华南及菲律宾稻白叶枯病病原菌株致病性比较研究

 用国际鉴别寄主及中国鉴别寄主分别在华南及菲律宾两地,同时多次重复研究、比较、分析两地的稻白叶枯病病原菌株的致病力。用人工剪接法测定明确了中国及菲律宾的病情分级调查记载标准呈显著相关,均能反映华南与菲律宾的病情调查实际结果。对4个菲律宾和5个华南菌群而言,"金南风"及"脱脱普"全感,而"早生爱国3号"和"爪哇14号"则全抗。"黄玉"对华南菌群Ⅰ及Ⅱ抵抗,但对Ⅲ及Ⅳ群与4个菲律宾菌群则全感。"IR8"及"Cas209"对5个华南菌群全感,而"DV85"则全抗。"IR20"及"IR1545-339"抗华南菌群Ⅰ、Ⅱ、Ⅲ及Ⅳ,但感染Ⅴ群。"TN1"及"金刚30"等品种全部感染华南及菲律宾菌群。"IR26"抗华南菌群Ⅰ、Ⅱ、Ⅲ、Ⅳ和菲律宾菌群Ⅰ,但感染华南菌群Ⅴ和菲律宾菌群Ⅱ、Ⅲ、Ⅳ。试验结果指出:华南菌群Ⅲ、Ⅳ的,致病力与菲律宾菌群Ⅰ相仿,而华南菌群Ⅴ则与菲律宾菌群Ⅳ相类似。此外,还研究比较分析了华南菌株与东南亚菲律宾、泰国和印度尼西亚诸国菌株间的致病力的异同情况。

COMPARISON OF VIRULENCE OF XANTHOMONAS CAMPESTRIS PV.ORYZAE IN SOUTH CHINA AND IN THE PHILPPINES

The correlation coefficient between scoring systems developed in China and IRRI,based on infection of Xanthomonas campestris pv.oryzae by clipping method of inoculation,was highly significant.
The international differential varieties including Japanese-Kinmaze,Kogyoku,Te-tep,Wase Aikoku 3,and Java 14;IRRI-IR8,IR20,IR1545-339,DV85 and Cas 209;and Chinese differential varieties-TN1,Bao-Tai-Ai and IR26,with special genes for pv.oryzae resistance were evaluated in South China(Guangdong) and in the Philippines for resistance to local pathotypes.Kinmaze and Te-tep were susceptible,and Wase Aikoku 3 and Java 14 were resistant to the four Philippine and the five South China pathotypes.Kogyoku was resistant to South China pathotypes Ⅰ and Ⅱ,but susceptible to South China pathotypes Ⅲ and Ⅳ,and to the four Philippine races.IRRI differential varieties,IR8 and Cas209 were susceptible and only DV85 was resistant to all South China pathotypes,IR20 and IR1545-339 were resistant to South China pathotypes Ⅰ,Ⅱ,Ⅲ,and Ⅳ but susceptible to pathotype Ⅴ.Chinese differntial varieties,TN1 and Jin-gang30 were susceptible to all South China pathotypes and IRRI races.IR26 was resistant to South China pathotypes Ⅰ,Ⅱ,Ⅲ and Ⅳ,and Philippine race Ⅰ,but susceptible to South China pathotype Ⅴ and Philippine race Ⅱ,Ⅲ,Ⅳ.Results indicated that the isolates in terms of virulence of South China pathotype Ⅲ and Ⅳ may correspond to Philippine race Ⅰ,and the pathotype Ⅴ to Philippine race Ⅳ respectively.