Abstract
The MADS-box APETALA1 genes control plant transition to flowering and the floral morphogenesis proper. The experimental evidence of APETALA1 overexpression presumes that this class of genes can also directly affect time to flowering. We therefore cloned and compared homologs of APETALA1 class genes from potato (Solanum tuberosum cultivars adapted to long day conditions) and its wild relative Solanum demissum, a short-day subtropical species. The homologs isolated from these plants belong to the subclass FRUITFULL. The inconsiderable variations in the primary structure of these homologs cannot explain the diverse photoperiodic reactions of particular Solanum genotypes.
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