Population Genetics of Drosophila Amylase. V. Genetic Background and Selection on Different Carbohydrates

AUTOR(ES)

Powell, Jeffrey R.

RESUMO

Frequency changes in amylase allozymes and patterns of tissue-specific expression of amylase have been monitored in laboratory populations of Drosophila pseudoobscura maintained on media in which the only carbohydrate source was maltose or starch. Nonrandom changes occurred in patterns of expression, whereas no patterns in allozyme frequency changes were discernible. The nature of the pattern changes was similar to an identical study done on populations derived from a natural population several hundred miles from the population used in the present experiments. However, in the previous study nonrandom changes in allozyme frequencies were also noted. Evidently, selection on the Drosophila amylase system differs depending upon the genetic background of the population. Furthermore, the evolutionary dynamics of structural gene variants and those regions controlling its expression may be independent, a result consistent with DNA sequence data.

Documentos Relacionados

• Population Genetics of Drosophila Amylase. IV. Selection in Laboratory Populations Maintained on Different Carbohydrates
• Population Genetics of Drosophila Amylase. I. Genetic Control of Tissue-Specific Expression in D. PSEUDOOBSCURA
• Population Genetics of Drosophila Amylase. II. Geographic Patterns in D. PSEUDOOBSCURA
• Studies on Natural Populations of Drosophila. V. Correlated Response to Selection in DROSOPHILA MELANOGASTER
• The Molecular through Ecological Genetics of Abnormal Abdomen in Drosophila Mercatorum. V. Female Phenotypic Expression on Natural Genetic Backgrounds and in Natural Environments