tailieunhanh - Báo cáo sinh học: " Genetic structure of the Marseilles cat population: is there really a strong founder effect ?"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Genetic structure of the Marseilles cat population: is there really a strong founder effect ? | Genet ẵel Evol 1994 26 317-331 Elsevier INRA 317 Original article Genetic structure of the Marseilles cat population is there really a strong founder effect M Ruiz-Garcia1 2 1 Instituto de genetica Universidad de Los Andes calle 18 Carrera IE Bogota DC Colombia 2 Gigeem avd virgen Montserrat 207 sexto primera Barcelona 08026 Spain Received 4 February 1992 accepted 21 December 1993 Summary - In a previous study on the Marseilles cat population it was concluded that the small cat colonies were subject to a strong founder effect. A more detailed study with the Gst and Fst genetic diversity statistics and with a spatial autocorrelation analysis shows that for the a non-agouti and tb blotched genes there is neither significant heterogeneity nor spatial autocorrelation. This is probably due to an appreciable gene flow throughout Marseilles although a uniform selection pressure in favour of these alleles cannot be totally ruled out . The o orange allele does not show spatial autocorrelation either but it does show significant heterogeneity which could have been caused by the late introduction of this allele into the population coming from populations with low o frequencies in a sporadic and irregular way although the influence of diversifying selection cannot be completely ruled out . Only this allele o might be influenced by a strong founder effect as stated previously. However the a and tb data do not support the hypothesis of a strong founder effect in these cat colonies. cat genetic structure I founder effect gene flow spatial autocorrelation Resume Structure génétique de la population des chats marseillais y a-t-il réellement un fort effet fondateur Dans une étude précédente sur la population des chats marseillais il avait été conclu que les petites colonies de chats étaient soumises à un fort effet fondateur. Une étude plus détaillée à I aide des statistiques GST et FST diversite génétique et d une analyse d autocorrelation spatiale a montré que pour les alleles a .