【摘要】 选用３２个小麦品种（系），在其幼穗长度１．２ｃｍ时，喷施１．８‰的化学杂交剂ＢＡＵ—２，探讨其诱导小麦品种的育性及其生长发育的表现。结果表明：（１）９０％以上的品种（系）不育率达９５％～１００％，ＢＡＵ—２杀雄效果稳定；（２）ＢＡＵ—２对小麦柱头的活力有影响，人工、自然授粉结实率均较低，各为６．０％～３６．８％、０．６％～３４．２％，品种间差异极显著；（３）ＢＡＵ—２对株高、穗下节间长度、穗长、千粒重、发芽势和发芽率均为副效应；对单株穗数有所增加，它们变幅分别为０．３～１６．７ｃｍ、１．６～１１．１ｃｍ、０～１．４ｃｍ、２％～９９％和２％～９９％、０．３～４．４个；小穗数与对照相近。这些不同程度的差异都是由品种间对ＢＡＵ—２的不同反应所致。更多还原

【Abstract】 varieties(strains)of winter wheat were used in the experiment. Wheat wassprayed with 1. 8%, CHA BAU-2 when the length of young spikes was about 1. 2cm.The male sterility induced by BAU-2 and. the effect of BAU-2 on growth and development in 32 varieties (or strains)were studied. The results showed that: (1)BAU-2 resulted in nearly complete male sterility,over 90% wheat varieties were stern,about95 %-100% each. (2) BAU-2 had some impact on stigmata and seed-sets. The rate ofseed-set were up to 6.0%-36. 8% when treated with supplementary pollination, however the natural pollination were only 0. 6%-34. 2 %.The differences among the different varieties were significant. (3)BAU-2 had negative effect on plant height,the firstinternode length counted from the top,the ear length,the 1000-kernel weight,the germinating force and the germinating ratel but spikes per plant increased,;The variateranged from 0. 3 to 16.7cm,1. 6 to 11. 1cm,0 to 1.4cm,2% to 99% and 2% to 99%;0. 3 to 4.4,respectively. The number of spikelets was very close to that of contrast varieties. These differences were caused because of the different reactions of various varietiesto BAU-2.更多还原