Genetics of flower size and nectar volume in Petunia pollination syndromes.

The two related Petunia species, P. axillaris and P. integrifolia, are sympatric at various locations in South America but do not hybridise.

The genetic dissection of floral pollination syndromes.

A major factor in the evolution of the angiosperms is the adaptation of plants to animal pollinators. The specific morphology of a flower, its color, nectar composition and scent production can all contribute to reproductive success by attracting pollinators and by limiting out-crossing with other species. It has now become feasible to dissect the genetic basis of plant adaptation to different pollinators.