Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-25T17:14:45.338Z Has data issue: false hasContentIssue false

The effect of different selection intensities on selection response in egg-laying of Tribolium castaneum

Published online by Cambridge University Press:  14 April 2009

R. G. Ruano
Affiliation:
Departamento de Genética, Instituto National de Investigationes Agrarias, Avda. Puerta de Hierro s/n, Madrid – 3, Spain
F. Orozco
Affiliation:
Departamento de Genética, Instituto National de Investigationes Agrarias, Avda. Puerta de Hierro s/n, Madrid – 3, Spain
C. López-Fanjul
Affiliation:
Departamento de Genética, Instituto National de Investigationes Agrarias, Avda. Puerta de Hierro s/n, Madrid – 3, Spain
Rights & Permissions [Opens in a new window]

Summary

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

An experiment was carried out to test the effect of varying selection intensity on the response to individual selection with a fixed number of individuals scored per generation. The selected trait was egg laying of virgin females of Tribolium castaneum scored from the 7th to the 1 lth day after adult emergence. Five different selected proportions of females were considered (5, 10, 20, 33 and 50%) and each treatment was represented by two replicate lines. Control lines were maintained throughout the experiment. The lines selected at the lowest proportions (5 and 10%) led to the largest initial gains, but the largest final gains were achieved, by the lines where the proportions selected were 10 and 20%, in agreement with theory. Lines where the proportion selected was 50% gave the lowest rate of response over the period considered (32 generations). A good agreement was found between predicted and realized short-term responses to selection. Prediction at later stages of selection deteriorated in the most strongly selected lines mainly due to the levels of inbreeding attained.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1975

References

REFERENCES

Clayton, G. A., Morris, J. A. & Robertson, A. (1957). An experimental check on quantitative genetical theory. I. Short-term responses to selection. Journal of Genetics 55, 131151.CrossRefGoogle Scholar
Dickerson, G. E. (1959). Techniques for research in quantitative animal genetics. Techniques and Procedures in Animal Production Research, edited by the American Society of Animal Production, pp. 57105.Google Scholar
Fuentes, M. C. & Orozco, F. (1970). Influencia de diversos factores en la puesta del Tribolium castaneum. II. Influencia de una amplia gama de temperaturas en la puesta. Anales del Instituto Nacional de Investigaciones Agronómicas 19, 375401.Google Scholar
Gall, G. A. E. (1971). Replicated selection for 21-day pupa weight of Tribolium castaneum. Theoretical and Applied Genetics 41, 164173.CrossRefGoogle Scholar
Hanrahan, J. P., Eisen, E. J. & Legates, J. E. (1973). Effects of population size and selection intensity on short-term response to selection for postweaning gain in mice. Genetics 73, 513530.CrossRefGoogle ScholarPubMed
Hill, W. G. (1970). Design of experiments to estimate heritability by regression of offspring on selected parents. Biometrics 28, 767780.CrossRefGoogle Scholar
James, J. W. (1972). Optimum selection intensity in breeding programmes. Animal Production 14, 119.Google Scholar
Jones, L. P., Frankham, R. & Barker, J. S. F. (1968). The effects of population size and selection intensity in selection for a quantitative character in Drosophila. II. Long-term response to selection. Genetical Research, 12, 249266.CrossRefGoogle Scholar
Orozco, F. & Bell, A. E. (1974). A genetic study of egg-laying of Tribolium in optimal and stress environments. Canadian Journal of Genetics and Cytology 16, 4960.CrossRefGoogle ScholarPubMed
Orozco, F. & Tagarro, M. P. (1969). Respuesta a la selección y parámetros de la puesta de huevos en una estirpe de Tribolium castaneum. Boletin del Instituto Nacional de Investigaciones Agronómicas 29, 203220.Google Scholar
Robertson, A. (1970). Some optimum problems in individual selection. Theoretical Population Biology 1, 120127.CrossRefGoogle ScholarPubMed
Smith, C. (1969). Optimum selection procedures in animal breeding. Animal Production 11, 433442.Google Scholar