Genetic control populations: A study of efficiency of six poultry control strains
| Autor: | J. C. Powell, J. C. Bowman |
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| Rok vydání: | 1971 |
| Předmět: | |
| Zdroj: | British Poultry Science. 12:511-528 |
| ISSN: | 1466-1799 0007-1668 |
| DOI: | 10.1080/00071667108415906 |
| Popis: | Synopsis The aim of the experiment was to examine the efficiency of pedigreed random‐bred control populations. It was argued that it was difficult to achieve this aim by the study of the parameters of a single control population, but that a comparison of the contemporaneous performance of two or more control strains over several generations would be more appropriate. Six pedigreed randombred control populations with a planned size of 50 males and 150 females and derived from different base populations representing strains involved in a commercial poultry breeding programme were recorded for eight generations. Some difficulty was experienced in maintaining the populations to the size planned, particularly the Wyandotte strain, and this was associated with low semen production from males and low egg production from females rather than from poor fertility or hatchability. Analysis of data on sexual maturity, 25‐week body weight and 300 days’ egg production indicated no obvious regular changes in mean or vari... |
| Databáze: | OpenAIRE |
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