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Characterization of QTLs for flowering date in a mapping population of the legume species Phaseolus vulgaris

AutorSantalla Ferradás, Marta; González Fernández, Ana María; Jiménez Galindo, José Cruz; Godoy Montiel, Luis Alberto; Yuste-Lisbona, Fernando J.; Lozano, Rafael
Fecha de publicación6-jul-2014
EditorUniversity of Saskatchewan
Citación6th International Food Legumes Research Conference & 7th International Conference on Legume Genetics and Genomics (2014)
ResumenAdaptation to the environment and reproduction are dependent on the date of flowering in the season. Despite the genetic and complexity and quantitative nature of flowering time, many genes regulating this trait has been molecular isolated and functional characterized in the model species Arabidopsis thaliana, even some of their homologues have also been identified in other legume species. However, regulatory genes involved in the transition to flowering have not been characterized so far in common bean (Phaseolus vulgaris L.). With this aim, we have evaluated the effect of photoperiod on flowering date of the legume species, Phaseolus vulgaris and described the genetic architecture of this trait. For this purpose, a mapping population of 185 recombinant inbred lines (RILs) derived from a cross between a temperate and a tropical inbred line was generated and grown under short- and long-day photoperiod conditions. Multi-environment QTL analyses for flowering date and photoperiod sensitivity were conducted; as result additive and additive-by-environment effects were found. In addition, additive-by-additive epistatic effects were detected by means of two-locus QTL analyses. Overall, the results obtained revealed that the genetics of flowering date and photoperiod sensitivity is complex in nature, where both individual additive and epistatic effects are important components of the genetic variance. By using these QTLs in a marker assisted-selection program, it would be possible to select for desirable photoperiod sensitivity alleles leading to better adapted common bean varieties.
DescripciónPóster presentado en "6th International Food Legumes Research Conference & 7th International Conference on Legume Genetics and Genomics". Celebarado en Saskatoon, Saskatchewan (Canadá) entre los días 7 y 11 de julio de 2014.
Versión del editorhttp://knowpulse2.usask.ca/iflrc-iclgg/?q=node/89
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