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Abstract:

Leptysma argentina (Acrididae: Orthoptera) is polymorphic for a centric fusion between pairs 3 and 6 of its basic chromosomal complement. With the aim of carrying out an analysis of selection components in this species, male mating success, in relation to karyotype and three morphometric traits, was assessed by using experimental contests with four males and one female per mating cage. Karyotype was assessed in terms of fused chromosome 3/6 dosage and coded as '0', '1' and '2' for unfused homozygotes, heterozygotes and fusion homozygotes, respectively. The individual ANOVA showed significant differences between 'successful' and 'unsuccessful' males in all four measured characters. Fusion carriers showed a higher relative fitness. Since the phenotypic correlations among traits were significant, the selective effects were assessed by means of a multivariate analysis, which demonstrated that selection acted significantly on femur length only, selection on karyotype being indirect. Given that the fusion frequency has been constant since 1985, the presence of selective trade-offs cannot be ruled out.

Registro:

Documento: Artículo
Título:Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera)
Autor:Colombo, P.C.; Pensel, S.M.; Remis, M.I.
Filiación:Departamento de Ciencias Biologicas, Facul. de Cien. Exactas y Naturales, Universidad de Buenos Aires, 1428 Ciudad Universitaria, Buenos Aires, Argentina
Palabras clave:Centric fusion; Leptysma argentina; Morphometric variables; Orthoptera; Sexual selection; morphology; polymorphism; reproductive success; sexual selection; Acrididae; Leptysma argentina; Orthoptera; animal; article; body constitution; chromosome; cross breeding; female; femur; genetic polymorphism; genetics; genotype; histology; karyotyping; male; metaphase; Orthoptera; sexual behavior; sexual development; thorax; Animal; Body Constitution; Chromosomes; Crosses, Genetic; Female; Femur; Genotype; Karyotyping; Male; Metaphase; Orthoptera; Polymorphism (Genetics); Sex Behavior, Animal; Sex Characteristics; Support, Non-U.S. Gov't; Thorax
Año:2001
Volumen:87
Número:4
Página de inicio:480
Página de fin:484
DOI: http://dx.doi.org/10.1046/j.1365-2540.2001.00932.x
Título revista:Heredity
Título revista abreviado:Heredity
ISSN:0018067X
CODEN:HDTYA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v87_n4_p480_Colombo

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Citas:

---------- APA ----------
Colombo, P.C., Pensel, S.M. & Remis, M.I. (2001) . Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera). Heredity, 87(4), 480-484.
http://dx.doi.org/10.1046/j.1365-2540.2001.00932.x
---------- CHICAGO ----------
Colombo, P.C., Pensel, S.M., Remis, M.I. "Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera)" . Heredity 87, no. 4 (2001) : 480-484.
http://dx.doi.org/10.1046/j.1365-2540.2001.00932.x
---------- MLA ----------
Colombo, P.C., Pensel, S.M., Remis, M.I. "Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera)" . Heredity, vol. 87, no. 4, 2001, pp. 480-484.
http://dx.doi.org/10.1046/j.1365-2540.2001.00932.x
---------- VANCOUVER ----------
Colombo, P.C., Pensel, S.M., Remis, M.I. Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera). Heredity. 2001;87(4):480-484.
http://dx.doi.org/10.1046/j.1365-2540.2001.00932.x