isolates of P.sojae were obtained from diseased soybean plants in 9 counties of Heilongjiang Province and 1 county of Jilin Province in Northeast of China.11 isolates were classified into 3 races;the rest that could n...isolates of P.sojae were obtained from diseased soybean plants in 9 counties of Heilongjiang Province and 1 county of Jilin Province in Northeast of China.11 isolates were classified into 3 races;the rest that could not be classified due to intermediate reactions were classified into 12 virulence types,suggesting virulence diversity of P.sojae in China.Isolates represented race 1,3 and 8.Race 1 was the most prevalent one,and races 3 and 8 were the first report in China.Our results suggest P.sojae is aboriginal in China.展开更多
Soybean Phytophthora root rot (Phytophthora sojae) is a severe disease all over the world. Soybean germplasm from central and southern China for resistance has been evaluated by American researchers on a large scale. ...Soybean Phytophthora root rot (Phytophthora sojae) is a severe disease all over the world. Soybean germplasm from central and southern China for resistance has been evaluated by American researchers on a large scale. P. sojae has been found frequently in northeast of China in recent years, but not systematic evaluation of soybean germplasm for resistance has occurred there. By means of hypocotyl inoculation, 922 cultivars/lines from northeast of China were screened and evaluated for their response to race 1, and 25 of P. sojae. Generally resistance was less frequent in northeast of China than in central and southern China. Five cultivars/lines were identified that confer resistant responses to race 1, 3, 8, 25 and four additional isolates of P. sojae. These cultivars/lines may provide valuable sources of resistance for future breeding programs.展开更多
基金Natural Science Foundation of Heilongjiang Province(C9912 )
文摘isolates of P.sojae were obtained from diseased soybean plants in 9 counties of Heilongjiang Province and 1 county of Jilin Province in Northeast of China.11 isolates were classified into 3 races;the rest that could not be classified due to intermediate reactions were classified into 12 virulence types,suggesting virulence diversity of P.sojae in China.Isolates represented race 1,3 and 8.Race 1 was the most prevalent one,and races 3 and 8 were the first report in China.Our results suggest P.sojae is aboriginal in China.
文摘Soybean Phytophthora root rot (Phytophthora sojae) is a severe disease all over the world. Soybean germplasm from central and southern China for resistance has been evaluated by American researchers on a large scale. P. sojae has been found frequently in northeast of China in recent years, but not systematic evaluation of soybean germplasm for resistance has occurred there. By means of hypocotyl inoculation, 922 cultivars/lines from northeast of China were screened and evaluated for their response to race 1, and 25 of P. sojae. Generally resistance was less frequent in northeast of China than in central and southern China. Five cultivars/lines were identified that confer resistant responses to race 1, 3, 8, 25 and four additional isolates of P. sojae. These cultivars/lines may provide valuable sources of resistance for future breeding programs.
