Comparison of breeding objectives across countries with application to sheep indexes in New Zealand and Ireland. (April 2015)
- Record Type:
- Journal Article
- Title:
- Comparison of breeding objectives across countries with application to sheep indexes in New Zealand and Ireland. (April 2015)
- Main Title:
- Comparison of breeding objectives across countries with application to sheep indexes in New Zealand and Ireland
- Authors:
- Santos, B.F.S.
McHugh, N.
Byrne, T.J.
Berry, D.P.
Amer, P.R. - Abstract:
- <abstract abstract-type="main" id="jbg12146-abs-0001"> <title>Summary</title> <p>Breeding objectives and selection indexes underpin the direction, the extent and the economic implications of selection in livestock populations under specific production systems. The objective of this study was to describe the methodology to calculate correlations between national selection indexes and gain a deeper understanding of the factors influencing responses in economically important traits in both the New Zealand and Irish sheep industries. Moderate to strong correlations were calculated among indexes within and between countries, with the strongest correlation (0.86) between the New Zealand and Irish maternal indexes. In both countries, responses to selection in the maternal indexes are largely driven by growth traits; each index, however, has a different balance of traits. Ewe mature weight also accounts for an important proportion of overall response and has significant emphasis in both maternal indexes. The majority of emphasis in terminal indexes of both countries is on growth and meat traits. Results from this study indicate that differences between national breeding objectives are unlikely to be a barrier to exchange of gene stocks among countries. Future research should investigate the extent to which genotype‐by‐environment (G×E) interactions exist at the level of individual traits. The methodology presented in this study is robust and represents an opportunity to inform the<abstract abstract-type="main" id="jbg12146-abs-0001"> <title>Summary</title> <p>Breeding objectives and selection indexes underpin the direction, the extent and the economic implications of selection in livestock populations under specific production systems. The objective of this study was to describe the methodology to calculate correlations between national selection indexes and gain a deeper understanding of the factors influencing responses in economically important traits in both the New Zealand and Irish sheep industries. Moderate to strong correlations were calculated among indexes within and between countries, with the strongest correlation (0.86) between the New Zealand and Irish maternal indexes. In both countries, responses to selection in the maternal indexes are largely driven by growth traits; each index, however, has a different balance of traits. Ewe mature weight also accounts for an important proportion of overall response and has significant emphasis in both maternal indexes. The majority of emphasis in terminal indexes of both countries is on growth and meat traits. Results from this study indicate that differences between national breeding objectives are unlikely to be a barrier to exchange of gene stocks among countries. Future research should investigate the extent to which genotype‐by‐environment (G×E) interactions exist at the level of individual traits. The methodology presented in this study is robust and represents an opportunity to inform the potential merits of international exchange of germplasm.</p> </abstract> … (more)
- Is Part Of:
- Journal of animal breeding and genetics. Volume 132:Number 2(2015:Apr.)
- Journal:
- Journal of animal breeding and genetics
- Issue:
- Volume 132:Number 2(2015:Apr.)
- Issue Display:
- Volume 132, Issue 2 (2015)
- Year:
- 2015
- Volume:
- 132
- Issue:
- 2
- Issue Sort Value:
- 2015-0132-0002-0000
- Page Start:
- 144
- Page End:
- 154
- Publication Date:
- 2015-04
- Subjects:
- Livestock -- Breeding -- Periodicals
Livestock -- Genetics -- Periodicals
636.0820 - Journal URLs:
- http://www.blackwellpublishing.com/journal.asp?ref=0931-2668 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1111/jbg.12146 ↗
- Languages:
- English
- ISSNs:
- 0931-2668
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4935.450000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 3084.xml