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dc.contributor.author Rhodes, Ian
dc.contributor.author Fothergill, Mick
dc.contributor.author Helgadottir, Aslaug
dc.contributor.author Collins, Rosemary P.
dc.date.accessioned 2008-12-12T13:58:34Z
dc.date.available 2008-12-12T13:58:34Z
dc.date.issued 2008-12-12
dc.identifier.citation Rhodes , I , Fothergill , M , Helgadottir , A & Collins , R P 2008 , ' Variation amongst survivor populations of white clover collected from sites across Europe: growth attributes and physiological responses to low temperature ' Annals of Botany , pp. 283-292 . en
dc.identifier.other PURE: 101510
dc.identifier.other dspace: 2160/1573
dc.identifier.uri http://hdl.handle.net/2160/1573
dc.identifier.uri http://aob.oxfordjournals.org/cgi/content/abstract/89/3/283 en
dc.description Rosemary P. Collins, Áslaug Helgadóttir, Mick Fothergill and Ian Rhodes (2002). Variation amongst survivor populations of white clover collected from sites across Europe: growth attributes and physiological responses to low temperature. Annals of Botany, 89(3), 283-292. en
dc.description.abstract Experiments were carried out at IGER, Aberystwyth, UK to investigate traits of direct relevance to the processes of overwintering and spring growth in white clover (Trifolium repens L.). The plant material used was derived from baseline populations of the cultivar AberHerald and survivor populations generated after 2¿3 years¿ growth in Germany (Kiel), Sweden (Uppsala) and Switzerland (Zürich). The aims of the experiments were to measure the level of genetic shift that had occurred in certain traits due to selection in the survivor populations by comparing these with the baseline population. The adaptive significance of traits was assessed by determining the extent to which stabilizing selection had operated to reduce levels of intra-population variation. Significant differences were found in the responses of leaf production to two temperature treatments in the survivor populations from Germany and Sweden compared with the Swiss and baseline material. Plants of the former two populations produced much more leaf than the others at the higher temperature, but leaf production rates at the lower temperature did not differ. As this experiment used cloned genotypes in the two treatments, the result suggests that a higher degree of phenotypic plasticity for this trait had been selected for in the German and Swedish populations. These populations also showed greater rates of regrowth of leaves from terminal buds exposed to sub-zero temperatures, but there were no differences between populations in levels of freezing tolerance, or in stolon carbohydrate content. Genetic shift occurred in the degree of unsaturation of stolon lipids, with all three survivor populations possessing higher proportions of unsaturated fatty acids than the baseline. Stabilizing selection also operated on this trait in the survivor populations, suggesting that it is of adaptive significance in cool climates. en
dc.format.extent 10 en
dc.language.iso eng
dc.relation.ispartof Annals of Botany en
dc.title Variation amongst survivor populations of white clover collected from sites across Europe: growth attributes and physiological responses to low temperature en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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