Abstract
Past allozyme studies have shown a very low level of genetic variation among aphid populations. Attempts have been made to link this lack of diversity to the biological characteristics of aphids. This study examines the effect of host-alternation on genetic diversity in Canadian populations of the aphid Rhopalosiphum padi. Allozyme analysis of 15 populations on the primary host and 14 on the secondary hosts revealed polymorphism at only three of 51 loci. Little geographical differentiation was observed among populations from a single host category. However, gene frequency differences were noted between populations on primary and those on secondary hosts at two of three polymorphic loci and the mean heterozygosity was substantially reduced on secondary hosts. This pattern might result from the admixture on secondary hosts of resident clones and relatively invariant migrants from southern areas. Alternatively, the decreased heterozygosity might result from either a selective disadvantage of heterozygotes on secondary hosts or their selective migration to other hosts.
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Adams, J B, and Drew, M E. 1964. Grain aphids in New Brunswick. I. Field development on oats. Can J Zool, 42, 735–740.
Ayala, E J. 1982. Genetic variation in natural populations: problems of electrophoretically cryptic alleles. Proc Natl Acad Sci USA, 79, 550–554.
Blackman, R L. 1990. Specificity in aphid-plant interactions with particular attention to the role of the alate colonizer. In: Campbell, R. K. and Eikenbary, R. D. (eds) Aphid-Plant Genotype Interactions, pp. 251–274. Elsevier, Amsterdam.
Blackman, R L, and Eastop, V F. 1984. Aphids on the World's Crops An Identification Guide. John Wiley and Sons, Chichester.
Boileau, M G, Hebert, P D N, and Schwartz, S S. 1992. Non-equilibrium gene frequency divergence: persistent founder effects in natural populations. J Evol Biol, 5, 25–39.
Daly, J C. 1989. The use of electrophoretic data in a study of gene flow in the pest species Heliothis armigera (Hubner) and H. punctigera (Wallengren) (Lepidoptera: Noctuidae). In: Loxdale, H. D. and Den Hollander, J. (eds) Electrophoretic Studies on Agricultural Pests, pp. 115–141. Clarendon Press, Oxford.
Dedryver, C A, and Gelle, A. 1982. Biologie des pucerons des céréales dans l'ouest de la France. IV. -Etude de l'hivernation des populations anholocycliques de Rhopalosiphum padi L., Metopolophium dirhodum Wlk. et Sitobion avenae F. sur repousses de céréales dans trois stations de Bretagne et du Bassin parisien. Acta Oecologica Oecol Applic, 3, 321–342.
Eggers-Schumacher, H A, and Sander, E. 1988. Spatial and seasonal genetic (allozyme) variation within field populations of Phorodon humuli Schrank (Homoptera: Aphididae). The Entomologist, 107, 110–121.
Fitch, A. 1855. The first report on the noxious, beneficial and other insects of the state of New York. Trans N Y Agric Soc, 14, 705–880.
Forbes, A R. 1962. Aphid populations and their damage to oats in British Columbia. Can J Plant Sci, 42, 660–666.
Graur, D. 1985. Gene diversity in Hymenoptera. Evolution, 39, 190–199.
Hebert, P D N. 1987. Genotypic characteristics of cyclic parthenogens and their obligately asexual derivatives. In: Stearns, S. J. (ed) The Evolution of Sex and its Consequences, pp. 175–195. Birkhaüser Verlag, Basel.
Hebert, P D N, and Beaton, M J. 1989. Methodologies for Allozyme Analysis Using Cellulose Acetate Electrophoresis. Helena Laboratories, Beaumont, TX.
Hebert, P D M, Finston, T L, and Foottit, R. 1991. Patterns of genetic diversity in the sumac aphid, Melaphis rhois. Genome, 34, 757–762.
Loxdale, H D. 1990. Estimating levels of gene flow between natural populations of cereal aphids (Homoptera: Aphididae). Bull ent Res, 80, 331–338.
Loxdale, H D, and Brookes, C P. 1988. Electrophoretic study of enzymes from cereal aphid populations. V. Spatial and temporal similarity between holocyclic populations of the bird cherry oat aphid Rhopalosiphum padi (L.) (Hemiptera: Aphididae) in Britain. Bull ent Res, 78, 241–249.
Loxdale, H D, and Brookes, C P. 1990. Temporal genetic stability within and restricted migration (gene flow) between local populations of the blackberry-grain aphid Sitobion fragariae in south-east England. J Anim Ecol, 59, 495–512.
Loxdale, H D, Tarr, I J, Weber, C P, Brookes, C P, Digby, P G N, and Castanera, P. 1985. Electrophoretic study of enzymes from cereal aphid populations. III. Spatial and temporal genetic variation of populations of Sitobion avenae (F.) (Hemiptera: Aphididae). Bull ent Res, 75, 121–141.
Loxdale, H D, Hardie, J, Halbert, S, Foottit, R, Kidd, A C, and Carter, C I. 1993. The relative importance of short-and long-range movement in flying aphids. Biol Rev, 68, 291–311.
Markkula, M, and Roukka, K. 1972. Resistance of cereals to the aphids Rhopalosiphum padi (L.) and Macrosiphum avenae (F.) and fecundity of these aphids on Gramineae, Cyperaceae and Juncaceae. Ann Agric Fenn, 11, 417–423.
Nei, M. 1977. F-statistics and analysis of gene diversity in subdivided populations. Ann Hum Genet, 41, 225–233.
Nevo, E. 1978. Genetic variation in natural populations: patterns and theory. Theor Pop Biol, 13, 121–177.
Rautapää, J. 1970. Preference of cereal aphids for various cereal varieties and species of Gramineae, Juncaceae and Cyperaceae. Ann Agric Fenn, 9, 267–277.
Rhomberg, L R, Joseph, S, and Singh, R S. 1985. Seasonal variation and clonal selection in cyclically parthenogenetic rose aphids (Macrosiphum rosae). Can J Genet Cytol, 27, 224–232.
Simon, J P, Parent, M A, and Auclair, J L. 1982. Isozyme analysis of biotypes and field populations of the pea aphid Acyrthosiphon pisum. Entomologia exp appl, 32, 186–192.
Simon, J-C, Blackman, R L, and Le Gallic, J F. 1991. Local variability in the life-cycle of the bird cherry-oat aphid, Rhopalosiphum padi (Homoptera: Aphididae) in western France. Bull ent Res, 81, 315–322.
Swofford, D L, and Selander, R B. 1989. BIOSYS-1. A Computer Program for the Analysis of Allelic Variation in Population Genetics and Biochemical Systematics. Illinois Natural History Survey, Urbana, IL.
Tomiuk, J, and Wörhmann, K. 1980. Enzyme variability in populations of aphids. Theor Appl Genet, 57, 125–127.
Tomiuk, J, and Wörhmann, K. 1983. Enzyme polymorphism and taxonomy of aphid species. Z Zool Syst Evolutionsforsch, 21, 266–274.
Wörhmann, K, and Tomiuk, J. 1989. Study of the variation of aphid populations using enzymes and other traits. In: Loxdale, H. D. and Den Hollander, J. (eds) Electrophoretic Studies on Agricultural Pests, pp. 203–229. Clarendon Press, Oxford.
Wool, D, Bunting, S, and Van Emden, H F. 1978. Electrophoretic study of genetic variation in British Myzus persicae (Sulz.) (Hemiptera: Aphididae). Biochem Genet, 16, 987–1006.
Wright, S. 1965. The interpretation of population structure by F-statistics with special regard to systems of mating. Evolution, 19, 395–420.
Wright, S. 1978. Evolution and the Genetics of Populations, vol 4, Variability Within and Among Natural Populations. University of Chicago Press, Chicago.
Young, J P W. 1983. The population structure of cyclic parthenogens. In: Oxford, G. S. and Rollinson, B. (eds) Protein Polymorphism: Adaptative and Taxonomic Significance, pp. 362–378. Academic Press, London.
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Simon, JC., Hebert, P. Patterns of genetic variation among Canadian populations of the bird cherry-oat aphid, Rhopalosiphum padi L. (Homoptera: Aphididae). Heredity 74, 346–353 (1995). https://doi.org/10.1038/hdy.1995.52
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DOI: https://doi.org/10.1038/hdy.1995.52