Journal
PHYTOPATHOLOGY
Volume 92, Issue 7, Pages 750-754Publisher
AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/PHYTO.2002.92.7.750
Keywords
mapping; R gene
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Bacterial blight, caused by Xanthomonas oryzae pv. oryzae, is a serious disease of rice worldwide. A new dominant gene for bacterial blight resistance in rice, Xa25(t), was identified from Minghui 63, a restorer line for a number of rice hybrids that are widely cultivated in China. This gene conferred resistance to Philippine race 9 (PX0339) of X. oryzae pv. oryzae in both seedling and adult stages. It was mapped to the centromeric region of chromosome 12, 2.5 cM from a disease resistance gene-homologous sequence, NIBS 109, and 7.3 cM from a restriction fragment length polymorphism marker, G1314. The genomic location of this gene is similar to the previously identified blast resistance genes, Pi-to and Pi-tat.
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