Global Journal of Science Frontier Research, H: Environment & Earth Science, Volume 23 Issue 2

1 Year 2023 27 © 2023 Global Journals Global Journal of Science Frontier Research Volume XXIII Issue ersion I VII ( H ) North-South Geographical Variation of Chromosome Polymorphism in Mexican Populations of Drosophila Pseudoobscura 15. Olvera , O., J. R. Powell, M. E. de la Rosa, V. M. Salceda, M. I. Gaso, J. Guzmán, W. W. Ander- son and L. Levine. 1979. Population genetics of Mexican Drosophila. VI. Cytogenetics aspects of the inversion polymorphism in Drosophila pseudo- bscura. Evolution 33: 381-395. 16. Olvera, O., V.M. Salceda, L. Levine and J. Guzmán- Rincón. 2005. Chromosomal polymorphism of Drosophila pseudoobscura from Southern Mexico. Rev. Int. Contam. Ambient. 21 (Supl. 1) 27-30. 17. Powel, J.R. 1992. Inversion polymorphism in Drosophila pseudoobscura and Drosophila persimilis. In C. B. Krimbas and J. R. Powell (Editors). Drosophila Inversion Polymorphism. C. R. C. Press. Boca Raton. Pp. 73-126. 18. Salceda, V.M. and J. Espinoza-Velázquez. 2006a. Gradientes geográficos para inversiones del cromosoma III de Drosophila pseudoobscura (Diptera: Drosophilidae) de México. Folia Entomol. Mex. 45 (1): 17-26. 19. Salceda, V. M. and J. Espinoza-Velázquez. 2006b. Micro-geographic variation of inversion polymer- phism in natural populations of Drosophila pseudoobscura. Genetika 38 (2): 97-106. 20. Salceda, V. M., J. Guzmán, O. Olvera and L. Levine. 2007a. Chromosomal variation in natural populations of Drosophila pseudoobscura in habiting Northern Mexico. Southwestern Nat. 52(3): 430-435. 21. Salceda, V. M., J. Guzmán and O. Olvera. 2007b. Inversion polymorphism in some natural popula- tions of Drosophila pseudoobscura from Central Mexico. Genetika 39(3): 343-354. 22. Sturtevant, A.H. 1917. Genetic factors affecting the strength of linkage in Drosophila. Proc. Natl. Acad. Sci. USA.3: 555-558. 23. Soulé, M. 1973. The epistasis cycle: a theory of marginal populations. Ann. Rev. Ecol. Syst. 4: 165- 187.