Differential Effects of Litter Size and Within-Litter Birthweight on Postnatal Traits of Fatty Pigs



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Vázquez Gómez, Marta and Garcia-Contreras, Consolacion and Pesantez-Pacheco, José Luis and Torres-Rovira, Laura and Heras-Molina, Ana and Astiz, Susana and Óvilo, Cristina and Isabel Redondo, Beatriz and González Bulnes, Antonio (2020) Differential Effects of Litter Size and Within-Litter Birthweight on Postnatal Traits of Fatty Pigs. Animals, 10 (5). p. 870. ISSN 2076-2615

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Official URL: https://doi.org/10.3390/ani10050870


Fatty pigs are characterized by a thrifty genotype, adapted to harsh environments based on changes in metabolism and energy saving. Thus, we hypothesized that feto-maternal energy partitioning in large litters might have postnatal effects that might be independent of intrauterine growth restriction (IUGR) processes. Hence, the current work reported the influence of two effects on postnatal performance and carcass and meat quality of purebred Iberian pigs: (a) the effects of the number of piglets in the litter (high vs. low litter size), and (b) the effects of birthweight (low (LBW) vs. normal (NBW)) in large litters. The results confirmed that NBW piglets born in large litters had differences in developmental patterns of weight, back-fat deposition, and fatty acid (FA) composition when compared to NBW piglets from small litters. These results were different from those found in LBW piglets when compared to their NBW counterparts, which showed an initial asymmetrical growth and altered muscle FA composition at slaughtering. The assessment of FA composition indicated better metabolic status in NBW piglets from large litters than in LBW piglets. These data support the concept that the prenatal environment, even when the individual may cope with it, inescapably affects postnatal life.

Item Type:Article
Uncontrolled Keywords:developmental programming; intrauterine growth restriction; pig; postnatal growth; prolificacy
Subjects:Medical sciences > Veterinary > Swine
Medical sciences > Veterinary > Veterinary obstetrics
ID Code:64470
Deposited On:06 Apr 2021 15:47
Last Modified:07 Apr 2021 07:10

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