Are mutation status of K-ras , p53 and allelic losses at 9p and 18q prognostic markers in patients with pancreatic cancer?
None of the studied molecular markers was identified as an independent factor determining survival prognosis.
The statistically significant correlation between perianth zygomorphy and oligandry suggests that the evolution of floral symmetry could be canalized by developmental or spatial constraint. Interestingly, the evolution of polyandry in an actinomorphic context appears as an alternative evolutionary pathway to zygomorphy in Asteridae. These results may be interpreted either in terms of plant-pollinator adaptation or in terms of developmental or physical constraints. The results are discussed in relation to current knowledge about the molecular bases underlying floral symmetry.