ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT
Information from 1259 first farrowing intervals (FI) from Duroc (D), Hampshire (H), Landrace (L) and Yorkshire (Y) sows and their crosses were obtained from the records of a commercial farm in the State of Yucatán, México, from 1981 to 1989. The climate of the region is dry-hot with rains in summer. Sows feeding during pregnancy and lactation was based on commercial diets with 12 and 14% of crude protein, respectively. Data on FI were analized using general linear models. The statistical model which described the data included the effects of year and season of the first farrowing, the additive direct and maternal genetic effects, the direct specific and the average maternal heterosis effects. Direct and maternal additive genetic effects had no significant influences on FI. The direct specific and average maternal heterosis effects were negative but nonsignificant (p>0.05). The average direct and maternal heterosis values were -4.35 and -1.77 days, respectively. In conclusion, the negative constants for the heterosis effects, although non significant (p>0.05), suggest a better reproductive performance for the crossbred sows as compared with the purebreds.
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Colegio de Postgraduados
1996
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oai:ojs.pkp.sfu.ca:article14212020-05-14T05:46:53Z ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT ESTIMACION DE EFECTOS GENETICOS ADITIVOS Y DE HETEROSIS PARA EL INTERVALO ENTRE PARTOS DE CERDAS EN CONDICIONES TROPICALES Segura-Correa, José C. Additive effects heterosis farrowing interval the tropics sows Efectos aditivos heterosis intervalo entre partos trópico cerdas Information from 1259 first farrowing intervals (FI) from Duroc (D), Hampshire (H), Landrace (L) and Yorkshire (Y) sows and their crosses were obtained from the records of a commercial farm in the State of Yucatán, México, from 1981 to 1989. The climate of the region is dry-hot with rains in summer. Sows feeding during pregnancy and lactation was based on commercial diets with 12 and 14% of crude protein, respectively. Data on FI were analized using general linear models. The statistical model which described the data included the effects of year and season of the first farrowing, the additive direct and maternal genetic effects, the direct specific and the average maternal heterosis effects. Direct and maternal additive genetic effects had no significant influences on FI. The direct specific and average maternal heterosis effects were negative but nonsignificant (p>0.05). The average direct and maternal heterosis values were -4.35 and -1.77 days, respectively. In conclusion, the negative constants for the heterosis effects, although non significant (p>0.05), suggest a better reproductive performance for the crossbred sows as compared with the purebreds. Se analizó la información de 1259 intervalos entre el primero y el segundo partos (IEP) de cerdas Duroc (D), Hampshire (H), Landrace (L), Yorkshire (Y) y sus cruzas, obtenida de los registros de una granja comercial en Yucatán, México, de 1981 a 1989. El clima de la región es cálido seco con lluvias en verano. La alimentación de las cerdas durante la gestación y lactancia consistió en dietas comerciales con 12 y 14% de proteína cruda, respec-tivamente. Los datos de IEP se analizaron utilizando modelos lineales generales para estimar los efectos de año y época al primer parto, los efectos genéticos aditivos: directos y maternos, heterosis directa específica y promedio de heterosis materna. No se encontró influencia significativa de los efectos aditivos directos o maternos y de heterosis en el IEP. Las constantes de heterosis directa específica para cada cruza y promedio de heterosis materna fueron negativas, aunque no significativas (p>0.05). Las constantes de los promedios de heterosis directa y materna fueron de -4.35 y -1.77 días, respectivamente. En conclusión, las constantes de heterosis negativas, aunque no fueron significativas (p>0.05), sugieren que es posible esperar un mejor comportamiento reproductivo en las cerdas cruzadas en comparación con las puras. Colegio de Postgraduados 1996-06-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1421 Agrociencia; Vol. 30 No. 2 (1996): 1996-abr-jun; 197-200 Agrociencia; Vol. 30 Núm. 2 (1996): 1996-abr-jun; 197-200 2521-9766 1405-3195 spa https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1421/1421 |
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México |
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| language |
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Digital |
| author |
Segura-Correa, José C. |
| spellingShingle |
Segura-Correa, José C. ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT |
| author_facet |
Segura-Correa, José C. |
| author_sort |
Segura-Correa, José C. |
| title |
ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT |
| title_short |
ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT |
| title_full |
ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT |
| title_fullStr |
ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT |
| title_full_unstemmed |
ESTIMATES OF ADDITIVE AND HETEROTIC GENETIC EFFECTS FOR THE FARROWING INTERVAL OF SOWS IN A TROPICAL ENVIRONMENT |
| title_sort |
estimates of additive and heterotic genetic effects for the farrowing interval of sows in a tropical environment |
| description |
Information from 1259 first farrowing intervals (FI) from Duroc (D), Hampshire (H), Landrace (L) and Yorkshire (Y) sows and their crosses were obtained from the
records of a commercial farm in the State of Yucatán, México, from 1981 to 1989. The climate of the region is dry-hot with rains in summer. Sows feeding during pregnancy and lactation was
based on commercial diets with 12 and 14% of crude protein, respectively. Data on FI were analized using general linear models. The statistical model which described the data included the
effects of year and season of the first farrowing, the additive direct and maternal genetic effects, the direct specific and the average maternal heterosis effects. Direct and maternal
additive genetic effects had no significant influences on FI. The direct specific and average maternal heterosis effects were negative but nonsignificant (p>0.05). The average direct and
maternal heterosis values were -4.35 and -1.77 days, respectively. In conclusion, the negative constants for the heterosis effects, although non significant (p>0.05), suggest a better
reproductive performance for the crossbred sows as compared with the purebreds. |
| publisher |
Colegio de Postgraduados |
| publishDate |
1996 |
| url |
https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1421 |
| work_keys_str_mv |
AT seguracorreajosec estimatesofadditiveandheteroticgeneticeffectsforthefarrowingintervalofsowsinatropicalenvironment AT seguracorreajosec estimaciondeefectosgeneticosaditivosydeheterosisparaelintervaloentrepartosdecerdasencondicionestropicales |
| _version_ |
1807208644028137472 |