Understanding diploid diversity: A first step in unraveling polyploid, apomictic complexity in Amelanchier.

Premise Of The Study: Delimitation of Amelanchier species is difficult because of polyploidy and gametophytic apomixis. A first step in unraveling this species problem is understanding the diversity of the diploids that contributed genomes to polyploid apomicts. This research helps clarify challenging species-delimitation problems attending polyploid, apomictic complexity.

Effects of apomixis and polyploidy on diversification and geographic distribution in Amelanchier (Rosaceae).

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Premise Of The Study: Amelanchier polyploid apomicts differ from sexual diploids in their more complex diversification, greater species problems, and geographic distribution. To understand these differences, we investigated the occurrence of polyploidy and frequency of apomixis. This research helps clarify species delimitation in an evolutionarily complex genus.