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COMMENTS ON GENOMIC GENERA IN THE TRITICEAE (POACEAE)
Author(s) -
Kellogg Elizabeth A.
Publication year - 1989
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1989.tb15058.x
Subject(s) - polyphyly , monophyly , biology , triticeae , cladistics , tribe , genus , taxon , zoology , evolutionary biology , phylogenetics , botany , genome , clade , genetics , anthropology , sociology , gene
Generic delimitation in the Triticeae has long been problematical because the extensive hybridization in the group is not readily accomodated in a hierarchical classification. The genomic genera of Löve (1984) are one solution, but fully one‐third of them are polyphyletic, incorporating 2 or more genomes. The suggestion that the tribe be considered a single genus (Stebbins, 1956) is theoretically defensible—the genus would be strictly monophyletic—but probably impractical. This paper presents a cladistic analysis of the tribe that differs from previous analyses in that it uses only strictly monophyletic (monogenomic) groups as terminal taxa; hybrids (heterogenomic groups) are shown as reticulations. Monophyletic groups can then be delimited to minimize the number of polyphyletic genera. A classification incorporating genomic information is derived from the phylogeny.