association for the Advancement of Animal Breeding and Genetics (AAABG), 2009. p. 374-377.

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

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AB - The effects of simulated selection at hogget age for fleece weight, fibre diameter, body weight and two relevant selection indexes on lifetime fertility (EL/EJ), litter size (LB/EL), lamb survival LW/LB) and reproduction rate (LW/EJ) has been examined for a medium-wool random breeding control flock of Merino sheep grazing in south west Queensland. There were no significant effects on lifetime reproduction rate or any of the three component traits, of selection for fleece weight, fibre diameter or either of the two selection indexes. Selection for body weight had a significant positive effect on lifetime litter size (p<0.001) and an almost significant positive effect on lifetime reproduction rate (p=0.059). These data do not support the view that phenotypic selection for increased fleece weight will have adverse effects on lifetime reproduction rate.

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

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Piper LR, Swan A, Brewer HG. Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes. In Safari A, Pattie B, Restall B, editors, Proceedings of the Association for the Advancement of Animal Breeding and Genetics. Vol. 18. Armidale, Australia: Association for the Advancement of Animal Breeding and Genetics (AAABG). 2009. p. 374-377

Effects on lifetime reproductive performance of phenotypic selection for fleece weight, fibre diameter, body weight and related selection indexes

Abstract

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