摘要
以广东省和江苏省里下河农科所新近育成的部分籼稻品种 (系 )、扬州大学农学院的研究组以不同抗源杂交后代向抗感两个极端选育的 9份籼稻品系以及另一组合向抗病方向选育的 5份籼稻品系为材料 ,设置抗感病对照 ,进行田间纹枯病菌接种试验。结果表明品种间对纹枯病的抗性存在极显著差异 ;聚类分析将参试材料按抗性水平高低聚为 6类 :高度感病、感病、中等感病、中等抗病、抗病和更高水平抗病。广东品种在 6种类型中均有分布 ,但属于抗和更抗类型的品种只有 3个。扬州大学农学院对抗×抗杂交向抗感两个极端选育的品系在病级的中间类型中几乎没有分布 ;而向抗病方向选育的品系则仅分布于中抗至抗病的范围内 ,且属于抗的品种数占此类品种的 6 0 %。江苏省里下河农科所近些年育成的几个品种则只分布于后 4类之中 ,且最高水平抗性的 3个品种中 ,其品种占 2 / 3。表明水稻对纹枯病的抗性是可遗传的性状 。
Sixty four indica cultivars/lines from Guangdong and Jiangsu Province, Lemont and SY63/LH (susceptible checks) and Jasmine 85 and Teqing (moderate resistant checks), were used to analyze the resistance to rice sheath blight (Rhizoctonia solani Kühn). The results indicated that there were highly dominant differences of resistance among these cultivars. The cultivars should be divided into six groups of highly susceptible, susceptible, moderately susceptible, moderately resistant, resistant and higher resistant, by means of Ward Minimum Variance Cluster Analysis. The cultivars from Guangdong distributed in all of six groups, only a fourteenth of them in resistant and higher resistant groups. There was nearly no cultivar of third type in middle disease reaction group. The forth type cultivars, which bred for accumulation of resistance from the cross of Teqing/91 3, just distributed in moderate resistant to resistant groups, 60% of them in resistant group. The scientists of Lixiahe Agricultural Research Institute put them attention to breeding of resistance to sheath blight in recent years, so cultivars bred by them just distributed among later groups and two of total three higher resistant cultivars bred by them. The results supported that rice resistance to sheath blight was a hereditable character and selection to resistance was effective.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2001年第3期218-220,共3页
Chinese Journal of Rice Science
基金
国家"948"资助项目
国家"九五"攻关项目
关键词
水稻
纹枯病
聚类分析
抗病性
育种
rice
sheath blight
cluster analysis
breeding
disease resistance
