Abstract
Three populations of the grasshopper Trimerotropis pallidipennis from southern Argentina have been studied cytologically. A very characteristic B-chromosome was found in all three. They also showed geographical variability in respect of the presence of pericentric inversions, and the inversion system was found to influence chiasma frequency. The Laguna Blanca population, which is on the hypothetical pathway the species is believed to have followed during its migration from northern to southern latitudes, has the same karyotype composition as the N. American form, with fixed inversions in the 3 largest autosomes and the X-chromosome. Its members have a high total chiasma frequency and a great number of interstitial chiasmata. The Sierra de la Ventana population, situated at the absolute eastern border of the species distribution is highly polymorphic with respect to the presence of inversions in the medium chromosomes. Its members have the lowest total chiasma frequency and a greatly reduced number of interstitial chiasmata. Situated geographically between the other two, the Choele-Choel population has the highest frequency of inversions and many of them are homozygous. Its members have a higher total chiasma frequency than that observed in specimens from Sierra de la Ventana, and a greatly reduced number of interstitial chiasmata, similar to that observed in individuals from the latter population.
Similar content being viewed by others
References
Carothers, E.E.: The segregation and recombination of homologous chromosomes as found in two genera of Acrididae (Orthoptera). J. Morph. 28, 445–520 (1917)
Carothers, E.E.: Genetical behaviour of heteromorphic homologous chromosomes of Circotettix (Orthoptera). J. Morph. 35, 457–483 (1921)
Carothers, E.E.: The maturation divisions in relation to the segregation of homologous chromosomes. Quart. Rev. Biol. 1, 419–435 (1926)
Carothers, E.E.: The maturation divisions and segregations of heteromorphic homologous chromosomes in Acrididae (Orthoptera). Biol. Bull. 61, 324–349 (1931)
Coleman, L.C.: The cytology of some western species of Trimerotropis (Acrididae). Genetics 33, 519–528 (1948)
Evans, W.L.: Cytology of the grasshopper genus Circotettix. Amer. Naturalist 88, 21–23 (1954)
Helwig, E.B.: Chromosomal variation correlated with geographical distribution in Circotettix verruculatus (Orthoptera). J. Morph. 47, 1–36 (1929)
Helwig, E.B.: Spermatogenesis in hybrids between Circotettix verruculatus and Trimerotropis suffusa (Orthoptera: Oedipodinae). Univ. Colorado Studies Series in Biol. 3, 4–64 (1955)
Hewitt, G.M.: The integration of supernumerary chromosomes into the orthopteran genome. Cold. Spr. Harb. Symp. quant. Biol. 38, 183–194 (1973)
Hewitt, G.M.: Meiotic drive for B-chromosomes in the primary oocytes of Myrmeleotettix maculatus (Orthoptera: Acrididae). Chromosoma (Berl.) 56, 381–391 (1976)
Jackson, R.C.: Chromosomal evolution in Haplopappus gracilis: A centric transposition race. Evolution (Lawrence, Kans.) 27, 243–256 (1973)
John, B., Hewitt, G.M.: The B-chromosome system of Myrmeleotettix maculatus (Thunb.). I. The mechanics. Chromosoma (Berl.) 16, 548–578 (1965)
John, B., Hewitt, G.M.: The B-chromosome system of Myrmeleotettix maculatus (Thunb.). II. The statics. Chromosoma (Berl.) 17, 121–138 (1965)
John, B., Lewis, K.R.: Chromosome variability and geographical distribution in insects. Science 152, 711–721 (1966)
John, B., Weissman, D.B.: Cytogenetic components of reproductive isolation in Trimerotropis thalassica and T. occidentalis. Chromosoma (Berl.) 60, 187–203 (1977)
King, R.L.: Heteromorphic homologous chromosomes in three species of Pseudotrimerotropis (Orthoptera: Acrididae). J. Morph. 38, 19–63 (1924)
La Fuente, N., Esponda, P., Solerivicens, J.: Citotaxonomia en ortópteros chilenos. Rev. Chil. Ent. 6, 91–99 (1968)
Mesa, A.: Polimorfismo cromosómico en Trimerotropis pallidipennis (Orthoptera: Oedipodinae). Rev. Per. Entom. 14, 229–233 (1971)
Mesa, A., Vaio, E.S. de: Polimorfismo cromosómico en Trimerotropis pallidipennis (Orthoptera: Oedipodinae). Sociedade Brasileira para o Progresso da Ciencia, 28a. Reuniao Anual, Brasilia, Suppl. Ciencia e Cultura Seçao 4.1.1, 282 (1976)
Rehn, J.A.G.: The South American species of Oedipodinae genus Trimerotropis (Orthoptera: Acrididae). Trans. Amer. Ent. Soc. 65, 395–414 (1940)
Robinson, P.M., Hewitt, G.M.: Annual cycles in the incidence of B-chromosomes in the grasshopper Myrmeleotettix maculatus (Orthoptera: Acrididae). Heredity 36, 399–412 (1976)
Schroeter, G.L.: Pericentric inversion polymorphism in Trimerotropis helferi (Orthoptera: Acrididae) and its effects on chiasma frequency. Ph. D. Dissertation Department of Biology-Genetics. University of California, Davis (1968)
Shultz, J., Redfield, H.: Interchromosomal effects on crossing over in Drosophila. Cold. Spr. Harb. Symp. Quant. Biol. 16, 175–197 (1951)
White, M.J.D.: Animal cytology and evolution, 1st. edit. Cambridge: University Press 1945
White, M.J.D.: A cytological survey of wild populations of Trimerotropis and Circotettix (Orthoptera, Acrididae). I. The chormosomes of twelve species. Genetics 34, 537–563 (1949)
White, M.J.D.: A cytological survey of wild populations of Trimerotropis and Circotettix (Orthoptera, Acrididae). II. Racial differentiation in T. sparsa. Genetics 35, 31–53 (1951a)
White, M.J.D.: Structural heterozygosity in natural populations of the grasshopper Trimerotropis sparsa. Evolution (Lancaster, Pa.) 5, 376–394 (1951b)
White, M.J.D.: Cytogenetics of orthopteroid insects. Adv. in Genet. 4, 267–330 (1951c)
White, M.J.D.: Animal cytology and evolution, 3rd. edit. Cambridge: University Press (1973)
White, M.J.D., Morley, F.H.W.: Effects of pericentric rearrangements on recombination in grasshopper chromosomes. Genetics 40, 604–619 (1955)
Wenrich, D.H.: Synapsis and chromosome organization in Chorthippus (Stenobothrus) curtipennis and Trimerotropis suffusa (Orthoptera). J. Morph. 29, 479–516 (1917)
Weissman, D.B.: Geographical variability in the pericentric inversion system of the grasshopper Trimerotropis pseudofasciata. Chromosoma (Berl.) 55, 325–347 (1976)
Zarchi, Y., Simchen, G., Hillel, J., Schaap, T.: Chiasmata and the breeding system in wild populations of diploid wheats. Chromosoma (Berl.) 38, 77–94 (1972)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
de Vaio, E.S., Goñi, B. & Rey, C. Chromosome polymorphism in populations of the grasshopper Trimerotropis pallidipennis from southern Argentina. Chromosoma 71, 371–386 (1979). https://doi.org/10.1007/BF00287142
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00287142