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Abstract:

Previous studies on allozyme variation in five populations of the grasshopper Dichroplus elongatus along a geographical gradient in Argentina revealed a significant degree of population structuring and a significant association between one of the loci (Aat-1) and latitude. As this could not be entirely explained by historical factors, the possible adaptive significance of this locus or loci in linkage disequilibrium was investigated in the present study, with an emphasis on the role of environmental variables correlated with latitude. The present paper reports a study of the geographical organization of allozyme diversity over a wider range of the distribution of D. elongatus. The relation of allelic frequencies with geographic climatic variables was analysed. We have found (i) that different loci (Aat-1 and Pep-1) covary significantly with different variables, (ii) discordance between genetic and geographical distances, (iii) copious gene flow that would mask allelic frequency differences due solely to genetic drift, (iv) and temporal stability of the gradient found. The results suggest that causes other than drift and migration may explain the observed directional patterns of variation in D. elongatus.

Registro:

Documento: Artículo
Título:An adaptive explanation for geographically structured allozyme variation in Dichroplus elongatus (Orthoptera: Acrididae)
Autor:Sequeira, A.S.; Confalonieri, V.A.; Vilardi, J.C.
Filiación:Depto. de Ciencias Biológicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldez y Costanera N., Buenos Aires, Argentina
Palabras clave:Climatic variables; Clines; Isozymal variants; Acrididae; Dichroplus elongatus; Orthoptera
Año:1997
Volumen:76
Número:1
Página de inicio:33
Página de fin:42
DOI: http://dx.doi.org/10.1007/BF02931767
Título revista:Journal of Genetics
Título revista abreviado:J. Genet.
ISSN:00221333
CODEN:JOGNA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221333_v76_n1_p33_Sequeira

Referencias:

  • Barbujani, G., Detecting and comparing the direction of gene-frequency gradients (1988) J. Genet., 67, pp. 129-140
  • Cigliano, M.M., De Wysiecki, M.L., Lange, C.E., Disminución de la abundancia de Dichroplus maculipennis (Orthoptera: Acrididae) en comunidades del Sudoeste de la provincia de Buenos Aires, Argentina (1995) Rev. Soc. Entomol. Argent., 54, pp. 41-42
  • Confalonieri, V.A., Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orhtoptera): Correlations with geographical gradients (1994) Hereditas, 121, pp. 79-86
  • Endler, J.A., Gene flow and population differentiation (1977) Science, 179, pp. 243-250
  • Felsenstein, J., The theoretical population genetics of variable selection and migration (1976) Annu. Rev. Genet., 10, pp. 253-280
  • Fife, P.C., Peletier, L.A., Clines induced by variable selection and migration (1981) Proc. R. Soc. London B, 214, pp. 99-123
  • Liebermann, J., Los Acridoideos de Chile (1944) Rev. Chil. Hist. Nat., 48, pp. 3-158
  • Mantel, N.A., The detection of disease clustering and a generalized regression approach (1967) Cancer Res., 27, pp. 209-220
  • Matrajt, M., Confalonieri, V., Vilardi, J.C., Parallel adaptive patterns of allozyme and inversion polymorphisms on an ecological gradient (1996) Heredity, 76, pp. 346-354
  • Nei, M., Genetic distances between populations (1972) Am. Nat., 106, pp. 283-292
  • Nei, M., F-statistics and analysis of gene diversity in subdivided populations (1977) Ann. Hum. Genet., 41, pp. 225-233
  • Nei, M., Chesser, R., Estimation of fixation indexes and gene diversities (1983) Ann. Hum. Genet., 47, pp. 253-259
  • Neimann-Sorensen, A., Blood groups and breed structure as exemplified by three Danish breeds (1956) Acta Agric. Scand., 6, pp. 115-137
  • Oakeshott, J.G., Chambers, G.K., Gibson, J.B., Willcocks, D.A., Latitudinal relationships of esterase-6 and phosphoglucomutase gene frequencies in Drosophila melanogaster (1981) Heredity, 47, pp. 385-396
  • Oakeshott, J.G., Gibson, J.B., Anderson, P.R., Knibb, W.R., Anderson, D.G., Chambers, G.K., Alcohol dehydrogenase and glycerol-3-phosphate dehydrogenase clines in Drosophila melanogaster on different continents (1982) Evolution, 36, pp. 86-96
  • Oakeshott, J.G., Chambers, G.K., Gibson, J.B., Eanes, F., Willcocks, D.A., Geographic variation in G6PD and Pgd allele frequencies in Drosophila melanogaster (1983) Heredity, 50, pp. 67-72
  • Oakeshott, J.G., McKechnie, S.W., Chambers, G.K., Population genetics of the metabolically related Adh, Gpdh and Tpi polymorphisms in Drosophila melanogaster. 1. Geographic variation in Gpdh and Tpi allele frequencies in different continents (1984) Genetica, 63, pp. 21-30
  • Powers, D.A., A multidisciplinary approach toward resolving the selectionist/neutralist controversy (1993) Symposium, Seventeenth International Congress of Genetics, p. 60
  • Powers, D.A., Ropson, I., Brown, D.C., Van Beneden, R., Cashon, R., Gonzalez-Villasenor, L.I., Dimichele, J.A., Genetic variation in Fundulus heteroclitus: Geographic distribution (1986) Am. Zool., 26, pp. 131-144
  • Ronderos, R.A., Consideraciones sobre la biogeografia de los Melanoplinae en Sudamerica (Orthoptera: Acrididae) (1985) Proceedings of the Third Triennial Meeting of the Pan American Acridid Society, p. 54
  • Raymond, M., Rousset, F., GENEPOP (v. 1·2): Population genetics software for exact tests and ecumenicism (1995) J. Hered., 86, pp. 248-249
  • Rousset, F., Raymond, M., Testing heterozygote excess and deficiency (1995) Genetics, 140, pp. 1413-1419
  • Sequeira, A., Confalonieri, V., Remis, M.I., Vilardi, J.C., B chromosome and enzyme polymorphisms in Dichroplus elongatus (Orthoptera: Acrididae): Geographical gradients that are not explained by historical factors (1995) Evolucion Biologica, 8-9, pp. 283-299
  • Singh, R.S., Rhomberg, L.Z., A comprehensive study of genic variation in natural populations of Drosophila melanogaster. II Estimates of heterozygosity and patterns of geographic differentiation (1987) Genetics, 117, pp. 255-271
  • Sokal, R.R., Rohlf, F.J., (1981) Biometry. 2nd Edn., , San Francisco: Freeman
  • Vilardi, J.C., Un programa basic para calcular índices de fijación (F) (1989) Mendeliana, 9, pp. 67-68
  • Vilardi, J.C., Programa basic para estimar índices de distancia y variabilidad genética y sus errores a partir de mustras pequeñas (1993) Mendeliana, 9, pp. 67-68
  • Weir, B.S., Cockerham, C.C., Estimating F-statistics for the analysis of population structure (1984) Evolution, 38, pp. 1358-1370
  • Wijsmann, E.M., Cavalli-Sforza, L.L., Migration and genetic population structure with special reference to humans (1984) Annu. Rev. Ecol. Syst., 15, pp. 279-301
  • Wright, S., Evolution in Mendelian populations (1931) Genetics, 16, pp. 97-159
  • Wright, S., The genetical structure of populations (1951) Ann. Eugenics, 15, pp. 323-354
  • Wright, S., The interpretation of population structure by F-statistics with special regard to systems of mating (1965) Evolution, 19, pp. 395-420
  • Zanetto, A., Kremer, A., Geographical structure of gene diversity in Quercus petraea (Matt) Liebl. I. Monolocus patterns of variation (1995) Heredity, 75, pp. 506-517
  • Zapata, S., Food habits of Dichroplus elongatus Giglio-Tos (Orthoptera, Acrididae, Catantopinae) (1987) Acta Entomol. Chil., 14, pp. 59-64

Citas:

---------- APA ----------
Sequeira, A.S., Confalonieri, V.A. & Vilardi, J.C. (1997) . An adaptive explanation for geographically structured allozyme variation in Dichroplus elongatus (Orthoptera: Acrididae). Journal of Genetics, 76(1), 33-42.
http://dx.doi.org/10.1007/BF02931767
---------- CHICAGO ----------
Sequeira, A.S., Confalonieri, V.A., Vilardi, J.C. "An adaptive explanation for geographically structured allozyme variation in Dichroplus elongatus (Orthoptera: Acrididae)" . Journal of Genetics 76, no. 1 (1997) : 33-42.
http://dx.doi.org/10.1007/BF02931767
---------- MLA ----------
Sequeira, A.S., Confalonieri, V.A., Vilardi, J.C. "An adaptive explanation for geographically structured allozyme variation in Dichroplus elongatus (Orthoptera: Acrididae)" . Journal of Genetics, vol. 76, no. 1, 1997, pp. 33-42.
http://dx.doi.org/10.1007/BF02931767
---------- VANCOUVER ----------
Sequeira, A.S., Confalonieri, V.A., Vilardi, J.C. An adaptive explanation for geographically structured allozyme variation in Dichroplus elongatus (Orthoptera: Acrididae). J. Genet. 1997;76(1):33-42.
http://dx.doi.org/10.1007/BF02931767