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Journal of Animal Science, Vol 68, Issue 7 1936-1943, Copyright © 1990 by American Society of Animal Science

JOURNAL ARTICLE

Relationships between adipose tissue characteristics of newborn pigs and subsequent performance: III. Histological and chemical characteristics of backfat

G. Geri, B. M. Poli, A. Zappa, G. Campodoni and O. Franci
Dipartimento di Scienze Zootecniche, Universita degli Studi, Florence, Italy.

Genetic and phenotypic relationships between adipose tissue characteristics of 253 piglets aged 8 d and qualitative characteristics of their backfat at 95 and 145 kg live weight were studied. Heritability of these qualitative aspects was estimated as well. Backfat samples were tested for cellularity, moisture, lipid content and fatty acid composition of the outer and inner layers. Adipose cellularity at birth proved to be correlated with cell volume, moisture and total unsaturated fatty acid, C18:0 and C18:2 contents present in backfat at slaughter. Estimates of heritability calculated for the outer layer of backfat indicated that progress can be made by selecting for water content and fatty acid composition. Neonatal cellularity furnishes a useful indicator not only of the backfat cell size at slaughter but also of the chemical factors important in determining the physical and organoleptic characteristics of porcine fat.




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Copyright © 1990 by the American Society of Animal Science.