LAUSR

The cultivated area devoted to rice crops (Oryza sativa) in Brazil has expanded in recent years, along with improvements in yield. This has prompted the continuous exchange of material from Active Germplasm Banks between government breeding programs. When placed in a greenhouse for multiplication purposes, rice accessions resulting from exchanges between ARS/USDA (Agricultural Research Service/United States Department of Agriculture) showed little or no germination. The accessions were sent to the tissue culture laboratory of BAG-CNPAF (Embrapa National Rice and Bean Research Center) with a view to recovering embryos by aseptically removing the seed coat of ten seeds from each accession. Bacterial colony growth concomitant to germination inhibition was observed in some accessions, from which four bacterial isolates were obtained. The isolates and their respective associated rice accessions are: Bac 1887 from accession Chikanari 2 (CIor 12454), Bac 2821 from Fujisaka 2 (PI 184496), Bac 2926 from Ehime Suit...