The exploitation of chromosome recombination between Lolium and Festuca to assemble, locate, and identify gene combinations that may underpin future sustainable grassland production

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dc.contributor.author Humphreys, Michael W.
dc.date.accessioned 2010-04-26T09:47:37Z
dc.date.available 2010-04-26T09:47:37Z
dc.date.issued 2010-04-26
dc.identifier.citation Humphreys , M W 2010 , ' The exploitation of chromosome recombination between Lolium and Festuca to assemble, locate, and identify gene combinations that may underpin future sustainable grassland production ' pp. 21-33 . en
dc.identifier.other PURE: 146342
dc.identifier.other dspace: 2160/4598
dc.identifier.uri http://hdl.handle.net/2160/4598
dc.description Humphreys, M. W. (2003). The exploitation of chromosome recombination between Lolium and Festuca to assemble, locate, and identify gene combinations that may underpin future sustainable grassland production. In: Zwierzykowski, Z.; Surma, M.; Kachlicki, P.(Eds). Application of novel cytogenetic and molecular techniques in genetics and breeding of the grasses. Proceedings of the PAGEN International Workshop, Poznan, Poland, 1-2 April 2003, pp. 21-33. Proceedings of the PAGEN International Workshop,'Application of novel cytogenetic and molecular techniques in genetics and breeding of the grasses', Poznan, Poland, 1-2 April 2003. en
dc.description.abstract Winter hardiness of grasses depends mainly on their frost tolerance and resistance to snow mould pathogens. Many authors reported the main role of soluble carbohydrates in cold-induced resistance to frost or fungi. The accumulation of hexoses activates hexokinase, key sugar-sensing enzyme that initiates a signal transduction process that could be a signal to production of PR (pathogenesis-related) proteins. High levels of sugars influence the osmotic potential of plant tissues and can this way limit their colonization by fungi. Under cold treatment changes in cell wall structure and accumulation of polysaccharides and lignin in cell walls can also develop. The strengthening of cell walls limits tissue penetration by fungal mycelium and decreases efflux of water from cells under osmotic stresses. In performed studies accumulation of soluble carbohydrates and phenolics in Lolium-Festuca introgression forms and androgenic forms derived from two Festulolium cultivars ¿Felopa¿ and ¿Sulino¿ was analysed. The plants were chosen to studies after field selection in winter conditions in ¿opuszna. On the basis of the observed changes in sugar content the studied forms were compared with parent species and divided into three groups: group-accumulating soluble carbohydrates like Lolium and like Festuca; the third group was called ¿mixed type¿. The winter hardiness and resistance to snow mould in the field conditions, laboratory frost tolerance and changes in the sugar content were analysed. The introgression forms of Festuca type were characterised by better winter hardiness and higher frost tolerance than plants of Lolium type. The forms derived from Festulolium cv. ¿Sulino¿ were more tolerant to frost and winter conditions than genotypes derived from cv. ¿Felopa¿. Large differences in phenolic compound accumulation were observed among the analysed forms. However, this parameter was not correlated with the winter hardiness of plants. Similarly, no direct influence of soluble carbohydrate and phenolic compound content on plant resistance to snow mould was found. en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof en
dc.title The exploitation of chromosome recombination between Lolium and Festuca to assemble, locate, and identify gene combinations that may underpin future sustainable grassland production en
dc.type Text en
dc.type.publicationtype Conference paper en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Non peer reviewed en


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