Comparative analysis of the parasitism between soybean and tobacco populations of Heterodera glycines

Authors：刘海勤; 刘泉成; 赵洪海

Source：植物保护, 2016, 42(2).

DOI：10.3969/j.issn.0529-1542.2016.02.011

• Heterodera glycines
• Glycines max
• Nicotiana tabacum
• reproduction factor
• parasitism

The parasitism of the soybean population (SCNS )and tobacco population (SCNT )of Heterodera glycines (soybean cyst nematode,SCN)was tested separately on five soybean cultivars (SCN host differentials)and nine tobacco cultivars through pot experiments.It was found that,on the five soybean cultivars,the mean reproduc-tion factor (Rf=P f/P i )of the SCNS was 0.60 (0.14-1.90)with a high Rf of 1.90 on the control susceptible cultivar ‘Lee’,and the mean Rf of the SCNT was only 0.18 (0.06-0.44)with a mean Rf of 0.44 on ‘Lee’.The SCNS could hardly parasitize the nine tobacco cultivars with a mean Rf of 0.06 (0.00-0.10),but the SCNT infec-ted well with the tobacco cultivars with a mean Rf of 1.26 (0.45-1.95).In 35 d after the inoculation,the juven-iles of SCNS and SCNT were both rare in the roots of different soybean cultivars with nearly the same infection ra-tios,but in the roots of different tobacco cultivars,none of SCNS juveniles was found and the mean juvenile num-ber of SCNT was 26.5 (14.6-57.0).The results indicated that the SCNS was the physiologic race No.14,and SCNT was a new SCN pathogenic type which greatly differed in parasitism from SCNS .

• Institution
  青岛农业大学