Abstract
Genetic variability of quantitative traits was investigated in aMoroccan population of Drosophila melanogaster, with an isofemale line design. Results were compared with data previously obtained from French populations. Although the environmental and thermal conditions are very different in France and Morocco, only two significant differences were observed: a shorter wing and a lighter abdomen pigmentation in Morocco. It is, therefore, concluded that Moroccan D. melanogaster are quite typical temperate flies, belonging to the Palaearctic region, and very different from the ancestral Afrotropical populations. Almost all traits were genetically variable, as shown by significant intraclass correlations among lines. Genetic correlations were highly significant among three size-related traits, while much lower between size and bristle numbers. Fluctuating asymmetry was greater for abdominal bristles than for sternopleural bristles. Sex dimorphism, analysed as a female/male ratio, was identical in French and Moroccan populations. Examination of the thorax length/thorax width ratio showed that the thorax is more elongated in females. Sexual dimorphism of wing length was significantly more correlated to thorax width than to thorax length. The results illustrate the value of measuring numerous quantitative traits on the same flies for characterizing the genetic architecture of a natural population. In several cases, and especially for genetic correlations, some interesting suggestions could be made, which should be confirmed, or invalidated, by more extensive investigations.
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References
Angilletta M. J. and Dunham A. E. 2003 The temperature-size rule in ectotherms: simple evolutionary explanations may not be general. Am. Nat. 162, 332–342.
Angilletta M. J., Steury T. S. and Sears M. W. 2004 Temperature growth rate and body size in ectotherms: fitting pieces of a life history puzzle. Integr. Comp. Biol. 44, 498–509.
Araripe L. O., Yassin A., Klaczko L. B., Moreteau B. and David J. R. 2008 Divergent abdominal bristle patterns in two distantly related drosophilids: antero-posterior variations and sexual dimorphism in a modular trait. Genetica 134, 211–222.
Atkinson D. 1994 Temperature and organism size — a biological law for ectotherms? Adv. Ecol. Res. 25, 1–58.
Azevedo R. B. R., James A. C., McCabe J. and Partridge L. 1998 Latitudinal variation of wing:thorax size ratio and wing-aspect ratio in Drosophila melanogaster. Evolution 52, 1253–1362.
Bocquet C., David J. R. and De Scheemacker-Louis M. 1973 Variabilite du nombre d’ovarioles des souches sauvages de Drosophila melanogaster conservees en laboratoire sans selection volontaire. Arch. Zool. Exp. Gen. 114, 475–489.
Burla H. 1954 Zur Kenntnis der Drosophiliden der elfenbeinkuste (Franzosisch West-Africa). Rev. Suisse Zool. 61, 1–218.
Capy P., Pla E. and David J. R. 1993 Phenotypic and genetic variability of morphometrical traits in natural populations of Drosophila melanogaster and D. simulans. I. Geographic variations. Genet. Sel. Evol. 25, 517–536.
Capy P., Pla E. and David J. R. 1994 Phenotypic and genetic variability of morphometrical traits in natural populations of Drosophila melanogaster and D. simulans. II. Within population variability. Genet. Sel. Evol. 26, 15–28.
Chakir M., David J. R. and Capy P. 1995 Genetic basis of some morphological differences between temperate and equatorial populations of Drosophila melanogaster. Experientia 51, 744–748.
Chakir M., Moreteau B., Capy P. and David J. R. 2007 Phenotypic variability of wild living and laboratory grown Drosophila: consequences of nutritional and thermal heterogeneity in growth conditions. J. Therm. Biol. 32, 1–11
Cowley D. E. and Atchley W. R. 1988 Quantitative genetics of Drosophila melanogaster. II. Heritabilities and genetic correlations between sexes for head and thorax traits. Genetics 119, 421–433.
David J. R. and Bocquet C. 1973 Sur certains caracteres quantitatifs des souches de Drosophila melanogaster provenant du sud du Maroc. C. R. Acad. Sci. Paris 277, 877–880.
David J. R. and Capy P. 1988 Genetic variation of Drosophila melanogaster natural populations. Trends Genet. 4, 106–111.
David J. R., Allemand R., Van Herrewege J. and Cohet Y. 1983 Ecophysiology: abiotic factors. In Genetics and biology of Drosophila (ed. M. Ashburner, H. L. Carson and J. N. Thompson Jr), pp. 105–170. Academic Press, New York.
David J. R., Capy P. and Gauthier J. P. 1990 Abdominal pigmentation and growth temperature in Drosophila melanogaster: similarities and differences in the norms of reaction of successive segments. J. Evol. Biol. 3, 429–445.
David J. R., Gibert P., Mignon-Grasteau S., Legout H., Pétavy G., Beaumont C. and Moreteau B. 2003 Genetic variability of sexual sex dimorphism in a natural population of Drosophila melanogaster: an isofemale line approach. J. Genet. 82, 101–110.
David J. R., Allemand R., Capy P., Chakir M., Gibert P., Pétavy G. and Moreteau B. 2004 Comparative life histories and ecophysiology of Drosophila melanogaster and D. simulans. Genetica 120, 151–163.
David J. R., Gibert P., Legout H., Capy P. and Moreteau B. 2005 Isofemale lines in Drosophila: an empirical approach to quantitative traits analysis in natural populations. Heredity 94, 3–12.
David J. R., Legout H. and Moreteau B. 2006 Phenotypic plasticity of body size in a temperate population of Drosophila melanogaster: when the temperature-size rule does not apply. J. Genet. 85, 9–23.
David J. R., Araripe L., Bitner-Mathe B. C., Capy P., Goni B., Klaczko L. B. et al. 2006 Sexual dimorphism of body size and sternopleural bristle number: a comparison of geographic populations in an invasive cosmopolitan drosophilid. Genetica 128, 109–122.
Dieringer D., Nolte V. and Schlötterer C. 2005 Population structure in African Drosophila melanogaster revealed by microsatellite analysis. Mol. Ecol. 14, 563–573.
Gibert P., Moreteau B., Moreteau J. C. and David J. R. 1996 Growth temperature and adult pigmentation in two Drosophila sibling species: an adaptive convergence of reaction norms in sympatric populations. Evolution 50, 2346–2353.
Gibert P., Capy P., Imasheva A., Moreteau B., Morin J. P., Pétavy G. and David J. R. 2004 Comparative analysis of morphological traits among Drosophila melanogaster and D. simulans: genetic variability, clines and phenotypic plasticity. Genetica 120, 165–179.
Gilchrist A. S. and Partridge L. 1999 A comparison of the genetic basis of wing size divergence in three parallel body size clines of Drosophila melanogaster. Genetics 153, 1775–1787.
Hoffmann A. A. and Parsons P. A. 1997 Extreme environmental change and evolution. Cambridge University Press, Cambridge.
Huey R. B., Moreteau B., Moreteau J. C., Gibert P., Gilchrist G.W., Ives A. R. et al. 2006 Sexual size dimorphism in a Drosophila clade, the D. obscura group. Zoology 109, 318–330.
Karan D., Morin J. P., Gravot E., Moreteau B. and David J. R. 1999 Temporal stability of body size reaction norms in a natural population of Drosophila melanogaster. Genet. Sel. Evol. 31, 491–508.
Karan D., Dubey S., Moreteau B., Parkash R. and David J. R. 2000 Geographical clines for quantitative traits in natural populations of a tropical drosophilid: Zaprionus indianus. Genetica 108, 91–100.
Loeschke V., Bundgaard J. and Barker J. S. F. 2000 Variation in body size and life history traits in Drosophila aldrichi and D. buzzatii from a latitudinal cline in eastern Australia. Heredity 85, 423–433.
Mackay T. F. C. 2001 The genetic architecture of quantitative traits. Annu. Rev. Genet. 35, 303–339.
Mackay T. F. C. 2004 The genetic architecture of quantitative traits: lessons from Drosophila. Curr. Opin. Genet. Dev. 14, 253–257.
Moreteau B., Pétavy G., Gibert P., Morin J. P., Munoz A. and David J. R. 1995 New discriminating traits between females of two sibling species: Drosophila melanogaster and D. simulans (Diptera, Drosophilidae). Ann. Soc. Entomol. Fr. (N.S.) 31, 249–257.
Palmer A. and Strobeck C. 1986 Fluctuating asymmetry: measurement, analysis, patterns. Annu. Rev. Ecol. Syst. 17, 391–421.
Pétavy G., Morin J. P., Moreteau B. and David J. R. 1997 Growth temperature and phenotypic plasticity in two Drosophila sibling species: probable adaptive changes in flight capacities. J. Evol. Biol. 10, 875–887.
Pétavy G., David J. R., Gibert P. and Moreteau B. 2001 Viability and rate of development at different temperatures in Drosophila: a comparision of constant and alternating thermal regimes. J. Therm. Biol. 26, 29–39.
Pétavy G., David J. R., Debat V., Gibert P. and Moreteau B. 2004 Specific effects of cycling stressful temperatures upon phenotypic and genetic variability of size traits in Drosophila melanogaster. Evol. Ecol. Res. 6, 873–890.
Pétavy G., David J. R., Debat V., Pertoldi C. and Moreteau B. 2006 Phenotypic and genetic variability of sternopleural bristle number in Drosophila melanogaster under daily thermal stress: developmental instability and anti-asymmetry. Evol. Ecol. Res. 8, 1–19.
Shakarad M., Prasad N. G., Rajamani M. and Joshi A. 2001 Evolution for faster development does not lead to greater fluctuating asymmetry of sternopleural bristle number in Drosophila. J. Genet. 80, 1–7.
Stalker H. D. 1980 Chromosome studies in wild populations of Drosophila melanogaster. II. Relashionship of inversion frequencies to latitude, season, wing-loading and flight activity. Genetics 95, 211–223.
Statsoft 1999 Statistica, Version 5.5. Statsoft, Tulsa.
Sturtevant A. H. 1942 The classification of the genus Drosophila, with descriptions of nine new species. Univ. Texas Publ. 4213, 5–51.
Tantawy A. O. and Mallah G. S. 1961 Studies on natural populations of Drosophila. I. Heat resistance and geographical variation in D. melanogaster and D. simulans. Evolution 15, 1–14.
Yassin A., Abou-Youssef A., Bitner-Mathe B. C., Capy P. and David J. R. 2007 Developmental stress in wild-living Drosophilids inferred from biometry: metric and meristic traits react differently to heterogeneous environmental conditions. Ecol. Entomol. 32, 1–19.
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Chakir, M., Negoua, H., Moreteau, B. et al. Quantitative morphometrical analysis of a North African population of Drosophila melanogaster: sexual dimorphism, and comparison with European populations. J Genet 87, 373–382 (2008). https://doi.org/10.1007/s12041-008-0060-0
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DOI: https://doi.org/10.1007/s12041-008-0060-0