Outbreeding is usually advantageous because inbreeding suffers from depression. Nevertheless, mixed mating is very common in nature. We found two co-existing plant types, self-compatible and self-incompatible, in populations of the orchid Bulbophyllum orientale. The floral parts of this plant form a device to promote cross-pollination. Rancid substances are excreted to lure pollinators to the labellum, and pollens are attached to pollinators through a delicate mechanism. Given that many inflorescences and flowers are present on a clone and each inflorescence, respectively, pollinating insects may continuously visit inflorescences of the same clone and flowers of the same inflorescence but rarely continuously visit different populations separated by large distances.
Citation: Chen LJ, Zhang GQ, Li LQ, Zhang YT, Rao WH (2014) Development and Maintenance of a Cross-mixed Mating System in the Orchid Bulbophyllum orientale. J Phylogen Evolution Biol 2:124. doi: 10.4172/2329-9002.1000124