Some factors associated with the performance of Duroc swine at 21 days of age

Authors

  • Antonio Pedro Schlindwein Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Francisco Alberto de Moura Duarte Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, SP
  • Luiz Antonio Framartino Bezerra Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Genética e Matemática Aplicada à Biologia, Ribeirão Preto, SP

DOI:

https://doi.org/10.11606/issn.2318-3659.v19i2p189-194

Keywords:

Litter size, Litter weight, Swine performance, Non-genetic factors

Abstract

The effects of year and season of birth and farrowing order on litter size and litter weight at 21 days of age were studied for 529 litters of Duroc swine raised at Estação Experimental de Zootecnia, Sertãozinho, SP, from 1957 to 1970. The mean number of piglets per litter was 5.59 and mean litter weight was25.63 kg. Sow age at farrowing was found to be an important cause of variations in the traits studied. The highest means occurred in general at 34-39 months of sow’s age or at the fourth –fifth farrowing.

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Published

1982-09-15

Issue

Vol. 19 No. 2 (1982)

Section

ZOOTECHNICS

How to Cite

Some factors associated with the performance of Duroc swine at 21 days of age. (1982). Revista Da Faculdade De Medicina Veterinária E Zootecnia Da Universidade De São Paulo, 19(2), 189-194. https://doi.org/10.11606/issn.2318-3659.v19i2p189-194