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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (19): 186-189.

所属专题： 玉米； 农业生态

• 植物保护 农药 • 上一篇    下一篇

玉米丝黑穗病菌冬孢子萌发湿度及云南玉米新品种抗性鉴定研究

吴景芝1,魏永田2,李自萍2,何月秋1,3   

  • 收稿日期:2009-01-04 修回日期:2009-04-08 出版日期:2009-10-05 发布日期:2009-10-05
  • 基金资助:

    省部级

Effect of soil humidity on germination of Sphacelotheca reiliana teliospore and head smut resistance identification for new maize varieties in Yunnan Province

  • Received:2009-01-04 Revised:2009-04-08 Online:2009-10-05 Published:2009-10-05

摘要：

在22℃和有萌发的玉米种子及土壤湿度为20％～25％条件下，有利于玉米丝黑穗病菌冬孢子萌发，但在无玉米种子时，则不能萌发。采用1%冬孢子制作的带菌土接种方法于2007年和2008年在两个病圃鉴定了云南省302份玉米新品种对丝黑穗病的抗性。结果表明，高抗、抗病、中抗、感和高感品种分别为65份，118份，27份，86份和6份，各占供试材料的21.45﹪，38.94﹪，8.91﹪，28.38﹪和1.98﹪。依据株发病率就是损失率的特点，建议在重病区，只宜推广抗病和高抗品种。

关键词: 日粮纤维, 日粮纤维, 生长猪, 消化率, 消化道, 消化酶

Abstract:

Teliospores of Sphacelotheca reiliana could germinate very well at 22℃ and between 20％～25％soil humidity with germinating maize seed, however, they could not without the seed. In 2007 and 2008, 302 new maize varieties from Yunnan Province were identified for their head smut resistance by the inoculation with soil carrying 1% teliospore in two disease nurseries. Among them, 65, 118, 27, 86 and 6 varieties were highly resistant, resistant, moderately resistant, susceptible and highly susceptible to the disease with 21.45%, 38.94%, 8.91%, 28.38% and 1.98%, respectively. It was suggested that only should the resistant and highly resistant varieties be extended in severe disease areas based on the coincidence of incidence with loss rate.