Macrogeographic patterns in B-chromosome and inversion polymorphisms of the grasshopper Trimerotropis pallidipennis

South American populations of Trimerotropis pallidipennis are polymorphic for pericentric inversions and B-chromosomes. Previous studies revealed the existence of altitudinal, latitudinal and longitudinal clines for 9 chromosomal sequences, whose repetition in independent groups of populations and o...

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Autor principal: Confalonieri, V.A
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 1995
Acceso en línea:Registro en Scopus
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Registro en la Biblioteca Digital
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100 1 |a Confalonieri, V.A. 
245 1 0 |a Macrogeographic patterns in B-chromosome and inversion polymorphisms of the grasshopper Trimerotropis pallidipennis 
260 |c 1995 
270 1 0 |m Confalonieri, V.A.; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias Biológicas, Intendente Güiraldez y Costanera Norte, 1428 Buenos Aires, Argentina 
506 |2 openaire  |e Política editorial 
520 3 |a South American populations of Trimerotropis pallidipennis are polymorphic for pericentric inversions and B-chromosomes. Previous studies revealed the existence of altitudinal, latitudinal and longitudinal clines for 9 chromosomal sequences, whose repetition in independent groups of populations and over a wide area suggested the action of natural selection. The frequencies of B-chromosomes were analyzed in 25 samples from Argentina. In some of them, the B-chromosome interfers with the genetic control of chiasma formation, which is partly conditioned by inversions. Multiple regression analyses revealed that the frequency of B-carriers in each population is significantly associated with latitude (negatively) and longitude (positively), and that the frequency of inversions significantly decreases at higher altitudes and latitudes. The pattern of distribution observed for B-carriers is most probably related to the suitability of habitats. These results agree with the parasitic model, which claims that higher incidence of the B-chromosome in natural populations is associated with more favorable environments. © 1995 Elsevier/INRA.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires 
536 |a Detalles de la financiación: I wish to express my sincere thanks to JH Hunziker for critical Financial support from the Consejo National de Investigaciones Universidad de Buenos Aires, through grants to JH Hunziker reading of the manuscript. Cientificas y TBcnicas and and JC Vilardi. 
593 |a Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias Biológicas, Intendente Güiraldez y Costanera Norte, 1428 Buenos Aires, Argentina 
690 1 0 |a B-CHROMOSOME 
690 1 0 |a INVERSION 
690 1 0 |a NATURAL SELECTION 
690 1 0 |a ORTHOPTERA 
690 1 0 |a POLYMORPHISM 
690 1 0 |a TRIMEROTROPIS PALLIDIPENNIS 
773 0 |d 1995  |g v. 27  |h pp. 305-311  |k n. 4  |p Genet. Sel. Evol.  |x 0999193X  |w (AR-BaUEN)CENRE-8445  |t Genetics, Selection, Evolution 
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856 4 0 |u https://doi.org/10.1016/0999-193X(96)80482-4  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_0999193X_v27_n4_p305_Confalonieri  |y Handle 
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