Pathotype identification of Xanthomonas oryzae pv.oryzae isolated from high altitude Japonica rice production region in Yunnan Province
To identify the pathotype distribution and race differentiation of Xanthomonas oryzae pv. Oryzae (Xoo)collected from high altitude japonica rice production region in Yunnan Province,32 Xoo isolates from the regions with altitude higher than 1 800 m were tested on three sets of differential rice varieties. The results showed that 32 isolates were grouped into 11 pathotypes on the differential varieties set up by Yu, et al. (2005) ,7 pathotypes including resistant reaction mode RSSSSSS were firstly reported. The RRRSRSS was the dominant while RSSSSSS the most toxic. The 32 isolates were classified into 11 pathotypes and 7 ones on the differential varieties set up by Fang, et al. (1990) ,and Xu, et al. (2004),respectively. And in these cases of 7 and 5 pathotypes were also firstly reported respectively. There were 6 isolates which showed unreported pathotypes or new pathotypes on any one of the three sets of differential rice varieties. These 6 isolates might be further classified into 3 or 4 different pathotypes. The pathotype distribution of Xoo varied with the altitudes and regions.
NETL
NSTL
万方数据
维普
