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Revista Científica

versión impresa ISSN 0798-2259

Resumen

MARTINEZ GAMBA, Roberto; SALMERON SOSA, Frida  y  LOPEZ ALCANTAR, Manuel. Estimated Heritability and Comparison of Pure Genotypes in Pigs of Duroc, Landrace and Yorkshire Breeds and Reciprocal Crosses of Landrace and Yorkshire Breeds for Back Fat and Weight to 154 Days. Rev. Cient. (Maracaibo) [online]. 2006, vol.16, n.2, pp.142-148. ISSN 0798-2259.

Were used 2776 records of growing pigs from 1996 to 2002, of which 698 was Duroc, 276 Landrace, 443 Yorkshire, 1049 Landrace-Yorkshire and 309 Yorkshire-Landrace to evaluate back fat to 105 kg and weight to 154 days. For weight effects as age, breed, sex, and the interactions age by breed, age by sex and age by breed and by sex. Landrace pigs were heavier but there wasn’t difference between Duroc and Yorkshire animals. The male were heavier than females. Also for back fat effects as age, breed, sex and the interactions age by breed and age by breed and by sex. The fattiest breed was Duroc and the breed with leaner back fat was Yorkshire. The cross Yorkshire-Landrace was heavier but fattier than Landrace-Yorkshire. The heritability for weight to 154 days was 0.26, 0.50 and 0.45 to Duroc, Landrace and Yorkshire respectively. For back fat the heritability was 0.32, 0.18 and 0.53.

Palabras clave : Heritability; back fat; weight to 154 days; breed pigs.

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