小麦品种慢叶锈性及其变异性和专化性研究

 本文研究了尤皮2号,黑芒麦,宜安52选,冀麦3号,平原50,阿夫和倌阳751七个小麦品种与小麦叶锈菌(Pucdnia recondita f.sp.tritici)的360、376、60、61四个小种的相互作用。在田间,慢锈品种的病害发展曲线下面积为0.6840-1.4928,而快锈品种尤皮2号的则为3.8499。在室内,慢锈品种与快锈品种相比,在各个抗性组份上均表现出病害发展慢的特性。然而当对品种不同发育阶段和采用不同浓度的菌量进行接种时,则慢锈性又表现出不同程度的变异性.对各组份的双向分组资料进行方差分析,都表明无论在品种间,小种间及两者的相互作用间,都存在着显著的差异。因此慢锈性也有专化性。在选育和利用慢锈品种时应予以高度的注意。

SLOW LEAF RUSTING,VARIABILITY AND SPECIFICITY IN WHEAT

The interactions between seven wheat cultivars, Yupi 2, Heiwangmai, A-fu, Xinyang 751, Jimai 3, Yian 52 Xuan and Pingyuan 50, and four physiologic races 60, 61, 360, 376 of Puccinia recondita f.sp.tritici have been studied.In field experiments, the areas under the disease progress curve of the slow rusting cultivars were 0.6840-1.4928, while that of the fast rusting cultivar was 3.8499.In green-house experiment, the slow rusting cultivars compared with the fast rusting cultivar showed "slowing" characteristics in every component of resistance.However, variability of slow rusting has been abserved in different developing stages of host and by using different amounts of inoculum.The two-way analysis of variance on components of slow rusting showed that differences were significant either between cultivars, races, or the interaction between cultivars and eces.These specificities warn that a slow rusting cultivar may turn into fast rusting under different conditions.