Effect of Feeding Level on Daily Gains of Pigs

Headley, F. B.

doi:10.2527/jas1946.53251x

Cited by 1 publication

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“…Headley, 1946;Bereskin, Davey, Peters and Hetzer, 1975) have shown that food consumption is associated positively with gain and negatively with gain per unit of food consumed. As the correlation between gain and gain per unit of food consumed or between food intake and food intake per unit of gain is the correlation between a ratio and its numerator there will be an automatic aspect to the relationship.…”

Section: Introductionmentioning

confidence: 98%

Genetic aspects of voluntary food intake in the pig and their association with gain and food conversion efficiency

1979

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Data from 1357 boars ad libitum fed on a performance testing scheme were analysed to explore the genetic aspects of voluntary food intake. The heritabilities of food intake, daily gain and food/ gain were found to be 0-23, 0-41 and 0-18 respectively. The correlations obtained between gain and intake of 0-63 (phenotypic) and 0-89 (genetic) were typical of those reported for ad libitum feeding but greater than those reported for semi-restricted. Estimates of genetic correlation between gain and efficiency ranged from 0-64 to zero and for the phenotypic correlation from 0-44 to zero and were smaller than those reported for restricted feeding. Correlations between intake and efficiency were highly negative on the phenotypic level but small and of variable size genetically, in contrast to reports of small phenotypic and positive genetic correlations under restriction.

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Section: Introductionmentioning

confidence: 98%