ibclogo XVI International Botanical Congess

Abstract Number: 2374
Poster No. = 789


PHYLOGENY OF ORYZA , POACEAE, INFERRED FROM PROLAMIN (SEED STORAGE PROTEIN) GENE


Irene M. Boyle, Khidir W. Hilu. Virginia Tech, Blacksburg, VA 24061


Oryza encompasses two cultivated and 20 wild species. Seventeen of the species are delineated into the diploid genomes B,C,E,F and the polyploids BBCC and CCDD while five contain unidentified (?) genomes. Cultivated O. sativa and O. glaberrima contain the AA genome. The gene encoding the 10 kDa prolamin was used to examine the phylogeny of Oryza. Phyllostachys aurea was used as an outgroup. Oryza meyeriana (?), O. granulata (?), O. australiensis (EE), and O. brachyantha (FF) represent the most basal taxa. Species containing a CC genome (CC, BBCC, CCDD) plus O. punctata (BB) formed a lineage. Within the latter lineage, O. minuta (BBCC) forms a clade with O. rhizomatus (CC). A strongly supported clade emerged containing O. punctata (BB) and species of the CCDD genome. Species relationships within the AA genome were not resolved.

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