@ARTICLE{TreeBASE2Ref16696, author = {Brent D. Mishler}, title = {Reproductive biology and species distinctions in the moss genus Tortula, as represented in Mexico.}, year = {1990}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {Systematic Botany}, volume = {15}, number = {}, pages = {86--97}, abstract = {The prevailing biological species concept, which gives primacy to the role of interbreeding in causing the coherence of distinct species, predicts that species in asexual groups should be less discrete than those in sexual groups. Under this view, sexual groups should be more variable than asexual groups within populations (because of recombination), but less variable among populations (because of gene flow). This prediction is tested using 23 sympatric species in the moss genus Tortula in Mexico. Reproduction in this group ranges from frequently sexual to completely asexual, as measured by frequency of sporophyte production. Species distinctness is compared using two approaches. In the first, distinctness is measured cladistically as the number of autapomorphies present. In the second, distinctness is measured phenetically through morphometric studies. The result is the same under either approach: there is no particular correlation between mode of reproduction and species distinctness. It is concluded that processes other than interbreeding may be responsible for species formation and maintenance even in sexual groups.} }

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