English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/133669
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


What is PpdH2 doing in winter varieties?

AuthorsIgartua Arregui, Ernesto ; Karsaï, Ildikó; Kiss, Tibor; Gracia Gimeno, María Pilar ; Casas Cendoya, Ana María
Issue DateJun-2016
Citation12th International Barley Genetics Symposium (Minneapolis, Minnesota, USA. 26-30 June 2016)
AbstractTemperatures during barley growing season have been on the rise in the Mediterranean basin over the last 40 years. Under these circumstances, winter cereal farmers are exposed to a difficult choice of cultivars for autumn sowing, from spring cultivars in warm areas to strictly winter cultivars. The choice must take into account frost probability for the region. The most common process found in winter cereals to achieve frost tolerance is vernalization, although high frost tolerance can also be attained in cultivars almost devoid of vernalization requirement. We have carried out an experiment with winter barley subjected to insufficient vernalization to test the influence of allelic diversity at genes HvFT1 (VrnH3) and HvFT3 (PpdH2) on development. The experiment used selected plants of the population Esterel x SBCC016, grown in growth chambers. Three F4 lines of each of the four haplotypes determined by HvFT1 and HvFT3, selected with markers, were tested under three different day lengths, 8, 12 and 16h light. The plants were deliberately chosen to be strictly winter types). They were partially vernalized (45 days) before being transferred to the day length chambers, to test the performance of the haplotypes under conditions close to the natural target of the study. The plants showed a large range of duration of development and other phenotypic traits in response to day length, but also between the genetic haplotypes tested. The relationship of the phenotypic development with the expression levels of genes HvFT1, HvFT3, VrnH1 and VrnH2 will be presented and discussed, together with possible agronomic implications. Flowering time is closely related to HvFT1 expression, which seems controlled by a balance between its positive regulator VrnH1 and its well-known repressor VrnH2, but also by an epistatic interaction between VrnH2 and HvFT3, with further implications on tillering.
Description1 .pdf copy (A3) of the original poster presented by the Authors.
Appears in Collections:(EEAD) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
IgartuaE_12thIBGS-2_2016.pdf533,32 kBAdobe PDFThumbnail