中抗褐稻虱稻种抗性鉴定方法的研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


STUDIES ON THE METHODS FOR EVALUATION OF MODERATE RESISTANCE TO THE BROWN PLANTHOPPER, NILAPARVATA LUGENS (HOMOPTERA:DELPHACIDAE) IN RICES,ORYZA SPP.
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    采用改良苗期群体筛选法,可将对褐稻虱具中抗水平的栽培稻和野生稻与感虫稻种区分开来。但如接虫量过大,则中抗稻种会被评为感虫。此外,当采用植株损害系数评价耐害性时,可用植株生长速率来代替原公式中的植株干物质比率。本法可提高工效,并且不会伤害植株,有利于抗虫品种的后代选育。

    Abstract:

    The modified seedling bulk screening test was used to evaluate the resistance to the browns planthopper in cultivated and wild rice,where five second or third-instar nymphs were used to infest each seedling at the 3.5 to 4 leaf stage.The results indicated that this screening technique could be used efficiently to identify resistance not only in the resistant rices,but also in the moderately resistant ones.But if the insect population was changed to 14 nymphs per seedling at the same leaf stage,the plants with moderate resistance would be rated as susceptible.Tolerance was evaluated as functional plant loss index (FPLI) based on plant dry weight using the formula described by Panda and Heinrichs (1983 ).On the other hand,a similar mathemetical formula based on plant growth rate used was as follows:The FPLI that was calculated on the basis of plant growth rate was demonatrated to exhibit the same trend as that based on plant dry weight.Therefore using the former parameter in determining the FPLI will save time and labor,and is not detrimental to the seedlings,since it only involves measurement of plant height.

    参考文献
    相似文献
    引证文献
引用本文

吴荣宗 李冠雄.中抗褐稻虱稻种抗性鉴定方法的研究[J].华南农业大学学报,1989,(4):72-78

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: