The Nutrient Content of the Eggs of Five Breeds of Hen

“…Although differences within heavy breeds and strains of White Leghorns might exist, these were not significant under Howes and Hutt's conditions. Arroyave, Scrimshaw and Tandon (1957) did not confirm that White Leghorns had more thiamine in their eggs. They did find that, when compared with heavy breeds, the White Leghorns had more vitamin A.…”

Section: Miscellaneous Characterscontrasting

confidence: 61%

The genetic basis of egg quality

Baker

1960

British Poultry Science

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“…No changes in hatchability between the cholesterol lines were observed. INTRODUCTION The amount of cholesterol found in egg yolk varies between breeds and strains (Arroyave et al, 1957;Edwards et al, 1960;Chavous et al, 1965;Collins et ah, 1968;Turk and Barnett, 1971). Studies of the genetic variability in randombred populations (Nix, 1972;Washburn and Nix, 1974a), and in a closed population (Cunningham et al, 1974) have found a range of heritability estimates which are similar to those for egg production.…”

mentioning

confidence: 88%

Changes in fitness traits associated with selection for divergence in yolk cholesterol concentration

Washburn

Marks

1977

British Poultry Science

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1. Correlated changes in egg production, hatchability, egg weight, age at sexual maturation and body weight of lines selected for divergence in yolk cholesterol were studied in two different populations.2. Divergence in yolk cholesterol resulted in a highly significant difference in percentage egg production with a negative correlation between yolk cholesterol and egg numbers. However, the calculated total daily mass of cholesterol excreted into the egg was similar in both lines.3. These results indicate that the physiological mechanism by which these populations responded to selection pressure on the concentration of cholesterol in the yolk was by changing egg numbers rather than total amount of cholesterol excreted.4. Body weights of the high and low yolk cholesterol lines of the meat type, but not of the layer-type populations, were significantly different. After four generations the line selected for low yolk cholesterol from the meat-type population weighed 80% of the line selected for high yolk cholesterol levels.5. Sexual maturity and egg weight were also significantly different between the high and low yolk cholesterol lines, but these differences could not be related to selection response. No changes in hatchability between the cholesterol lines were observed.

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The Nutrient Content of the Eggs of Five Breeds of Hen

Cited by 18 publications

References 13 publications

Studies on the Cholesterol Content of Eggs from Various Breeds and/or Strains of Chickens

Studies on the Cholesterol Content of Eggs from Various Breeds and/or Strains of Chickens

The genetic basis of egg quality

Changes in fitness traits associated with selection for divergence in yolk cholesterol concentration

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