| 刘海勤, 刘泉成, 赵洪海*.大豆孢囊线虫大豆和烟草群体寄生性比较分析[J].植物保护,2016,42(2):68-73. |
| 大豆孢囊线虫大豆和烟草群体寄生性比较分析 |
| Comparative analysis of the parasitism between soybean and tobacco populations of Heterodera glycines |
| 投稿时间：2015-03-08 修订日期：2015-03-27 |
| DOI： |
| 中文关键词: 大豆孢囊线虫 大豆 烟草 繁殖系数 寄生性 新致病类型 |
| 英文关键词:Heterodera glycines Glycines max Nicotiana tabacum reproduction factor parasitism new pathogenic type |
| 基金项目:公益性行业(农业)科研专项(201503114); 中国烟草总公司科技项目(110200902065); 山东省“泰山学者”建设工程专项; 山东省普通本科高校应用型人才培养专业发展支持计划项目 |
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| 中文摘要: |
| 通过盆栽试验, 测定大豆孢囊线虫(Heterodera glycines, soybean cyst nematode, SCN)大豆群体(SCNS)和烟草群体(SCNT)对5个大豆品种(SCN生理小种鉴别寄主)和9个烟草栽培品种的寄生性。结果发现, SCNS在5个大豆品种上的平均繁殖系数(Rf=Pf/Pi)为0.60(0.14~1.90), 在感病对照品种‘Lee’上平均Rf高达1.90; SCNT在5个大豆品种上的平均Rf为0.18 (0.06~0.44), 在感病对照品种‘Lee’上Rf为0.44。SCNS对9个烟草品种几乎无寄生性, 平均Rf为0.06 (0.00~0.10); SCNT则能寄生9个烟草品种, 平均Rf为1.26 (0.45~1.95)。接种35 d后, 在不同大豆品种根内SCNS和SCNT的幼虫数量均极少, 侵染率基本相同; 在不同烟草品种根内SCNS的幼虫数量均为0, 而SCNT的幼虫数量平均为26.5 (14.6~57.0)。研究表明, 供试SCNS属于14号生理小种, 但供试SCNT与之寄生性差异大, 属于新的SCN致病类型。 |
| 英文摘要: |
| 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 reproduction factor (Rf=Pf/Pi) of the SCNS was 0.60 (0.141.90) with a high Rf of 1.90 on the control susceptible cultivar ‘Lee’, and the mean Rf of the SCNT was only 0.18 (0.060.44) 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 (0.000.10), but the SCNT infected well with the tobacco cultivars with a mean Rf of 1.26 (0.451.95). In 35 d after the inoculation, the juveniles of SCNS and SCNT were both rare in the roots of different soybean cultivars with nearly the same infection ratios, but in the roots of different tobacco cultivars, none of SCNS juveniles was found and the mean juvenile number of SCNT was 26.5 (14.657.0). 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. |
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