tailieunhanh - Báo cáo khoa hoc:" Adaptive significance of amylase polymorphism in Drosophila. Analysis of the association between tissue-specific expression and specific activity in Amy or Amy genotypes F S of Drosophila subobscura"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Adaptive significance of amylase polymorphism in Drosophila. Analysis of the association between tissue-specific expression and specific activity in Amy or Amy genotypes F S of Drosophila subobscura | 91 Genet. Sei. Evol. 31 1999 91-99 Inra Elsevier Paris Note Adaptive significance of amylase polymorphism in Drosophila. Analysis of the association between tissue-specific expression and specific activity in Am or AmyF genotypes of Drosophila subobscura Tatjana Terzica Mirjana Milanovica Mile Ivanovic b Marina Stamenkovic-Radakac Marko Andjelkovic a c a Department of Genetics Institute for Biological Research 29 novembra 142 11000 Belgrade Serbia Yugoslavia b Maize Research Institute Zemun Polje Slobodana Bajica 1 11081 Belgrade Serbia Yugoslavia c Faculty of Biology University of Belgrade Akademski trg 16 11000 Belgrade Serbia Yugoslavia Received 5 January 1998 accepted 2 December 1998 Abstract - The phenotypic variability at the level of the specific activity of a-amylases and their tissue-specific expression in the midgut of adult Drosophila subobscura flies homozygous for the AmyS or AmyF allele was analysed. The results indicate a homogeneous distribution of the phenotypes with a different numbers of a-amylase activity regions in the adult midgut between the lines homozygous for Amys and AmyF alleles. The mean number of a-amylase midgut activity differs significantly only between the groups of lines homozygous for AmyS with the specific activity of the enzyme above the average and the groups of AmyF homozygote with a significantly lower mean specific activity of amylase. The analysis suggests the existence of compensation between the number of active regions and the specific activity of a-amylase within Amys and AmyF lines. Inra Elsevier Paris Drosophila amylase tissue-specific expressions specific activity of the enzymes polymorphisms Correspondence and reprints E-mail tanjat@ 92 T. Terzic et al. Resume - Signification adaptative du polymorphisme de 1 amylase chez Drosophila. Analyse de 1 association entre 1 expression tissulaire et 1 activité specifique des genotypes AmyS et AmyF chez Drosophila subobscura. La variabilité phéno-typique de

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