Genetic variability in calving success in Aberdeen Angus cows under extensive recording
Data from 2032 Uruguayan Aberdeen Angus cows under extensive management and recording practices were analysed with Bayesian threshold-liability sire models, to assess genetic variability in calving success (CS), defined as a different binary trait for each of the second (CS2), third (CS3) and fourth...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2007-01-01
|
| Series: | Animal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1751731107000390 |
| _version_ | 1818597475783540736 |
|---|---|
| author | J.I. Urioste Y.M. Chang H. Naya D. Gianola |
| author_facet | J.I. Urioste Y.M. Chang H. Naya D. Gianola |
| author_sort | J.I. Urioste |
| collection | DOAJ |
| description | Data from 2032 Uruguayan Aberdeen Angus cows under extensive management and recording practices were analysed with Bayesian threshold-liability sire models, to assess genetic variability in calving success (CS), defined as a different binary trait for each of the second (CS2), third (CS3) and fourth (CS4) calving opportunities. Sire (herd) variances ranged from 0.08 to 0.11 (0.10 to 0.20) and heritability from 0.27 to 0.35, with large credibility intervals. Correlations between herd effects on CS at different calving opportunities were positive. Genetic correlation between CS2 and CS4 was positive (0.68), whereas those involving adjacent calving opportunities (CS2–CS3 and CS3–CS4) were negative, at −0.39 and −0.54, respectively. The residual correlation CS2–CS3 was negative (−0.32). The extent of uncertainty associated with the posterior estimates of the parameters was further evaluated through simulation, assuming different true values (−0.4, −0.2, +0.2 and +0.4) for the genetic correlations and changes in the degree of belief parameters of the inverse Wishart priors for the sire covariance matrix. Although inferences were not sharp enough, CS appears to be moderately heritable. The quality of data recording should be improved, in order to effect genetic improvement in female fertility. |
| first_indexed | 2024-12-16T11:48:24Z |
| format | Article |
| id | doaj.art-f5e554088c0f42c1be6f8c697ac10a74 |
| institution | Directory Open Access Journal |
| issn | 1751-7311 |
| language | English |
| last_indexed | 2024-12-16T11:48:24Z |
| publishDate | 2007-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Animal |
| spelling | doaj.art-f5e554088c0f42c1be6f8c697ac10a742022-12-21T22:32:46ZengElsevierAnimal1751-73112007-01-011810811088Genetic variability in calving success in Aberdeen Angus cows under extensive recordingJ.I. Urioste0Y.M. Chang1H. Naya2D. Gianola3Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, UruguayDepartment of Dairy Science, University of Wisconsin-Madison, 1675 Observatory Drive, Madison, WI 53706, USADepartamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay; Unidad de Bioinformática, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, UruguayDepartment of Dairy Science, University of Wisconsin-Madison, 1675 Observatory Drive, Madison, WI 53706, USA; Department of Animal Sciences, University of Wisconsin-Madison, 1675 Observatory Drive, Madison, WI 53706, USAData from 2032 Uruguayan Aberdeen Angus cows under extensive management and recording practices were analysed with Bayesian threshold-liability sire models, to assess genetic variability in calving success (CS), defined as a different binary trait for each of the second (CS2), third (CS3) and fourth (CS4) calving opportunities. Sire (herd) variances ranged from 0.08 to 0.11 (0.10 to 0.20) and heritability from 0.27 to 0.35, with large credibility intervals. Correlations between herd effects on CS at different calving opportunities were positive. Genetic correlation between CS2 and CS4 was positive (0.68), whereas those involving adjacent calving opportunities (CS2–CS3 and CS3–CS4) were negative, at −0.39 and −0.54, respectively. The residual correlation CS2–CS3 was negative (−0.32). The extent of uncertainty associated with the posterior estimates of the parameters was further evaluated through simulation, assuming different true values (−0.4, −0.2, +0.2 and +0.4) for the genetic correlations and changes in the degree of belief parameters of the inverse Wishart priors for the sire covariance matrix. Although inferences were not sharp enough, CS appears to be moderately heritable. The quality of data recording should be improved, in order to effect genetic improvement in female fertility.http://www.sciencedirect.com/science/article/pii/S1751731107000390Bayesian theorybeef cowscalving successgenetic parametersthreshold models |
| spellingShingle | J.I. Urioste Y.M. Chang H. Naya D. Gianola Genetic variability in calving success in Aberdeen Angus cows under extensive recording Animal Bayesian theory beef cows calving success genetic parameters threshold models |
| title | Genetic variability in calving success in Aberdeen Angus cows under extensive recording |
| title_full | Genetic variability in calving success in Aberdeen Angus cows under extensive recording |
| title_fullStr | Genetic variability in calving success in Aberdeen Angus cows under extensive recording |
| title_full_unstemmed | Genetic variability in calving success in Aberdeen Angus cows under extensive recording |
| title_short | Genetic variability in calving success in Aberdeen Angus cows under extensive recording |
| title_sort | genetic variability in calving success in aberdeen angus cows under extensive recording |
| topic | Bayesian theory beef cows calving success genetic parameters threshold models |
| url | http://www.sciencedirect.com/science/article/pii/S1751731107000390 |
| work_keys_str_mv | AT jiurioste geneticvariabilityincalvingsuccessinaberdeenanguscowsunderextensiverecording AT ymchang geneticvariabilityincalvingsuccessinaberdeenanguscowsunderextensiverecording AT hnaya geneticvariabilityincalvingsuccessinaberdeenanguscowsunderextensiverecording AT dgianola geneticvariabilityincalvingsuccessinaberdeenanguscowsunderextensiverecording |