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Reproductive performance, retention rate, and age at the third parity according to growth rate and age at first mating in the gilts with a modern genotype
Faccin, Jamil Elias Ghiggi; Laskoski, Fernanda; Lesskiu, Paulo Emílio; Paschoal, Aline Fernanda Lopes; Mallmann, André Luis; Bernardi, Mari Lourdes; Mellagi, Ana Paula Gonçalves; Wentz, Ivo; Bortolozzo, Fernando Pandolfo.
Afiliação
  • Faccin, Jamil Elias Ghiggi; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Laskoski, Fernanda; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Lesskiu, Paulo Emílio; BRF S. A. Lucas do Rio Verde. BR
  • Paschoal, Aline Fernanda Lopes; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Mallmann, André Luis; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Bernardi, Mari Lourdes; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Mellagi, Ana Paula Gonçalves; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Wentz, Ivo; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Bortolozzo, Fernando Pandolfo; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
Acta sci. vet. (Impr.) ; 45: 01-06, 2017. tab
Article em En | VETINDEX | ID: biblio-1457589
Biblioteca responsável: BR68.1
ABSTRACT

Background:

Gilts represent the largest category (18-20%) of female pigs in a breeding herd. Under field conditions, the amplitude of growth rate and age at the first mating of gilts are remarkably higher than the recommendations made by the genetic companies. There are several studies that have considered the management of these animals starting from their introduction to the herd till the mating. It has been noted that the genetic selection constantly promotes evolution that may change certain traits of these animals. However, there is a lack of the studies that evaluate the management strategies suitable for the modern sows. This study, therefore, aimed to evaluate the effect of age and growth rate of gilts at the first mating on productive performance and retention rate until the third farrowing. Materials, Methods &

Results:

The study was performed in a gilt development unit (GDU) with a breeding stock capacity of 1000 females and a goal of 90 gilts mating per week. The groups were retrospectively created according to age ( 0.05) on farrowing rate after first, second, and third mating. The total number of piglets born in the three first farrowing and over three parities were not affected (P > 0.05) by the age and GR at first mating. The retention rate until the third farrowing of gilts inseminated with more than 210 days of age was approximately 7% greater than in the gilts mated younger; however, no statistical difference (P > 0.05) was detected. An effect of the age at the first mating was observed in the age to reach the third farrowing. Gilts mated with less than 210 and more than 210 days reached the third farrowing, respectively, at 604.5 ±1.9 and 625.1 ± 2.7 days of age (P < 0.001).

Discussion:

With a minimum GR of 550 g/d, 180 days of age, and at least 130 kg of weight, gilts are eligible to be inseminated without impairing their litter size, farrowing, and retention rate until the third parity. [...]
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Texto completo: 1 Base de dados: VETINDEX Idioma: En Revista: Acta sci. vet. (Impr.) / Acta sci. vet. (Online) Ano de publicação: 2017 Tipo de documento: Article
Texto completo: 1 Base de dados: VETINDEX Idioma: En Revista: Acta sci. vet. (Impr.) / Acta sci. vet. (Online) Ano de publicação: 2017 Tipo de documento: Article