Heritability estimates for Merino sheep obtained from a national progeny test
Data of 5342 progeny from 232 sires from 30 genetically linked flocks, collected through the National Progeny Testing program for Merino sheep from 1991 to 1996, were used to estimate heritabilities for several production and type traits. The traits analysed were: body weight (BW), clean fleece wei...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
African Journals Online
1999
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/66963 |
| _version_ | 1855523905472561152 |
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| author | Groenewald, P.G.J. Olivier, J.J. Olivier, W.J. |
| author_browse | Groenewald, P.G.J. Olivier, J.J. Olivier, W.J. |
| author_facet | Groenewald, P.G.J. Olivier, J.J. Olivier, W.J. |
| author_sort | Groenewald, P.G.J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Data of 5342 progeny from 232 sires from 30 genetically linked flocks, collected
through the National Progeny Testing program for Merino sheep from 1991 to 1996, were used to estimate heritabilities for several production and type traits. The traits analysed were: body weight (BW), clean fleece weight (CFW), mean fibre diameter (MFD), staple length (SL), fold (wrinkle) score (FS), wool quality (QUAL), variation crimps per 25 mm (VAR), wool yolk (OIL), staple formation (SF), belly and points,
(BP), head size (HEA~), colour (COL), fore quarters (FQ), pasterns (PAS), hocks
(HOC) and conformation (CON). In most traits the effect of herd-year-season"'
(HYS) was significant (P ~ 0.01). For the production traits, excluding MFD, the interaction between HYS and sex was significant. Birth status had no significant
(P¡Ý 0.05) effect on QUAL, OIL, SF, COL and PAS. Heritability estimates for the various traits were: 0.34 for BW, 0.23 for CFW, 0.44 for MFD, 0.70 for SL, 0.32 for
FS, 0.27 for QUAL, 0.23 for VAR, 0.24 for OIL, 0.09 for SF, 0.17 for BP, 0.35 for
HEAD, 0.17 for COL, 0.21 for FQ, 0.12 for PAS, 0.26 for HOC and 0.31 for CON.
Standard errors for these estimates ranged from 0.03 to 0.06. It is recommended
that these heritability estimates be used in the calculation of selection index weighting factors, as well as EPD's in the National Progeny Testing Scheme. |
| format | Journal Article |
| id | CGSpace66963 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1999 |
| publishDateRange | 1999 |
| publishDateSort | 1999 |
| publisher | African Journals Online |
| publisherStr | African Journals Online |
| record_format | dspace |
| spelling | CGSpace669632024-05-01T08:17:04Z Heritability estimates for Merino sheep obtained from a national progeny test Groenewald, P.G.J. Olivier, J.J. Olivier, W.J. sheep heritability wool progeny testing selection index quality Data of 5342 progeny from 232 sires from 30 genetically linked flocks, collected through the National Progeny Testing program for Merino sheep from 1991 to 1996, were used to estimate heritabilities for several production and type traits. The traits analysed were: body weight (BW), clean fleece weight (CFW), mean fibre diameter (MFD), staple length (SL), fold (wrinkle) score (FS), wool quality (QUAL), variation crimps per 25 mm (VAR), wool yolk (OIL), staple formation (SF), belly and points, (BP), head size (HEA~), colour (COL), fore quarters (FQ), pasterns (PAS), hocks (HOC) and conformation (CON). In most traits the effect of herd-year-season"' (HYS) was significant (P ~ 0.01). For the production traits, excluding MFD, the interaction between HYS and sex was significant. Birth status had no significant (P¡Ý 0.05) effect on QUAL, OIL, SF, COL and PAS. Heritability estimates for the various traits were: 0.34 for BW, 0.23 for CFW, 0.44 for MFD, 0.70 for SL, 0.32 for FS, 0.27 for QUAL, 0.23 for VAR, 0.24 for OIL, 0.09 for SF, 0.17 for BP, 0.35 for HEAD, 0.17 for COL, 0.21 for FQ, 0.12 for PAS, 0.26 for HOC and 0.31 for CON. Standard errors for these estimates ranged from 0.03 to 0.06. It is recommended that these heritability estimates be used in the calculation of selection index weighting factors, as well as EPD's in the National Progeny Testing Scheme. 1999 2015-06-05T12:18:44Z 2015-06-05T12:18:44Z Journal Article https://hdl.handle.net/10568/66963 en Open Access African Journals Online Groenewald, P.G.J., Olivier, J.J. and Olivier, W.J. 1999. Heritability estimates for Merino sheep obtained from a national progeny test. South African Journal of Animal Science 29(3): 174-178. |
| spellingShingle | sheep heritability wool progeny testing selection index quality Groenewald, P.G.J. Olivier, J.J. Olivier, W.J. Heritability estimates for Merino sheep obtained from a national progeny test |
| title | Heritability estimates for Merino sheep obtained from a national progeny test |
| title_full | Heritability estimates for Merino sheep obtained from a national progeny test |
| title_fullStr | Heritability estimates for Merino sheep obtained from a national progeny test |
| title_full_unstemmed | Heritability estimates for Merino sheep obtained from a national progeny test |
| title_short | Heritability estimates for Merino sheep obtained from a national progeny test |
| title_sort | heritability estimates for merino sheep obtained from a national progeny test |
| topic | sheep heritability wool progeny testing selection index quality |
| url | https://hdl.handle.net/10568/66963 |
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