TAILIEUCHUNG - báo cáo khoa học: "La variation géographique du polymorphisme enzymatique dans les populations de Cepaea nemoralis des Pyrénées françaises"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: La variation géographique du polymorphisme enzymatique dans les populations de Cepaea nemoralis des Pyrénées françaises | Génét. Sél. Evol. 1988 20 4 441-460 La variation géographique du polỵmorphisme enzymatique dans les populations de Cepaea nemoralis des Pyrenees tranộaises Marta VALDEZ I. KASSEM et M. LAMOTTE Université Pcưis-Sud Laboratoừe d Amelioration des Plantes 91405 Orsay Cedex France Ecole Normale Supérieure Laboratoire de Zoologie 46 Rue d Ulm 75230 Paris Cedex 05 France Resume La variation des frequences alléliques à trois locus commandant des caractères de coloration de la Coquille et à neuf locus enzymatiques a été étudiée dans 69 populations de Cepaea nemoralis provenant de plusieurs vallées des Pyrenees franchises. Des modes differents de variation généti-que semblent exister pour les frequences des divers genes des locus enzymatiques et differents aussi de ceux des frequences des caractères phénotypiques de la Coquille Les résultats suggèrent que plusieurs facteurs selectifs et fortuits interviennent dans la differenciation protéinique de ces populations facteurs dont I importance relative depend des conditions locales notamment la sévérité du climat et I intensite de I activite humaine ainsi que de 1 histoire evolutive de ces populations. Mots clés Cepaea variation enzymatique polymorphisme effet de fondation selection clima-tique. Summary Geographic variation of enzyme polymorphism in populations of Cepaea nemoralis from the French Pyrenees The variation of allele frequencies at three shell loci and at nine enzyme loci has been investigated in 69 populations of Cepaea nemoralis in several valleys of the French Pyrénées. Different modes of genetic variation appear to exist for the frequencies of various enzyme loci which are also different from those of the phenotypic characters frequencies of shell. Results show that several selective and random factors are involved in the protein differentiation of these populations. The relative importance of these factors varies with local conditions notably the degree of climate severity and the intensity of human activity as

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