Document Detail


Interaction among different heterocromatic variants in the grasshopper Dichroplus elongatus.
MedLine Citation:
PMID:  15660978     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
María Isabel Remis; Sara Pensel; Natalia Rosetti
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Hereditas     Volume:  141     ISSN:  0018-0661     ISO Abbreviation:  Hereditas     Publication Date:  2004  
Date Detail:
Created Date:  2005-01-21     Completed Date:  2005-03-04     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0374654     Medline TA:  Hereditas     Country:  Sweden    
Other Details:
Languages:  eng     Pagination:  180-5     Citation Subset:  IM    
Affiliation:
Depto. Ecología, Genética y Evolución, Fac. Cs. Exactas y Naturales, Univ. Buenos Aires, 142 Buenos Aires, Argentina. mariar@bg.fcen.uba.ar
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MeSH Terms
Descriptor/Qualifier:
Animals
Chromosomes*
Genetic Variation*
Genetics, Population
Grasshoppers / genetics*
Heterochromatin*
Male
Polymorphism, Genetic
Regression Analysis
Chemical
Reg. No./Substance:
0/Heterochromatin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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