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Relationships between ovulation rate, prenatal survival and litter size in French Large White pigs

Published online by Cambridge University Press:  02 September 2010

A. Blasco ,
J. Gogué  and
J. P. Bidanel
A. Blasco
Affiliation:
Departamento de Ciencia Animal, Universidad Politécnica de Valencia, PO Box 22012, Valencia 46071, Spain
J. Gogué
Affiliation:
Institut National de la Recherche Agronomique, Domaine de Galle, 18520 Avord, France
J. P. Bidanel
Affiliation:
Institut National de la Recherche Agronomique, Station de Génétique Quantitative et Apliquée, Domaine de Vilvert, Jouy-en-Josas 78352 Cedex, France
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Abstract

The relationship between total number born (TNB), ovulation rate (CL) and prenatal survival was analysed in a French Large White population. The left ovary had a significantly (P < 0·01) higher ovulation rate (7·9) than the right ovary (6·9). Prenatal survival showed an ovum wastage of 35 or 37% depending on whether referred to total number born or number born alive. No differences between parities were found in these traits. There was a negative relationship between ovulation rate at both sides (v = −0·34). There was a negative relationship between CL and prenatal survival (r = −0·37), a low correlation between CL and TNB (i = 0·19), and a high positive correlation between prenatal survival and TNB (i = 0·82). Litter size showed a quadratic relationship with ovulation rate, and the individual variation for each class of ovulation rate was found to be high. The relationship between prenatal survival and ovulation rate was found to be linear, and a high individual variation for each class of litter size was also found. The relationships between prenatal survival and litter size were quadratic, but depended much less on individual variation.

Keywords

litter sizeovulation ratepigsprenatal
Type
Research Article
Information
Animal Science , Volume 63 , Issue 1 , August 1996 , pp. 143 - 148
Copyright
Copyright © British Society of Animal Science 1996

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