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Identification of candidate genes involved in the photoperiod response in common bean (Phaseolus vulgaris L.)

AutorQuiroga, Gabriela
DirectorGonzález Fernández, Ana María ; Santalla Ferradás, Marta
Palabras claveFlowering time
Photoperiod
Phaseolus vulgaris L.
Candidate genes
Fecha de publicación18-sep-2015
EditorCSIC - Misión Biológica de Galicia (MBG)
CitaciónIdentification of candidate genes involved in the photoperiod response in common bean (Phaseolus vulgaris L.) (2015)
ResumenThe regulation of flowering time has been crucial in the evolutionary process and domestication of crops, selecting the most favourable season to initiate reproductive development, maximizing yields. However, the genetics of photoperiodic response in common bean (Phaseolus vulgaris L.) has not been elucidated yet, making difficult the prediction of how varieties would response to changes in climate, which is important for breeding programs in order to ensure the optimal time to flower and to expand the range of cultivation of the crop. In this work, we identified and studied the expression pattern of key genes involved in flowering time in common bean. This proposal has used the completed common bean sequence and the knowledge of the molecular basis of flowering in Arabidopsis and other legumes in order to identify homologue genes in common bean species. The second step of this study was to analyze differential gene expression of some candidate genes in two contrasting varieties: PMB0225 and PHA1037, grown in chamber under Short Day (SD) conditions, looking for changes in gene expression before the transition to flowering. Common bean conserves members of both GI and FT families, which have key roles in flowering induction in Arabidopsis as well as in other legumes. However, the route seems to differ from the model species. Expression analyses suggest a role for PvGI1, PvGI2, PvFTa3 and PvFTb3 in the induction of flowering under SD, with expression patterns differing between the common bean varieties PMB0225 (photoperiod-insensitive and early flowering habit) and PHA1037 (photoperiod-sensitive and late flowering habit). Both kind of genes seem to act independently in the activation of flowering, suggesting a different regulation from Arabidopsis.
Descripción32 páginas.- Trabajo fin de Máster in Plant Biology and Biotechnology,.2014-2015, de la Universidad Autónoma de Barcelona.
URIhttp://hdl.handle.net/10261/168231
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