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

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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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Autores principales: Remis, M.I., Clemente, M., Pensel, S., Vilardi, J.C.
Formato: Artículo publishedVersion
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:http://hdl.handle.net/20.500.12110/paper_00180661_v129_n3_p207_Remis
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00180661_v129_n3_p207_Remis_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00180661_v129_n3_p207_Remis_oai
record_format dspace
spelling I28-R145-paper_00180661_v129_n3_p207_Remis_oai2024-08-16 Remis, M.I. Clemente, M. Pensel, S. Vilardi, J.C. 1998 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. application/pdf http://hdl.handle.net/20.500.12110/paper_00180661_v129_n3_p207_Remis info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Hereditas 1998;129(3):207-213 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 Non random distribution patterns of supernumerary segments and B chromosomes in Dichroplus elongatus (Orthoptera) info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00180661_v129_n3_p207_Remis_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (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, M.I.
Clemente, M.
Pensel, S.
Vilardi, J.C.
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.
format Artículo
Artículo
publishedVersion
author Remis, M.I.
Clemente, M.
Pensel, S.
Vilardi, J.C.
author_facet Remis, M.I.
Clemente, M.
Pensel, S.
Vilardi, J.C.
author_sort Remis, M.I.
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 http://hdl.handle.net/20.500.12110/paper_00180661_v129_n3_p207_Remis
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00180661_v129_n3_p207_Remis_oai
work_keys_str_mv AT remismi nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
AT clementem nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
AT pensels nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
AT vilardijc nonrandomdistributionpatternsofsupernumerarysegmentsandbchromosomesindichropluselongatusorthoptera
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