Abstract
Observations on meiotic diplotene chromosomes from oocytes of Xenopus species and subspecies hybrids are reported. Species interrelationships are established on the basis of the number of bivalents in the respective hybrids. Polyploid oocytes were found and their origin by supplementary endoreduplication placed at the differentiation stage of gametogenesis when oogonia become oocytes. The significance of polyploid oocytes for speciation is discussed.
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References
Blackler, A.W., Fischberg, M.: Hybridization of Xenopus laevis petersi and X.l.laevis. Rev. suisse Zool. 75, 1023–1032 (1968)
Blackler, A.W., Fischberg, M., Newth, D.R.: Hybridization of two sybspecies of Xenopus laevis (Daudin). Rev. suisse Zool. 72, 841–857 (1965)
Blackler, A.W., Gecking, C.A.: Transmission of sex cells of one species through the body of a second species in the genus Xenopus II. Interspecific matings. Develop. Biol. 27, 385–394 (1972)
Blair, W.F.: Evolution in the genus Bufo. Austin and London: Univ. of Texas Press 1972
Blankenhorn, H.J., Heusser, H., Vogel, P.: Drei Phänotypen von Grünfröschen aus dem Rana esculenta-Komplex in der Schweiz. Rev. suisse Zool. 78, 1242–1247 (1971)
Bogart, J.P., Wasserman, A.O.: Diploid-polyploid cryptic species pairs: a possible clue to evolution by polyploidization in anuran amphibians. Cytogenetics 11, 7–24 (1972)
Bytinski-Salz, H.: Verwandtschaftsverhältnisse zwischen den Arten der Gattungen Celerio und Pergesa nach Untersuchungen über die Zytologie und Fertilität ihrer Bastarde. Biol. Zbl. 54, 300–313 (1934)
Callan, H.G., Lloyd, L.: Lampbrush chromosomes of crested newts Triturus cristatus (Laurenti). Phil. Trans. B 243, 135–219 (1960)
Chandley, A.C., Jones, R.C., Dott, H.M., Allen, W.R., Short, R.V.: Meiosis in interspecific equine hybrids. I. The male mule (Equus asinus x E. caballus) and hinny (E. caballus x E. asinus). Cytogenet. Cell Genet. 13, 330–341 (1974)
Cuellar, O.: On the origin of parthenogenesis in vertebrates: The cytogenetic factors. Amer. Naturalist 108, 625–648 (1974)
Darlington, C.D.: The biology of crossing-over. Nature (Lond.) 140, 759–761 (1937)
Delarue, M.: Etude de l'hybridation par la greffe nucléaire et par croisement chez les Bufonides (Amphibiens, Anoures). Ann. Embr. Morph. 7, 425–443 (1974)
Dumont, J.N.: Oogenesis in Xenopus laevis. I. Stages of oocyte development in laboratory maintained animals. J. Morph. 136, 153–179 (1972)
Elinson, R.P.: Viable amphibian hybrids produced by circumventing a block to cross-fertilization (Rana clamitans ♀ x R. catesbeiana ♂). J. exp. Zool. 192, 323–330 (1975)
Fischberg, M., Beatty, R.A.: Heteroploidy in mouse embryos due to crossing of inbred strains. Evolution (Lancaster, Pa.) 6, 316–324 (1952)
Gallien, Cl. L.: Charactères de la spéciation, hybridation expérimentale et hybridation nucléoplasmique dans le genre Pleurodeles (Amphibiens-Urodèles) Soc. Zool. France 94, 293–294 (1969)
Jotterand, M., Fischberg, M.: A chromosome mutation affecting the number of nucleoli in Xenopus borealis Parker. Experientia (Basel) 30, 1003–1005 (1974)
Kawamura, T., Nishioka, M., Kuramoto, M.: Interspecific hybrids between Japanese and European pond frogs. Sci. Rep. Lab. Amphibian Biol., Hiroshima Univ. 1, 277–301 (1972)
Knoepffler, L.-P.: Xenopus fraseri x Xenopus tropicalis, hybride natural d'Amphibiens anoures au Gabon. C.R. Acad. Sci. (Paris) 265, 1391–1393 (1967)
Kobel, H.R., Du Pasquier, L.: Production of large clones of histocompatible, fully identical clawed toads (Xenopus). Immunogenetics 2, 87–91 (1975)
Lantz, L.A., Callan, H.G.: Phenotypes and spermatogenesis of interspecific hybrids between Triturus cristatus and T. marmoratus. J. Genet. 52, 165–185 (1954)
Macgregor, H.C., Uzzell, T.M. Jr.: Gynogenesis in Salamanders related to Ambystoma jeffersonianum. Science 143, 1043–1045 (1964)
Malik, C.P., Grover, I.S.: Cytogenetic studies in Papaver. II. Hybrids among species with 7 as the haploid chromosome number. Caryologia (Firenze) 26, 13–25 (1973)
Müller, W.P.: The lampbrush chromosomes of Xenopus laevis (Daudin). Chromosoma (Berl.) 47, 283–296 (1974)
Parker, H.W.: The taxonomic position and geographical distribution of the genus Xenopus. In: Normal table of Xenopus laevis (Daudin), IV: 9–12. (P.D. Nieuwkoop and J. Faber, eds.). Amsterdam: North Holland Publ. Comp. 1956
Riley, R., Law, C.N.: Genetic variation in chromosome pairing. Advanc. Genet. 13, 57–114 (1965)
Sjödin, J.: Induced asynaptic mutants in Vicia faba L. Hereditas (Lund) 66, 215–232 (1970)
Snedecor, G.W., Cochran, W.G.: Statistical methods. Ames, Iowa: Iowa State University Press 1967
Spurway, H.: Genetics of specific and subspecific differences in european newts. Symp. Soc. exp. Biol. 7, 200–237 (1953)
Twitty, V.C.: Fertility of Taricha species-hybrids and viability of their offspring. Proc. nat. Acad. Sci. (Wash.) 51, 156–161 (1964)
Tymowska, J., Fischberg, M.: Chromosome complements of the genus Xenopus. Chromosoma (Berl.) 44, 335–342 (1973)
Vallée, L.: Recherches sur Triturus blasii de l'Isle, hybride naturel de Triturus cristatus Laur. x Triturus marmoratus Latr. Mem. Soc. Zool. France 31, 1–96 (1959)
White, M.J.D.: Animal cytology and evolution. London: Cambridge University Press 1973
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Müller, W.P. Diplotene chromosomes of Xenopus hybrid oocytes. Chromosoma 59, 273–282 (1977). https://doi.org/10.1007/BF00327969
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DOI: https://doi.org/10.1007/BF00327969