Polyploidy, hybridization and evolution in Pratia (Campanulaceae)

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dc.contributor.author Murray, B.G. en
dc.contributor.author Datson, P.M. en
dc.contributor.author Lai, E.L.Y. en
dc.contributor.author Sheath, K.M. en
dc.contributor.author Cameron, E.K. en
dc.date.accessioned 2009-08-24T06:51:44Z en
dc.date.available 2009-08-24T06:51:44Z en
dc.date.issued 2004 en
dc.identifier.citation New Zealand Journal of Botany 42 (5), 905-920. 2004 en
dc.identifier.issn 0028825X en
dc.identifier.other eid=2-s2.0-13444250145 en
dc.identifier.uri http://hdl.handle.net/2292/4794 en
dc.description An open access copy of this article is available from the publishers website. en
dc.description.abstract Evolution in the genus Pratia (Campanulaceae) has been studied using a variety of techniques. The distribution of chromosome races in P. angulata has been plotted and results suggest that although they generally occupy different geographic areas there are large areas of overlap. No consistent morphological differences were found between these chromosome races. The existence of hybrids between P. angulata and P. perpusilla with 11x and 13x chromosome numbers has been established using genomic in situ hybridization (GISH), and random amplified polymorphic DNA (RAPD) analysis suggests several independent origins for these hybrids. Artificial hybridization studies showed a high degree of compatibility in almost all the combinations that were attempted. DNA sequences derived from both the nuclear genome (internal transcribed spacer of the rDNA locus, ITS) and chloroplast genomes (trnL intron and trnL-trnF spacer) were used to construct phylogenies. Colensoa physaloides has been shown to be distinct from the New Zealand species of Pratia and was used as an outgroup to root the phylogenetic trees. A significant finding is that P. macrodon is sister to the other New Zealand species. DNA sequence data also confirm the hybrid origin of the 11x and 13x plants and show that P. perpusilla is the maternal parent of the 11x plants and P. angulata is the maternal parent of the 13x ones. The origin of the putative hybrid plants with the 12x chromosome number remains to be elucidated. en
dc.publisher Royal Society Of New Zealand en
dc.relation.ispartofseries New Zealand Journal of Botany en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0028-825X/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.source.uri http://www.royalsociety.org.nz/publications/journals/nzjb/2004/051 en
dc.title Polyploidy, hybridization and evolution in Pratia (Campanulaceae) en
dc.type Journal Article en
dc.subject.marsden Fields of Research::270000 Biological Sciences::270400 Botany en
pubs.issue 5 en
pubs.begin-page 905 en
pubs.volume 42 en
dc.rights.holder Copyright: Royal Society of New Zealand en
pubs.end-page 920 en

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