摘要
以省内粳稻品种(系)为主要研究对象,探讨稻瘟病苗瘟、叶瘟、穗颈瘟的相关关系。在1979年、1980年及1989年,共测定了375份材料的苗瘟与叶瘟、叶瘟与穗颈瘟、苗瘟与穗颈瘟之间的相关系数,经显著性测验,均为极显著,数值达到中等正直线相关和强正直线相关。研究结果证明了水稻品种各生育时期的抗性表现基本一致,因此,品种的抗性鉴定用多次苗期鉴定代替一年一次生育期鉴定是可行的。还对各瘟间关系与品种熟期、各瘟关系在杂交后代的反应等,进行了研究。
375 rice cultivars of Heilongjiang Province were used for studyingthe relationships between various blast types in 1979,1980 and 1989.Thecorrelation coefficients between seedling and leaf-blasts,leaf-and neck-blasts and seedling-and neck-blasts of these materials were estimated.The significances among them reached 'very significant' by significanttest,the values were'moderate positive linear correlation'and'strongpositive linear correlation'.The results indicated the fundamentalconsistancy of resistance to blast during various growth stages of rice.Therefore,estimation of rice cultivars for their resistance to blastduring different growth stages once a year as traditionally done couldbe replaced by seedling tests many times within one year.Relationshipsbetween blast types during different stages and date of maturity of ricecultivars,and reactions various blast types on hybrids were alsoinvestigated.
出处
《植物保护学报》
CAS
CSCD
北大核心
1991年第4期293-297,共5页
Journal of Plant Protection
关键词
水稻
叶瘟
苗瘟
穗颈瘟
相关系数
blast of seedling——blast of leaf——blast of the ear-neck——correlation of coefficient
