tailieunhanh - Báo cáo sinh học: "Esterase variation among Argentine populations of Trimerotropis pallidipennis"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Esterase variation among Argentine populations of Trimerotropis pallidipennis | Genet Sei Evol 1990 22 279-288 Elsevier INRA 279 Original article Esterase variation among Argentine populations of Trimerotropis pallidipennis Orthoptera VA Confalonieri JC Vilardi BO Saidman Universidad de Buenos Aires Faculdad de Ciencias Exactas y Naturales Departamento de Ciencias Biológicas 1428 Buenos Aires Argentina Received 4 January 1989 accepted 10 March 1990 Summary - Isozyme studies were carried out in 3 populations of Trimerotropis palli-dipennis from Tucumán and San Luis Provinces TÚ SL1 and SL2 Argentina . The purposes of this study were determination of the numbers of genes and alleles involved in the production of the isozymes and their frequencies detection of diagnostic loci for population identification and measuring the genetic variability and the degree of genetic differentiation among populations. With this aim the esterase EST isozyme system was studied and 6 loci were analysed Est 1 to Est 6 . The EST patterns allowed population samples from different biogeographic provinces to be distinguished. Qualitative differences between populations were observed in the expression of some loci Est 1 Est 2 and Est 3 and the presence of additional alleles for other ones Est 5 and Est 6 characterizing TU were also detected. Therefore this differentiation among populations refers to both gene expression and allelic frequencies which may represent 2 distinct responses to environmental differences. Possible correlations of genetic and chromosomal variation are also discussed. orthoptera isozyme esterase Trimerotropis I genetic variation Resume - Variabilité des estệrases dans des populations argentines de Triraerotropis paỉỉidipennis Orthoptères . Trots populations. de Trimerotropis pallidipennis situées dans les provinces de Tucuman et San Luts TU SLi et SL2 Républiqueargentine ont etc étudiées afin de determiner le nombre de genes et d alleles responsables de la synthèse des isoenzymes esterasiques d identifier les locus pouvant caractériser des .