Angiosperm Phylogeny Group
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The Angiosperm Phylogeny Group, or APG, refers to two international groups of systematic botanists who came together to try to establish a consensus view of the taxonomy of flowering plants that would reflect new knowledge in angiosperm relationships based upon molecular systematics studies. Three papers resulted from these collaborations, commonly referenced as 'APG I (1998),' 'APG II (2003)' and 'APG III (2009);' and were largely attempts to deal with the deficiencies in prior angiosperm classifications (Cronquist 1981, Thorne 1992 and 2001, Takhtajan 1997) as seen by phylogenetic theories b...
The Angiosperm Phylogeny Group, or APG, refers to two international groups of systematic botanists who came together to try to establish a consensus view of the taxonomy of flowering plants that would reflect new knowledge in angiosperm relationships based upon molecular systematics studies. Three papers resulted from these collaborations, commonly referenced as 'APG I (1998),' 'APG II (2003)' and 'APG III (2009);' and were largely attempts to deal with the deficiencies in prior angiosperm classifications (Cronquist 1981, Thorne 1992 and 2001, Takhtajan 1997) as seen by phylogenetic theories based on analysis of DNA. The first paper by the APG marked an important change in how angiosperm classifications were done, as prior classification systems had been done by one or two scientists, while this paper was the effort of 29 botanical systematists to make sense of the large number of molecular phylogenies being studied in the angiosperms. This made angiosperms the first large group of organisms to be systematically reclassified largely on the basis of molecular characteristics.
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