Premium
The highly cross‐fertile coral species, Acropora hyacinthus and Acropora cytherea , constitute statistically distinguishable lineages
Author(s) -
Márquez L. M.,
Van Oppen M. J. H.,
Willis B. L.,
Reyes A.,
Miller D. J.
Publication year - 2002
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.1365-294x.2002.01526.x
Subject(s) - biology , polyphyly , acropora , evolutionary biology , phylogenetic tree , introgression , mitochondrial dna , clade , molecular phylogenetics , zoology , ecology , genetics , coral , gene
A major challenge for understanding the evolutionary genetics of mass‐spawning corals is to explain the maintenance of discrete morphospecies in view of high rates of interspecific fertilization in vitro and nonmonophyletic patterns in molecular phylogenies. In this study, we focused on Acropora cytherea and A. hyacinthus , which have one of the highest potentials for interspecific fertilization. Using sequences of a nuclear intron, we performed phylogenetic and nested clade analyses (NCA). Both species were polyphyletic in molecular phylogenies, but the NCA indicated that they constitute statistically distinguishable lineages. Phylogenetic analysis using an intergenic region of the mitochondrial DNA (mtDNA), was inconclusive because of low levels of variability in this marker. The position of these two species differed between the nuclear DNA (nDNA) and mtDNA phylogenies and was also at odds with a cladistic analysis based on morphology. We conclude that despite the potential for high levels of hybridization and introgression, A. cytherea and A. hyacinthus constitute statistically distinguishable lineages and their taxonomic status is consistent with the cohesion species concept.