The value of birthcoat score as an early age selection criterion for superfine merino sheep

K E Kemper; J L Smith; I W Purvis

The value of birthcoat score as an early age selection criterion for superfine merino sheep

K E Kemper
, J L Smith
, I W Purvis

School of Environmental & Rural Science

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

Abstract

Data from the CSIRO Fine Wool Project flock were used to examine the relationships between birthcoat, economically important fleece traits and body weight. Birthcoat was found to be highly heritable, and had small positive genetic correlations with coefficient of variation of fibre diameter (0.24), staple length (0.25) and mean fibre diameter (0.12). Genetic correlations between birthcoat and clean fleece weight, staple strength, mean fibre curvature, birth weight and hogget body weight were essentially zero. Correlation estimates were used to model the effects of selection strategies incorporating birthcoat on a breeding objective aimed at increasing clean fleece weight, reducing mean fibre diameter and maintaining staple strength. Birthcoat did not increase economic gains when included in the selection criteria.

Original language	English
Title of host publication	Proceedings of the Association for the Advancement of Animal Breeding and Genetics
Editors	Linda Hygate
Place of Publication	Armidale, Australia
Publisher	Association for the Advancement of Animal Breeding and Genetics (AAABG)
Pages	139-143
Volume	15
ISBN (Print)	0958629927
Publication status	Published - 2003
Event	AAABG 2003: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics - Melbourne, Australia Duration: 7 Jul 2003 → 11 Jul 2003

Conference

Conference	AAABG 2003: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics
City	Melbourne, Australia
Period	7/07/03 → 11/07/03

Keywords

Animal Reproduction

Access to Document

https://hdl.handle.net/1959.11/4415

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Kemper, K. E., Smith, J. L., & Purvis, I. W. (2003). The value of birthcoat score as an early age selection criterion for superfine merino sheep. In L. Hygate (Ed.), Proceedings of the Association for the Advancement of Animal Breeding and Genetics (Vol. 15, pp. 139-143). Association for the Advancement of Animal Breeding and Genetics (AAABG). https://hdl.handle.net/1959.11/4415

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title = "The value of birthcoat score as an early age selection criterion for superfine merino sheep",

abstract = "Data from the CSIRO Fine Wool Project flock were used to examine the relationships between birthcoat, economically important fleece traits and body weight. Birthcoat was found to be highly heritable, and had small positive genetic correlations with coefficient of variation of fibre diameter (0.24), staple length (0.25) and mean fibre diameter (0.12). Genetic correlations between birthcoat and clean fleece weight, staple strength, mean fibre curvature, birth weight and hogget body weight were essentially zero. Correlation estimates were used to model the effects of selection strategies incorporating birthcoat on a breeding objective aimed at increasing clean fleece weight, reducing mean fibre diameter and maintaining staple strength. Birthcoat did not increase economic gains when included in the selection criteria.",

keywords = "Animal Reproduction",

author = "Kemper, \{K E\} and Smith, \{J L\} and Purvis, \{I W\}",

year = "2003",

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volume = "15",

pages = "139--143",

editor = "Linda Hygate",

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 2003: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics ; Conference date: 07-07-2003 Through 11-07-2003",

}

Kemper, KE, Smith, JL & Purvis, IW 2003, The value of birthcoat score as an early age selection criterion for superfine merino sheep. in L Hygate (ed.), Proceedings of the Association for the Advancement of Animal Breeding and Genetics. vol. 15, Association for the Advancement of Animal Breeding and Genetics (AAABG), Armidale, Australia, pp. 139-143, AAABG 2003: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics, Melbourne, Australia, 7/07/03. <https://hdl.handle.net/1959.11/4415>

The value of birthcoat score as an early age selection criterion for superfine merino sheep. / Kemper, K E; Smith, J L; Purvis, I W.
Proceedings of the Association for the Advancement of Animal Breeding and Genetics. ed. / Linda Hygate. Vol. 15 Armidale, Australia: Association for the Advancement of Animal Breeding and Genetics (AAABG), 2003. p. 139-143.

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

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AU - Smith, J L

AU - Purvis, I W

PY - 2003

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N2 - Data from the CSIRO Fine Wool Project flock were used to examine the relationships between birthcoat, economically important fleece traits and body weight. Birthcoat was found to be highly heritable, and had small positive genetic correlations with coefficient of variation of fibre diameter (0.24), staple length (0.25) and mean fibre diameter (0.12). Genetic correlations between birthcoat and clean fleece weight, staple strength, mean fibre curvature, birth weight and hogget body weight were essentially zero. Correlation estimates were used to model the effects of selection strategies incorporating birthcoat on a breeding objective aimed at increasing clean fleece weight, reducing mean fibre diameter and maintaining staple strength. Birthcoat did not increase economic gains when included in the selection criteria.

AB - Data from the CSIRO Fine Wool Project flock were used to examine the relationships between birthcoat, economically important fleece traits and body weight. Birthcoat was found to be highly heritable, and had small positive genetic correlations with coefficient of variation of fibre diameter (0.24), staple length (0.25) and mean fibre diameter (0.12). Genetic correlations between birthcoat and clean fleece weight, staple strength, mean fibre curvature, birth weight and hogget body weight were essentially zero. Correlation estimates were used to model the effects of selection strategies incorporating birthcoat on a breeding objective aimed at increasing clean fleece weight, reducing mean fibre diameter and maintaining staple strength. Birthcoat did not increase economic gains when included in the selection criteria.

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M3 - Conference contribution

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

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T2 - AAABG 2003: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics

Y2 - 7 July 2003 through 11 July 2003

ER -

The value of birthcoat score as an early age selection criterion for superfine merino sheep

Abstract

Conference

Keywords

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