Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus

Dichroplus elongatus, a widespread South American phytophagous grasshopper, exhibits polymorphisms for supernumerary chromosomes and segments (SS) in natural populations in Argentina. In this paper we review the available information on B chromosome polymorphism in D. elongatus related to geographic...

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Autores principales: Remis, Maria Isabel, Vilardi, Juan Cesar
Publicado: 2004
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Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14248581_v106_n2-4_p359_Remis
http://hdl.handle.net/20.500.12110/paper_14248581_v106_n2-4_p359_Remis
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spelling paper:paper_14248581_v106_n2-4_p359_Remis2023-06-08T16:14:00Z Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus Remis, Maria Isabel Vilardi, Juan Cesar mitochondrial DNA Argentina autosome chromosome segregation chromosome variant correlation analysis Dichroplus elongatus fertility genetic heterogeneity genetic polymorphism geographic distribution grasshopper mitosis nonhuman prevalence priority journal review scoring system spermatogenesis supernumerary chromosome Animals Chromosomal Instability Chromosomes Grasshoppers Mitosis Polymorphism, Genetic Dichroplus Dichroplus elongatus Dichroplus elongatus, a widespread South American phytophagous grasshopper, exhibits polymorphisms for supernumerary chromosomes and segments (SS) in natural populations in Argentina. In this paper we review the available information on B chromosome polymorphism in D. elongatus related to geographic distribution, patterns of chromosome variation and influence on sperm formation. In D. elongatus the different forms of supernumerary variants are not independent. The proportion of B-carrying individuals (B prevalence) is negatively correlated with SS10 and positively with SS6 frequencies. The analysis of population structure considering the different supernumerary variants would suggest that the patterns of chromosome variation can not be explained only by random factors. Geographic distribution was analyzed scoring the prevalence of B chromosomes in 13 natural populations collected in three different biogeographical provinces from Northwest (Las Yungas province) and East (Espinal and Pampeana provinces) of Argentina. The detected heterogeneity may be explained by significant differentiation between Northwest and East regions and among populations within Las Yungas and Pampeana provinces. Correlation analysis suggested that B chromosome prevalence is associated with maximum temperature and with latitude. Additional information about the nature of the patterns of B chromosome variation was obtained comparing them with those obtained at the mitochondrial DNA level. The hierarchical analysis of molecular differentiation revealed discrepancy with respect to chromosome differentiation and also suggested that the pattern of B chromosomes may not be explained by historical factors. We also discussed the probable influence on fertility of carriers considering the production of abnormal sperm formation (macro and microspermatids) in relation to the number of Bs per follicle. Copyright © 2004 S. Karger AG, Basel. Fil:Remis, M.I. 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. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14248581_v106_n2-4_p359_Remis http://hdl.handle.net/20.500.12110/paper_14248581_v106_n2-4_p359_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 mitochondrial DNA
Argentina
autosome
chromosome segregation
chromosome variant
correlation analysis
Dichroplus elongatus
fertility
genetic heterogeneity
genetic polymorphism
geographic distribution
grasshopper
mitosis
nonhuman
prevalence
priority journal
review
scoring system
spermatogenesis
supernumerary chromosome
Animals
Chromosomal Instability
Chromosomes
Grasshoppers
Mitosis
Polymorphism, Genetic
Dichroplus
Dichroplus elongatus
spellingShingle mitochondrial DNA
Argentina
autosome
chromosome segregation
chromosome variant
correlation analysis
Dichroplus elongatus
fertility
genetic heterogeneity
genetic polymorphism
geographic distribution
grasshopper
mitosis
nonhuman
prevalence
priority journal
review
scoring system
spermatogenesis
supernumerary chromosome
Animals
Chromosomal Instability
Chromosomes
Grasshoppers
Mitosis
Polymorphism, Genetic
Dichroplus
Dichroplus elongatus
Remis, Maria Isabel
Vilardi, Juan Cesar
Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus
topic_facet mitochondrial DNA
Argentina
autosome
chromosome segregation
chromosome variant
correlation analysis
Dichroplus elongatus
fertility
genetic heterogeneity
genetic polymorphism
geographic distribution
grasshopper
mitosis
nonhuman
prevalence
priority journal
review
scoring system
spermatogenesis
supernumerary chromosome
Animals
Chromosomal Instability
Chromosomes
Grasshoppers
Mitosis
Polymorphism, Genetic
Dichroplus
Dichroplus elongatus
description Dichroplus elongatus, a widespread South American phytophagous grasshopper, exhibits polymorphisms for supernumerary chromosomes and segments (SS) in natural populations in Argentina. In this paper we review the available information on B chromosome polymorphism in D. elongatus related to geographic distribution, patterns of chromosome variation and influence on sperm formation. In D. elongatus the different forms of supernumerary variants are not independent. The proportion of B-carrying individuals (B prevalence) is negatively correlated with SS10 and positively with SS6 frequencies. The analysis of population structure considering the different supernumerary variants would suggest that the patterns of chromosome variation can not be explained only by random factors. Geographic distribution was analyzed scoring the prevalence of B chromosomes in 13 natural populations collected in three different biogeographical provinces from Northwest (Las Yungas province) and East (Espinal and Pampeana provinces) of Argentina. The detected heterogeneity may be explained by significant differentiation between Northwest and East regions and among populations within Las Yungas and Pampeana provinces. Correlation analysis suggested that B chromosome prevalence is associated with maximum temperature and with latitude. Additional information about the nature of the patterns of B chromosome variation was obtained comparing them with those obtained at the mitochondrial DNA level. The hierarchical analysis of molecular differentiation revealed discrepancy with respect to chromosome differentiation and also suggested that the pattern of B chromosomes may not be explained by historical factors. We also discussed the probable influence on fertility of carriers considering the production of abnormal sperm formation (macro and microspermatids) in relation to the number of Bs per follicle. Copyright © 2004 S. Karger AG, Basel.
author Remis, Maria Isabel
Vilardi, Juan Cesar
author_facet Remis, Maria Isabel
Vilardi, Juan Cesar
author_sort Remis, Maria Isabel
title Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus
title_short Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus
title_full Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus
title_fullStr Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus
title_full_unstemmed Mitotically unstable B chromosome polymorphism in the grasshopper Dichroplus elongatus
title_sort mitotically unstable b chromosome polymorphism in the grasshopper dichroplus elongatus
publishDate 2004
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14248581_v106_n2-4_p359_Remis
http://hdl.handle.net/20.500.12110/paper_14248581_v106_n2-4_p359_Remis
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