Identifying And Mapping New Gene Xa32(t) For Resistance To Bacterial Blight (Xanthomonas Oryzae Pv.oryzae, Xoo) From Oryza Meyeriana L.

The Bacterial Blight of rice (BBR) which caused by (Xanthomonas oryzae pv. oryzae, Xoo) is one of the most important bacterial disease on the world, it take heavy loss to the world rice product.When the pathogen invade into the rice, the disserve is very severity, and the chemical control is not so useful as we wish. So it always bring on seriouse output loss. It will be an economical and effective way to find and use new resistance genes to bacterial blight to breed new rice cultivars to control the epidemic of the bacterial blight. Up to present, there have been a lot of resistance gene found and cloned, and many of them were applied to the production of rice. But for the pathogenic bacteria variance frequently, the disciplinarian on the disease occurrence is complex, and there are much differences between planting areas, the agrochemical control is not so good but take with environment pollution, time consuming, hard sledding and so on. Therefore, using high efficiency and broad-spectrum resistant gene for genetic modify maybe the best way to control this disease.The wild rice is good at stress resistance, high-yelding, diease resistance. Therefore, it is attractive to find new resistance gene for Bacterial blight from the wild rice cultivars. In this experiment, we used SSR technology to identify and map the new gene from somatic hybridization generation of the O.meyeriana crossed with O.sativa cv Dalixiang. Finally, we find a new resistance gene xa32(t) and map it on the long arm of 12 chromosome, named xa32(t) temporarily. The genetic distance from RM8216 and RM20A on the same side is 6.9cM and 1.7cM.