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The origins of an important cactus crop, Opuntia ficus ‐ indica (Cactaceae): new molecular evidence
Author(s) -
Griffith M. Patrick
Publication year - 2004
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 - 10.3732/ajb.91.11.1915
Subject(s) - cactus , biology , ficus , domestication , botany , polyphyly , phylogenetic tree , crop , ecology , clade , biochemistry , gene
Opuntia ficus ‐ indica is a long‐domesticated cactus crop that is important in agricultural economies throughout arid and semiarid parts of the world. The biogeographic and evolutionary origins of this species have been obscured through ancient and widespread cultivation and naturalization. The origin of O. ficus ‐ indica is investigated through the use of Bayesian phylogenetic analyses of nrITS DNA sequences. These analyses support the following hypotheses: that O. ficus ‐ indica is a close relative of a group of arborescent, fleshy‐fruited prickly pears from central and southern Mexico; that the center of domestication for this species is in central Mexico; and that the taxonomic concept of O. ficus ‐ indica may include clones derived from multiple lineages and therefore be polyphyletic.