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Spatio-temporal dynamics of a neutralized B chromosome in the grasshopper Eyprepocnemis plorans.
Cytogenet Genome Res. 2004; 106(2-4):376-85.CG

Abstract

Spatial and temporal patterns of frequency variation for a neutralized B chromosome in the grasshopper Eyprepocnemis plorans were analyzed along six transects in the east of Spain to explore possible factors affecting the population dynamics of this polymorphism. Three parameters were employed to quantify B frequency: prevalence, load and mean frequency. Of them, load seemed to be the less sensitive parameter, probably due to its small range of variation. Prevalence, however, shows ample variation, but the mean frequency of B chromosomes per individual is the best parameter to characterize B frequency. Only river transects revealed significant differences among populations, and the use of two geographic explicit approaches (Mantel test and distograms) revealed significant isolation by distance (IBD), especially at the Segura River mouth, presumably due to low gene flow and drift. No temporal trend was found in the Segura River transects, which is consistent with the slow changes in B frequency expected during the random walk for neutralized B chromosomes. But these transects showed a clear spatial pattern, with B1 showing lower frequency in the upper course of this river. The present results provide the first empirical evidence of IBD in the evolution of a neutralized B chromosome, and support the notion that B dynamics at this evolutionary stage is best explained by a metapopulation approach.

Authors+Show Affiliations

Departamento de Genética, Universidad de Granada, Granada, Spain. fperfect@ugr.esNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15292619

Citation

Perfectti, F, et al. "Spatio-temporal Dynamics of a Neutralized B Chromosome in the Grasshopper Eyprepocnemis Plorans." Cytogenetic and Genome Research, vol. 106, no. 2-4, 2004, pp. 376-85.
Perfectti F, Pita M, de la Vega CG, et al. Spatio-temporal dynamics of a neutralized B chromosome in the grasshopper Eyprepocnemis plorans. Cytogenet Genome Res. 2004;106(2-4):376-85.
Perfectti, F., Pita, M., de la Vega, C. G., Gosálvez, J., & Camacho, J. P. (2004). Spatio-temporal dynamics of a neutralized B chromosome in the grasshopper Eyprepocnemis plorans. Cytogenetic and Genome Research, 106(2-4), 376-85.
Perfectti F, et al. Spatio-temporal Dynamics of a Neutralized B Chromosome in the Grasshopper Eyprepocnemis Plorans. Cytogenet Genome Res. 2004;106(2-4):376-85. PubMed PMID: 15292619.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Spatio-temporal dynamics of a neutralized B chromosome in the grasshopper Eyprepocnemis plorans. AU - Perfectti,F, AU - Pita,M, AU - de la Vega,C G, AU - Gosálvez,J, AU - Camacho,J P M, PY - 2004/02/17/received PY - 2004/03/19/accepted PY - 2004/8/5/pubmed PY - 2005/2/5/medline PY - 2004/8/5/entrez SP - 376 EP - 85 JF - Cytogenetic and genome research JO - Cytogenet. Genome Res. VL - 106 IS - 2-4 N2 - Spatial and temporal patterns of frequency variation for a neutralized B chromosome in the grasshopper Eyprepocnemis plorans were analyzed along six transects in the east of Spain to explore possible factors affecting the population dynamics of this polymorphism. Three parameters were employed to quantify B frequency: prevalence, load and mean frequency. Of them, load seemed to be the less sensitive parameter, probably due to its small range of variation. Prevalence, however, shows ample variation, but the mean frequency of B chromosomes per individual is the best parameter to characterize B frequency. Only river transects revealed significant differences among populations, and the use of two geographic explicit approaches (Mantel test and distograms) revealed significant isolation by distance (IBD), especially at the Segura River mouth, presumably due to low gene flow and drift. No temporal trend was found in the Segura River transects, which is consistent with the slow changes in B frequency expected during the random walk for neutralized B chromosomes. But these transects showed a clear spatial pattern, with B1 showing lower frequency in the upper course of this river. The present results provide the first empirical evidence of IBD in the evolution of a neutralized B chromosome, and support the notion that B dynamics at this evolutionary stage is best explained by a metapopulation approach. SN - 1424-859X UR - https://www.unboundmedicine.com/medline/citation/15292619/Spatio_temporal_dynamics_of_a_neutralized_B_chromosome_in_the_grasshopper_Eyprepocnemis_plorans_ L2 - https://www.karger.com?DOI=10.1159/000079315 DB - PRIME DP - Unbound Medicine ER -