Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Adaptative significance of amylase polymorphism in Drosophila. III. Geographic patterns in Drosophila subobscura tissue-specific expression of amylase in adult midgut | Genet Sei Evol 1991 23 197-204 Elsevier INRA 197 Original article Adaptative significance of amylase polymorphism in Drosophila. III. Geographic patterns in Drosophila subobscura tissue-specific expression of amylase in adult midgut M Andjelkovic M Stamenkovic-Radak M Sekulic M Milanovic University of Belgrade Institute of Biological Research 29 Novembra 142 11000 Belgrade Yugoslavia Received 8 March 1990 accepted 10 March 1991 Summary - Eight natural populations of D subobscura Collin were studied for genetically controlled variation in tissue-specific expression of a-amylase enzyme. Polymorphism for amylase tissue variation in the midgut was found to be present in natural populations. This type of phenotypic variability showed intra- and interpopulation variability. The geographic variation in a-amylase midgut activity patterns of gene expression was found to be uncorrelated with allozyme variation at the structural locus. There was no detectable correlation of activity patterns in the anterior midgut with those in the posterior midgut. Drosophila subobscura a-amylase tissue-specific expression inter- and intrapopulation variability Resume - Signification adaptive du polymorphisme de 1 amylase chez Drosophila. III. Variation géographique de 1 expression de 1 amylase dans 1 intestin moyen de 1 adulte de Drosophila subobscura. Huit populations naturelles de Drosophila subobscura ont été étudiées et se sont révélées polymorphes pour I expression tissulaire de I amylase a dans I intestin moyen. Il existe un polymorphisme intra- et interpopulationnel. Il n existe pas de correlation entre I activite amylasique dans la partie aniérieure et postérieure de I intestin moyen pas plus qu avec le polymorphisme au locus structural. Drosophila subobscura amylase a I expression tissulaire variabilité inter- et intrapopulation Correspondence and reprints 198 M Andjelkovic ei al INTRODUCTION A number of authors have suggested that changes in genetic regulation are of major .
