Showing papers by "Roger K. Butlin published in 1992"
TL;DR: To study the evolution of this Pyrenean hybrid zone following postglacial secondary contact, a crossing programme was performed involving sequential mating of single females by males of both subspecies in both orders, revealing a number of significant departures from straightforward inheritance.
Abstract: Asymmetrical homogamy and unequal sex ratio from reciprocal mating-order crosses between Chorthippus parallelus subspecies
86 citations
TL;DR: Hybrid dysfunction did not occur amongst the offspring of randomly mated hybrid females, demonstrating that the lack of dysfunction within these populations is not due to the evolution of assortative mating within them.
Abstract: We have examined the fitness consequences of random and potentially non-random matings within two populations taken from inside, and two from outside a hybrid zone in Chorthippus parallelus. When given the opportunity to mate non-randomly, females from all populations laid egg pods more quickly than females obliged to mate at random. A range of fitness parameters measured on the offspring did not show increased fitness following potential non-random mating for any population. However, in non-hybrid populations, the sons of non-randomly mated females had about twice the mating success of the sons of those females forced to mate at random, suggesting the existence of heritable variation for male reproductive success. Hybrid dysfunction did not occur amongst the offspring of randomly mated hybrid females, demonstrating that the lack of dysfunction within these populations is not due to the evolution of assortative mating within them.
27 citations
TL;DR: The present course of a hybrid zone can often be interpreted in terms of range expansion from glacial refugia into new areas of suitable habitat and this interpretation can give useful insight into the history of the interacting taxa.
Abstract: Many species are subdivided into geographical races or subspecies whose ranges do not overlap but may meet. Where ranges do meet, hybrid zones may form, and these have now been described in a large number of species (Barton & Hewitt, 1985,1989; Hewitt, 1988). The majority of these hybrid zones are believed to be maintained by a balance between dispersal and selection against hybrids and to have formed as a result of secondary contact between populations that had accumulated genetic differences in allopatry (Barton & Hewitt, 1985). The evidence for a secondary origin, rather than divergence in sifu in response to environmental selection pressures, is mainly indirect and includes the coincidence of clines in many characters, the absence of ecological correlates of cline position on a local scale, and the positions of zones on a broad scale (Endler, 1977; Barton & Hewitt, 1985, 1989; Hewitt, 1988). The present course of a hybrid zone can often be interpreted in terms of range expansion from glacial refugia into new areas of suitable habitat and this interpretation can give useful insight into the history of the interacting taxa (for examples see Hewitt, 1989). Two subspecies of the grasshopper Chorthippus parallelus meet and hybridize in the Pyrenees (Butlin & Hewitt, 1985; Hewitt, 1990). C.p.parallelus occurs over most of Europe and east into Asia but is replaced in the Iberian Peninsula by C.p.erythropus. The two taxa differ in many characters (reviewed by Hewitt, 1990) and in the laboratory produce sterile F l male offspring but fertile female hybrids (Hewitt et al., 1987). Clines for several characters have been mapped in detail in two localities Col de la Quillane, Pyrenees-Orientales and Col du Pourtalet,
10 citations
TL;DR: References I Maynard Smith, 1.
Abstract: References I Maynard Smith, 1. (1978) The Evolution of Sex, Cambridge University Press 2 Margulis. L. and Sagan, D. ( 1986) Origins of Sex, Yale University Press 3 Bernstein, H., Byerly, H.C., Hopf, F.A. and Michod, R.E. 11985) Science 229, 1277-1281 4 Hickey, D.A. and Rose, M.R. 11988) in The Evolution of Sex (Michod, R.E. and Levin, B.R., eds), pp. 161-175. Sinauer 5 Bell, C. ( 19821 The Masterpiece of Nature: The Evolution and Genetics of Sexuality, University of California Press 6 Margulis, L. and Schwartz, K.V. (1988) Five Kingdoms (2nd edn), Freeman 7 Hofmeister, W. ( 185 I ) Vergleichende Untersuchungen der Keimung, Entfaltung und Fruchtbildung Htiherer Kryptogamen und der Samenbildung der Coniferen, Leipzig 8 Strasburger, E. (1894) Ann. Bot. 8, 281-316 9 Roe, K.E. ( 1975) The Biologist 57, l-l 3 IO Bower, F.O. ( 19081 The Origin of Land Flora, Macmillan II Svedelius, N. (1927) Bot. Gaz. 83. 362-384 I2 Raper, J.R. and Flexer, AS. ( 1970) Symp. Sot. Gen. Microbial. 20. 401-432 I3 Lewis, W.M., Ir (1985) Am. Nat. 125, 692-70 I I4 Haldane, 1.B.S. 11937) Am. Nat. 71, 337-349 15 Crow, I.F. and Kimura, M. 11965) Am. Nat. 49, 439-450 I6 Charlesworth, B. ( I99 I I Nature 35 I, 273-274 17 Kondrashov, AS. and Crow, j.F. 11991) Nature 351, 314-315 I8 Perrot, V., Richerd, S. and Valero, M. (1991) Nature 351, 315-317 I9 Adams, I. and Hansche, P.E. ( 1974) Genetics 76, 327-338 20 Zhang, XC. and van der Meer, J.P. II9871 Bot. Mar. 30, 309-314 21 Littler, M.M., Littler, D.S. and Taylor, P.R. (1987) /. Phycol. 23, 501-505 22 Hannach, G. and Santelices. B. 11985) Mar. Ecol. Prog. Ser. 22. 291-303 23 Willson. M.F. (1981) Ann. MO. Bat. Card. 68, 275-300 24 Ohno, S. (1970) Evolution by Gene Duplication, Springer-Verlag 25 Otha. T. 11988) Evolution 42, 375-386 26 Lewis, I. and Wolpert, L. (I9791 /. Theor. Biol. 78. 425-438 27 Paquin, C. and Adams, I. 11983) Nature 302, 495-500 28 Cavalier-Smith, T. II9781 1. Cell Sci. 34, 247-278 29 Stebbins, G.L. and Hill, G.f.C. II9801 Am. Nat. I 15, 342-353 30 Williams, G.C. (1975) Sex and Evolution, Princeton University Press 31 Hurst, L.D. 11990) 1. Theor. Bio/. 144, 429-443 32 Keddy, P.A. f 1981 I Am. Nat. 118, 452-454 33 Searles, R.B. 11980) Am. Nat. I 15, 113-120 34 Bold, H.C. 11973) Morphology of P/ants, Harper G Row 35 Graham, L.E. f 19851 Am. SC/. 73, 178-186 36 Littler, M.M. and Littler, D.S. ( 1983) /. Phycol. 19, 425-431 37 Slocum, Cf. (1980) /. Exp. Mar. Biol. Ecol. 46, 99-l IO 38 Lubchenco, J. and Cubit, f. (1980) Ecology 6, 676-687 39 De Wreede. R.D. and Klinger, T. (1988) in Plant Reproductive Ecology: Patterns and Strategies I Lovett Doust, J. and Lovett Doust, L., eds), pp. 267-284. Oxford University Press 40 Umezaki, I. 11977) Acta Phytotaxon. Ceobot. 28, l-18 41 Russell, G. (1986) Oceanogr Mar. Biol. Annu. Rev. 24, 309-377 42 Maggs, CA. ( I9881 Bat Mar. 3 I, 465-490 43 Cabioch, J. (1972) CR. Acad. Sci. Paris 275, 1979-1981 44 Destombe. C., Valero, M., Vernet, P. and Couvet. D. 11989) /. Evol. Biol. 2, 317-338 45 Borgia, G. 11980) Theor. Popul. B/o/. 17, 103-I 28 46 Bull, J.1. I I9831 in Evolution of Sex Determinism Mechanisms (Wakes, D.B. and Scatkin, M.W., eds), Benjamin/Cummings 47 Buss, L.W. ( 1987) The Evolution of Individuality, Princeton University Press
4 citations
TL;DR: Artificial selection for increased assortative mating between two subspecies of the meadow grasshopper, Chorthippus Parallelus parallelus and C. p.
1 citations