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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Restriction fragment length polymorphism analysis of CCDD genome species of the genus Oryza L.
Plant Molecular Biology 1991 May
Restriction fragment length polymorphisms (RFLPs) were studied in fourteen accessions of CCDD genome allotetraploid wild rice species (Oryza latifolia, O. alta and O. grandiglumis). Fourteen nuclear RFLP markers previously mapped in AA genome-cultivated rice were used as probes. A phylogenetic tree, constructed by parsimony analysis based on RFLPs, grouped the accessions according to their geographic origin from Central or South America. Oryza alta, O. grandiglumis and one accession of O. latifolia grouped together as a subgroup, and our results suggested that the three taxa should be considered as populations of a single complex species. Duplicate loci, representing the two constituent genomes of the allotetraploid, were observed for most RFLP markers. By comparing RFLPs from the allotetraploids with those from a CC genome diploid wild species (O. officinalis), it was possible to detect RFLPs specific for both the CC and DD genomes of the allotetraploid. In inter-accession F2 populations, independent segregation of RFLP markers for CC and DD genomes was observed.
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