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Does hybridization drive the transition to asexuality in diploid Boechera?

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dc.contributor.author Beck, James B.
dc.contributor.author Alexander, Patrick J.
dc.contributor.author Allphin, Loreen
dc.contributor.author Al-Shehbaz, Ihsan A.
dc.contributor.author Rushworth, Catherine
dc.contributor.author Bailey, C. Donovan
dc.contributor.author Windham, Michael D.
dc.date.accessioned 2012-05-04T17:41:02Z
dc.date.available 2012-05-04T17:41:02Z
dc.date.issued 2012-04
dc.identifier.citation Beck, J. B., P. J. Alexander, L. Allphin, I. A. Al-Shehbaz, C. Rushworth, C. D. Bailey, and M. D. Windham. 2012. "DOES HYBRIDIZATION DRIVE THE TRANSITION TO ASEXUALITY IN DIPLOID-BOECHERA?" EVOLUTION -LAWRENCE KANSAS-. 66 (4): 985-995. en_US
dc.identifier.issn 0014-3820
dc.identifier.other WOS:000302546700004
dc.identifier.uri http://hdl.handle.net/10057/5090
dc.identifier.uri http://dx.doi.org/10.1111/j.1558-5646.2011.01507.x
dc.description Click on the DOI link below to access the article (may not be free). en_US
dc.description.abstract Gametophytic apomixis is a common form of asexual reproduction in plants. Virtually all gametophytic apomicts are polyploids, and some view polyploidy as a prerequisite for the transition to apomixis. However, any causal link between apomixis and polyploidy is complicated by the fact that most apomictic polyploids are allopolyploids, leading some to speculate that hybridization, rather than polyploidy, enables apomixis. Diploid apomixis presents a rare opportunity to isolate the role of hybridization, and a number of diploid apomicts have been documented in the genus Boechera (Brassicaceae). Here, we present the results of a microsatellite study of 1393 morphologically and geographically diverse diploid individuals, evaluating the hypothesis that diploid Boechera apomicts are hybrids. This genus-wide dataset was made possible by the applicability of a core set of microsatellite loci in 69 of the 70 diploid Boechera species and by our ability to successfully genotype herbariu! m specimens of widely varying ages. With few exceptions, diploid apomicts exhibited markedly high levels of heterozygosity resulting from the combination of disparate genomes. This strongly suggests that most apomictic diploid Boechera lineages are of hybrid origin, and that the genomic consequences of hybridization allow for the transition to gametophytic apomixis in this genus. en_US
dc.language.iso en_US en_US
dc.publisher WILEY-BLACKWELL en_US
dc.relation.ispartofseries EVOLUTION -LAWRENCE KANSAS-;2012, v.66, no.4
dc.subject Apomixis en_US
dc.subject Genomic-collision en_US
dc.subject Heterozygosity en_US
dc.subject Microsatellites en_US
dc.subject Polyploidy en_US
dc.subject.classification ENVIRONMENTAL SCIENCES & ECOLOGY
dc.subject.classification EVOLUTIONARY BIOLOGY
dc.subject.classification GENETICS & HEREDITY
dc.title Does hybridization drive the transition to asexuality in diploid Boechera? en_US
dc.type Article en_US
dc.description.version Peer reviewed
dc.rights.holder © 2011 The Author(s). Evolution© 2011 The Society for the Study of Evolution.

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