Título

Breed and environmental factors of sows and their repeatabilities in central Mexico

Autor

JOSE CANDELARIO SEGURA CORREA

JOSE HERRERA CAMACHO

ROSA ELENA PEREZ SANCHEZ

ERNESTINA GUTIERREZ VAZQUEZ

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

BIOLOGÍA Y QUÍMICA - (CTI) MEDICINA Y CIENCIAS DE LA SALUD - (CTI) Farrowing to service interval - ([urn:issn:0120-0690]) Litter size - ([urn:issn:0120-0690]) Pigs born alive - ([urn:issn:0120-0690]) Total pigs born - ([urn:issn:0120-0690]) Weaning to service interval - ([urn:issn:0120-0690])

Resumen o descripción

Background: reproductive traits influence lifetime productivity of sows. Objective: to determine the effects of year and season of farrowing, parity number, and breed, on litter size at birth, weaning to service interval (WSI), farrowing to service interval (FSI), and to estimate their repeatabilities. Methods: data from years 1998 to 2008 from a farm in La Piedad, Michoacan, Mexico, were used. Sow breeds were Camborough 22 (PIC), Yorkshire (Y), F1 Landrace x Yorkshire (F1 LY), and ¼ Landrace x ¾ Yorkshire (LY3/4). The studied traits were total pigs born at birth (TPB, n = 45,798), number of pigs born alive (PBA, n = 45,798), WSI (n = 41,156), and FSI (n = 41,156). The statistical model for TPB and PBA included the effects of farrowing year, farrowing season, parity number, breed, and year/season interaction. The model for WSI and FSI included the above factors plus the linear and quadratic effects of lactation length. Results: the overall means for TPB, PBA, WSI, and FSI were 9.31 pigs, 8.60 pigs, 7.87 days, and 29.9 days, respectively. All effects included in the statistical models were significant (p<0.05), except season for TPB and PBA. TPB and PBA increased up to parity 4 and decreased thereafter. The LY3/4 and PIC breed groups had the highest litter size means. The shortest WSI and FSI corresponded to the fall season and the largest to the summer season. WSI and FSI decreased with parity. The Y breed had the shortest and the F1 LY sows had the highest WSI and FSI. The repeatability estimates for TPB, PBA, WSI, and FSI were 0.13, 0.12, 0.14, and 0.14, respectively. Conclusions: year, parity, breed, and lactation length affected litter size, WSI, and FSI. Repeatabilities were low, suggesting that environmental factors are more important than genetic factors for improving the reproductive traits.

Fecha de publicación

31 de marzo de 2015

Tipo de publicación

Artículo

Recurso de información

http://redi.uady.mx:8080/handle/123456789/1752

Formato

application/pdf

Fuente

urn:issn:0120-0690

Idioma

Inglés

Cobertura

Investigación aplicada

Audiencia

Investigadores

Repositorio Orígen

Repositorio Digital Institucional de la Universidad Autónoma de Yucatán

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