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- W1994311412 abstract "Abstract Three base populations of turkeys were used to study the influence of selection for increased number of settable eggs produced by hens housed in individual cages on the number of settable eggs and the total number of eggs laid. The base populations were E, previously selected over 12 generations for increased egg production; L, selected over 10 generations for decreased plasma corticosterone in response to cold stress at 4 wk of age; and 1, selected for both increased egg production and increased 16-wk body weight by means of a selection index. In the 2nd to the 8th generations, the selected lines were grown in cages from hatching throughout the egg production period. Females of the selected lines were chosen on the basis of their dams’ performance, whereas males were selected at random within lines. Selected lines were compared with a randombred control population in the base generation and in Generations 5 through 8. Control hens were grown in floor pens in all generations. Selection increased the number of settable eggs, but the gains were small (3.2 to 5.6 eggs/hen per line over a 112-day production period in eight generations) due to low selection intensity (selection differentials averaged 3.4 to 3.7 settable eggs/hen per generation) and low realized heritability (. 10 to .21). Most of the gain in the numbers of settable eggs could be attributed to an increase in the total number of eggs laid." @default.
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- W1994311412 date "1987-10-01" @default.
- W1994311412 modified "2023-09-24" @default.
- W1994311412 title "Egg Production of Cage-Housed Turkey Hens from Three Lines Selected for Increased Number of Settable Eggs" @default.
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- W1994311412 doi "https://doi.org/10.3382/ps.0661571" @default.
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