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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/37090

Title: Geographical Barriers Impeded the Spread of a Parasitic Chromosome
Authors: Manrique-Poyato, María Inmaculada
López-León, María Dolores
Cabrero, Josefa
Gómez, Ricardo
Perfectti Álvarez, Francisco
Martínez Camacho, Juan Pedro
Issue Date: 2015
Abstract: Parasitic supernumerary (B) chromosomes show high capability to spread across populations. But the existence of abrupt discontinuities in their distribution demands an explanation. The grasshopper Eyprepocnemis plorans plorans harbour supernumerary chromosomes in all natural populations hitherto analyzed from the Circum-Mediterranean region, with the single exception of the headwaters of the Iberian Segura River and several of its tributaries. To ascertain the causes of this distribution pattern, we analyze here the genetic structure of five natural populations collected in this zone (two +B and three -B), by means of ISSR markers. We found significant population structure, with two kinds of populations coinciding with +B and -B ones, separated by strong barriers to gene flow. This gives strong support to the hypothesis that the non-B populations precede B origin, and that B-carrying individuals from coastal zones have been able to colonize upstream areas, until geographical barriers (usually narrow canyons and arid areas surrounding them) impeded their advance.
Sponsorship: The authors received no specific funding for this work. Project applications have been rejected in 2012, 2013 and 2014.
Publisher: Public Library of Science (Plos)
Keywords: Chromosomes
Gene flow
Population genetics
Polymerase chain reaction
DNA sequence analysis
Geographic distribution
URI: http://hdl.handle.net/10481/37090
ISSN: 1932-6203
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Manrique-Poyato, M.I.; et al. Geographical Barriers Impeded the Spread of a Parasitic Chromosome. Plos One, 10(6): e0131277 (2015). [http://hdl.handle.net/10481/37090]
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