水稻品种对纹枯病抗性鉴定研究

THE IDENTIFICATION OF RESISTANCE OF RICE CULTIVARS TO Jhanateporus Cucumeris DONK

两年鉴定表明,抗病1号、IR20、IR42、TeTeP、IET4699较抗纹枯病,兼抗白叶枯病,可作抗源使用.抗性次于上述品种而优于一般感病品种的有早稻7807-1、浙85-3、76-20、J36;中稻鉴262、665、滇瑞308、Basmati370选、F8-5-7-1、临籼12、81-18、512,其中鉴262、665还高抗白叶枯病,农艺性状好,可大面积推广应用. 本文还讨论了株高和密度对纹枯病的影响.一般情况下,它们对纹枯病的影响远不及抗病品种的影响大.

It has been testified that Kang Bing1, IR_(20), IR_(42), TeTep, IET_(4699)are more resistant to Sheath and Culm Blight and Bacterial Leaf Blightthrough two-year identification and can be used as resistant resources.The cultivars which are inferior to those above-mentioned but superiorto common susceptible once in resistance are as follows: early season culti-vars, such as 7807-1, Zhe 85-3, 76-20, 36, middle season cultivars,such as Jian 262, 665, Dian Rai138, Basmati370-selection, F8-5-7-1,Lin xian12, 81-18, 512. Among them, Jian 262, 665, highly resistantto Bacterial Leaf Blight, have very well agronomic characters, and issuitably to commercial use. The effects of plant height and plant density on Sheath and CulmBlight discussed in this paper, are less than those of cultivars in generalconditions.