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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2004
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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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AT remismariaisabel mitoticallyunstablebchromosomepolymorphisminthegrasshopperdichropluselongatus AT vilardijuancesar mitoticallyunstablebchromosomepolymorphisminthegrasshopperdichropluselongatus |
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