Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)

Dichroplus elongatus is a grasshopper, which exhibits parallel polymorphisms for B chromosomes and supernumerary segments in chromosomes S10 (SS10), S9 (SS9) and M6 (SS6) in natural populations of Argentina. The patterns of simultaneous variation of different forms of supernumerary heterochromatin f...

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Detalles Bibliográficos
Autores principales: Remis, Maria Isabel, Clemente, Marina, Pensel, Sara M., Vilardi, Juan Cesar
Publicado: 1998
Materias:
Argentina
article
autosome
chromosome mutation
gene frequency
genetic drift
genetic polymorphism
geographic distribution
grasshopper
male
multiple regression
nonhuman
principal component analysis
supernumerary chromosome
Dichroplus elongatus
Orthoptera
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v129_n3_p207_Remis
http://hdl.handle.net/20.500.12110/paper_00180661_v129_n3_p207_Remis
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00180661_v129_n3_p207_Remis
record_format dspace
spelling paper:paper_00180661_v129_n3_p207_Remis2023-06-08T14:39:14Z Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera) Remis, Maria Isabel Clemente, Marina Pensel, Sara M. Vilardi, Juan Cesar Argentina article autosome chromosome mutation gene frequency genetic drift genetic polymorphism geographic distribution grasshopper male multiple regression nonhuman principal component analysis supernumerary chromosome Dichroplus elongatus Orthoptera Dichroplus elongatus is a grasshopper, which exhibits parallel polymorphisms for B chromosomes and supernumerary segments in chromosomes S10 (SS10), S9 (SS9) and M6 (SS6) in natural populations of Argentina. The patterns of simultaneous variation of different forms of supernumerary heterochromatin from 7 populations of two biogeographic provinces located at Northwest and East regions of this country were analysed. Spatial chromosome differentiation for all heterochromatic variants was observed. Different degree of differentiation among populations for supernumerary segments, evaluated through F(ST), was observed. This suggests that genetic drift and migration may not be the only factors involved in the maintenance of the detected chromosome patterns. The differentiation for SS9 and SS10 may be explained mainly by heterogeneity within the Northwest Region. On the contrary, the differences for SS6 and B chromosomes explained through isolation by distance. However, the absence or the low frequency of both chromosome mutations in some populations may not be explained by historical factors. A principal component analysis showed that the patterns of chromosome variation do not agree with the geographical distribution of the populations. The relationship between frequencies of each supernumerary segment and B chromosome depends on the segment. An analysis of partial correlation showed that the frequencies of B chromosomes were positively correlated with the frequency of SS6 and negatively with the frequency of the SS10. In agreement with this, a multiple regression analysis of B chromosome frequency on supernumerary segment frequencies depends on the incidence of SS6 and SS10. The covariation of the heterochromatic forms may act as another factor that establish limits to stochastic factors, may also affect the probable negative selection on B, and could be involved in the non random pattern detected in D. elongatus. Fil:Remis, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Clemente, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pensel, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilardi, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v129_n3_p207_Remis http://hdl.handle.net/20.500.12110/paper_00180661_v129_n3_p207_Remis
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
article
autosome
chromosome mutation
gene frequency
genetic drift
genetic polymorphism
geographic distribution
grasshopper
male
multiple regression
nonhuman
principal component analysis
supernumerary chromosome
Dichroplus elongatus
Orthoptera
spellingShingle Argentina
article
autosome
chromosome mutation
gene frequency
genetic drift
genetic polymorphism
geographic distribution
grasshopper
male
multiple regression
nonhuman
principal component analysis
supernumerary chromosome
Dichroplus elongatus
Orthoptera
Remis, Maria Isabel
Clemente, Marina
Pensel, Sara M.
Vilardi, Juan Cesar
Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)
topic_facet Argentina
article
autosome
chromosome mutation
gene frequency
genetic drift
genetic polymorphism
geographic distribution
grasshopper
male
multiple regression
nonhuman
principal component analysis
supernumerary chromosome
Dichroplus elongatus
Orthoptera
description Dichroplus elongatus is a grasshopper, which exhibits parallel polymorphisms for B chromosomes and supernumerary segments in chromosomes S10 (SS10), S9 (SS9) and M6 (SS6) in natural populations of Argentina. The patterns of simultaneous variation of different forms of supernumerary heterochromatin from 7 populations of two biogeographic provinces located at Northwest and East regions of this country were analysed. Spatial chromosome differentiation for all heterochromatic variants was observed. Different degree of differentiation among populations for supernumerary segments, evaluated through F(ST), was observed. This suggests that genetic drift and migration may not be the only factors involved in the maintenance of the detected chromosome patterns. The differentiation for SS9 and SS10 may be explained mainly by heterogeneity within the Northwest Region. On the contrary, the differences for SS6 and B chromosomes explained through isolation by distance. However, the absence or the low frequency of both chromosome mutations in some populations may not be explained by historical factors. A principal component analysis showed that the patterns of chromosome variation do not agree with the geographical distribution of the populations. The relationship between frequencies of each supernumerary segment and B chromosome depends on the segment. An analysis of partial correlation showed that the frequencies of B chromosomes were positively correlated with the frequency of SS6 and negatively with the frequency of the SS10. In agreement with this, a multiple regression analysis of B chromosome frequency on supernumerary segment frequencies depends on the incidence of SS6 and SS10. The covariation of the heterochromatic forms may act as another factor that establish limits to stochastic factors, may also affect the probable negative selection on B, and could be involved in the non random pattern detected in D. elongatus.
author Remis, Maria Isabel
Clemente, Marina
Pensel, Sara M.
Vilardi, Juan Cesar
author_facet Remis, Maria Isabel
Clemente, Marina
Pensel, Sara M.
Vilardi, Juan Cesar
author_sort Remis, Maria Isabel
title Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)
title_short Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)
title_full Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)
title_fullStr Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)
title_full_unstemmed Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera)
title_sort non random distribution patterns of supernumerary segments and b chromosomes in dichroplus elongatus (orthoptera)
publishDate 1998
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v129_n3_p207_Remis
http://hdl.handle.net/20.500.12110/paper_00180661_v129_n3_p207_Remis
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AT clementemarina nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
AT penselsaram nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
AT vilardijuancesar nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
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