However,
some promising model systems have been developed
that include closely related bee and bird-pollinated
flowers, such as Ipomoea, Mimulus, and Lotus. Recent
studies of floral developmental genetics have identified
numerous genes important in the development of the
floral phenotype, which are also potential candidates for
involvement in shifts between bee-pollination and bird
pollination. As more whole-genome information becomes
available, progress should be rapid.