Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow
Data on 202 sires, 718 dams and 3,192 progeny from a selection experiment were used to estimate phenotypic and genetic parameters for litter size and body weight in guinea pigs. Effects of sex and parity were estimated. Heritability estimates were obtained from offspring-parent regression and from i...
| Autores principales: | , , |
|---|---|
| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
American Society of Animal Science
2023
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/20.500.12955/2380 https://doi.org/10.2527/jas1983.564814x |
| _version_ | 1855490160672636928 |
|---|---|
| author | Quijandria, B. Chauca Francia, Lilia Janine Robison, O. W. |
| author_browse | Chauca Francia, Lilia Janine Quijandria, B. Robison, O. W. |
| author_facet | Quijandria, B. Chauca Francia, Lilia Janine Robison, O. W. |
| author_sort | Quijandria, B. |
| collection | Repositorio INIA |
| description | Data on 202 sires, 718 dams and 3,192 progeny from a selection experiment were used to estimate phenotypic and genetic parameters for litter size and body weight in guinea pigs. Effects of sex and parity were estimated. Heritability estimates were obtained from offspring-parent regression and from intraclass correlation of paternal and maternal half-sibs. Genetic and phenotypic correlations also were estimated. Parity effects were significant only for weight traits. Sex effects were significant for weights at several ages. Significant negative linear effects of number born alive were found for birth, weaning and 13-wk weights. Heritability estimates from daughter-dam regression were .10 ± .05, .06 ± .02 and .08 ± .02 for number born, number born alive and number weaned and .12 ± .03, -.13 ± .03 and .12 ± .02 for birth, weaning and 13-wk weights, respectively. Paternal half-sib heritability estimates were .02 ± .04, .10 ± .04 and .17 ± .05 for birth, weaning and 13-wk weights. Heritability values from components for maternal half-sibs were .30 ±.30, .16 ±.31 and .15 ± .31 for number born, number born alive and number weaned, respectively. Genetic correlations among weights at different ages were .24 to 1.2 and among litter size traits were .51 to .77. Genetic correlations between litter size traits and birth and weaning weights ranged from -.61 to -.97; whereas correlations of litter size traits with 13-wk weight were .31 to .39. Genetic parameters estimated from similarity among relatives agreed very well with realized heritabilities and genetic correlations obtained from selection. |
| format | Artículo |
| id | INIA2380 |
| institution | Institucional Nacional de Innovación Agraria |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | American Society of Animal Science |
| publisherStr | American Society of Animal Science |
| record_format | dspace |
| spelling | INIA23802024-02-27T14:38:58Z Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow Quijandria, B. Chauca Francia, Lilia Janine Robison, O. W. Body weight Guinea pigs Litter size Phenotype Pregnancy Selection (Genetics) https://purl.org/pe-repo/ocde/ford#4.02.01 Phenotyping Fenotipado Guinea pigs Cobaya Litter size Tamaño de la camada Body weight Peso corporal Data on 202 sires, 718 dams and 3,192 progeny from a selection experiment were used to estimate phenotypic and genetic parameters for litter size and body weight in guinea pigs. Effects of sex and parity were estimated. Heritability estimates were obtained from offspring-parent regression and from intraclass correlation of paternal and maternal half-sibs. Genetic and phenotypic correlations also were estimated. Parity effects were significant only for weight traits. Sex effects were significant for weights at several ages. Significant negative linear effects of number born alive were found for birth, weaning and 13-wk weights. Heritability estimates from daughter-dam regression were .10 ± .05, .06 ± .02 and .08 ± .02 for number born, number born alive and number weaned and .12 ± .03, -.13 ± .03 and .12 ± .02 for birth, weaning and 13-wk weights, respectively. Paternal half-sib heritability estimates were .02 ± .04, .10 ± .04 and .17 ± .05 for birth, weaning and 13-wk weights. Heritability values from components for maternal half-sibs were .30 ±.30, .16 ±.31 and .15 ± .31 for number born, number born alive and number weaned, respectively. Genetic correlations among weights at different ages were .24 to 1.2 and among litter size traits were .51 to .77. Genetic correlations between litter size traits and birth and weaning weights ranged from -.61 to -.97; whereas correlations of litter size traits with 13-wk weight were .31 to .39. Genetic parameters estimated from similarity among relatives agreed very well with realized heritabilities and genetic correlations obtained from selection. 2023-11-21T15:41:31Z 2023-11-21T15:41:31Z 1983-04-01 info:eu-repo/semantics/article Quijandria, B.; de Zaldivar, L. C.; & Robison, O. W. (1983). Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight. Journal of Animal Science, 56(4), 814-819. doi: 10.2527/jas1983.564814x 1525-3163 https://hdl.handle.net/20.500.12955/2380 https://doi.org/10.2527/jas1983.564814x eng Journal of Animal Science info:eu-repo/semantics/restrictedAccess application/pdf American Society of Animal Science US Instituto Nacional de Innovación Agraria Repositorio Institucional - INIA |
| spellingShingle | Body weight Guinea pigs Litter size Phenotype Pregnancy Selection (Genetics) https://purl.org/pe-repo/ocde/ford#4.02.01 Phenotyping Fenotipado Guinea pigs Cobaya Litter size Tamaño de la camada Body weight Peso corporal Quijandria, B. Chauca Francia, Lilia Janine Robison, O. W. Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| title | Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| title_full | Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| title_fullStr | Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| title_full_unstemmed | Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| title_short | Selection in guinea pigs: I. Estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| title_sort | selection in guinea pigs i estimation of phenotypic and genetic parameters for litter size and body weight get access arrow |
| topic | Body weight Guinea pigs Litter size Phenotype Pregnancy Selection (Genetics) https://purl.org/pe-repo/ocde/ford#4.02.01 Phenotyping Fenotipado Guinea pigs Cobaya Litter size Tamaño de la camada Body weight Peso corporal |
| url | https://hdl.handle.net/20.500.12955/2380 https://doi.org/10.2527/jas1983.564814x |
| work_keys_str_mv | AT quijandriab selectioninguineapigsiestimationofphenotypicandgeneticparametersforlittersizeandbodyweightgetaccessarrow AT chaucafrancialiliajanine selectioninguineapigsiestimationofphenotypicandgeneticparametersforlittersizeandbodyweightgetaccessarrow AT robisonow selectioninguineapigsiestimationofphenotypicandgeneticparametersforlittersizeandbodyweightgetaccessarrow |