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Abstract:

Simultaneous chromosome polymorphisms for supernumerary elements allow us to analyse the relationships among different forms of heterochromatic variation in nature. We report simultaneous variation patterns for supernumerary segments in chromosomes S10 (SS10), S9 (SS9) and S6 (SS6) and B chromosomes in nine populations of the grasshopper Dichroplus elongatus from two biogeographic provinces from east Argentina. Our results show spatial chromosome differentiation for three out of four supernumerary heterochromatic variants (B chromosomes, SS6 and SS10). The incidence of B chromosomes was negatively correlated with the SS10 frequency. The distribution pattern analysis shows different degree of differentiation among populations for each supernumerary heterochromatic variant suggesting that the detected chromosome variation cannot be explained by interaction between migration and genetic drift. Moreover, the observed population chromosome differentiation was not in agreement with the hierarchical analysis of molecular of heterogeneity at mitochondrial DNA level (mtDNA). The present results point out the importance of the interaction among heterochromatic variants in the chromosome intraspecific variation in east Argentina natural populations of the grasshopper D. elongatus.

Registro:

Documento: Artículo
Título:Interaction among different heterocromatic variants in the grasshopper Dichroplus elongatus
Autor:Remis, M.I.; Pensel, S.; Rosetti, N.
Filiación:Depto. Ecologia, Genetica/Evolucion, Fac. Cs. Exactas y Naturales, Univ. Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:mitochondrial DNA; Argentina; article; chromosome analysis; chromosome variant; controlled study; correlation function; frequency analysis; gene interaction; genetic drift; genetic heterogeneity; geography; grasshopper; nonhuman; population migration; supernumerary chromosome; Animals; Chromosomes; Genetics, Population; Grasshoppers; Heterochromatin; Male; Polymorphism, Genetic; Regression Analysis; Variation (Genetics); Dichroplus; Dichroplus elongatus; Insecta
Año:2004
Volumen:141
Número:2
Página de inicio:180
Página de fin:185
DOI: http://dx.doi.org/10.1111/j.1601-5223.2004.01843.x
Título revista:Hereditas
Título revista abreviado:Hereditas
ISSN:00180661
CODEN:HEREA
CAS:Heterochromatin
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v141_n2_p180_Remis

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Citas:

---------- APA ----------
Remis, M.I., Pensel, S. & Rosetti, N. (2004) . Interaction among different heterocromatic variants in the grasshopper Dichroplus elongatus. Hereditas, 141(2), 180-185.
http://dx.doi.org/10.1111/j.1601-5223.2004.01843.x
---------- CHICAGO ----------
Remis, M.I., Pensel, S., Rosetti, N. "Interaction among different heterocromatic variants in the grasshopper Dichroplus elongatus" . Hereditas 141, no. 2 (2004) : 180-185.
http://dx.doi.org/10.1111/j.1601-5223.2004.01843.x
---------- MLA ----------
Remis, M.I., Pensel, S., Rosetti, N. "Interaction among different heterocromatic variants in the grasshopper Dichroplus elongatus" . Hereditas, vol. 141, no. 2, 2004, pp. 180-185.
http://dx.doi.org/10.1111/j.1601-5223.2004.01843.x
---------- VANCOUVER ----------
Remis, M.I., Pensel, S., Rosetti, N. Interaction among different heterocromatic variants in the grasshopper Dichroplus elongatus. Hereditas. 2004;141(2):180-185.
http://dx.doi.org/10.1111/j.1601-5223.2004.01843.x