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Abstract:

Trimerotropis pallidipennis is a New World grasshopper whose South-American populations are polymorphic for six pericentric inversions. Previous work has demonstrated that the frequences of these inversions correlate with climatic variables, and hence a possible adaptive pattern was put forward. In the present work we analysed a sample of a natural population of T. pallidipennis to ascertain whether the chromosomal inversions have effects on exophenotypes. Two hundred and sixty-eight males coming from a natural population at Uspallata, Mendoza Province, Argentina were analysed, and it was observed that most inversions had significant effects on phenotypes. Furthermore, some body size-related characteristics (such as tegmina length) were correlated with the number of inversions. Individuals from populations at higher altitude or latitude (i.e., at lower minimum temperatures), along with higher frequencies of standard sequences, were significantly smaller, and this coherence between interpopulational with intrapopulational results may indicate that the diminished body size of the standard sequence-carrying individuals may be caused by an effect of the inversions, or genes within the inversions, on body size. We finally put forward the hypothesis that reduced body size in a context of reduced minimum temperature may be a response to shortened development season, and so smaller individuals may be advantageous.

Registro:

Documento: Artículo
Título:Chromosome inversion polymorphisms influence morphological traits in Trimerotropis pallidipennis (Orthoptera)
Autor:Colombo, P.C.
Filiación:Depto. Cs. Biológicas, FCEN, 1428 Ciudad Unversitaria, Buenos Aires, Argentina
Palabras clave:Morphometric variables; Orthoptera; Pericentric inversions; Trimerotropis pallidipennis; analysis of variance; animal; article; chromosome inversion; genetic polymorphism; genetics; histology; male; multivariate analysis; Orthoptera; phenotype; Analysis of Variance; Animals; Inversion, Chromosome; Male; Multivariate Analysis; Orthoptera; Phenotype; Polymorphism, Genetic; Animalia; Insecta; Orthoptera; Trimerotropis
Año:2002
Volumen:114
Número:3
Página de inicio:247
Página de fin:252
DOI: http://dx.doi.org/10.1023/A:1016295005890
Título revista:Genetica
Título revista abreviado:Genetica
ISSN:00166707
CODEN:GENEA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v114_n3_p247_Colombo

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Citas:

---------- APA ----------
(2002) . Chromosome inversion polymorphisms influence morphological traits in Trimerotropis pallidipennis (Orthoptera). Genetica, 114(3), 247-252.
http://dx.doi.org/10.1023/A:1016295005890
---------- CHICAGO ----------
Colombo, P.C. "Chromosome inversion polymorphisms influence morphological traits in Trimerotropis pallidipennis (Orthoptera)" . Genetica 114, no. 3 (2002) : 247-252.
http://dx.doi.org/10.1023/A:1016295005890
---------- MLA ----------
Colombo, P.C. "Chromosome inversion polymorphisms influence morphological traits in Trimerotropis pallidipennis (Orthoptera)" . Genetica, vol. 114, no. 3, 2002, pp. 247-252.
http://dx.doi.org/10.1023/A:1016295005890
---------- VANCOUVER ----------
Colombo, P.C. Chromosome inversion polymorphisms influence morphological traits in Trimerotropis pallidipennis (Orthoptera). Genetica. 2002;114(3):247-252.
http://dx.doi.org/10.1023/A:1016295005890