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连续两年在大田和温室对 WL84811的杀雄效果进行了研究。结果表明:(1)WL84811是一种良好的小麦杀雄剂。从花粉母细胞形成到花粉双核期间喷施,均可诱导雄性不育,不育率可达100%;(2)喷施后抽穗延迟1～4天,平均延迟2天;(3)株高平均降低5厘米左右,主要是缩短倒数第一、二节间的长度,尤以缩短倒数第一节间长度为显著;(4)杀雄后的植株,天然异交结实率达71.9%,人工授粉异交结实率达77.7%;(5)喷药时期与喷药浓度之间有互作。适宜的喷药时期和浓度因品种而异。就品种农大146而言,花粉双核期是适宜的喷药时期,1000～1200克/公顷是适宜的喷药浓度。结合本试验结果,讨论了 WL84811诱导小麦植株雄性不育的特点、影响天然异交结实率的因素以及适宜喷药时期和浓度筛选的问题。
For two consecutive years in field and greenhouse on the killing effect of WL84811 were studied. The results showed that: (1) WL84811 is a good wheat killing agent. Male sterile could be induced by spraying from the formation of pollen mother cells to the nuclei of pollen, and the sterility could be up to 100%. (2) The heading was delayed by 1 ~ 4 days after spraying, with an average delay of 2 days. (3) The plant height Average reduction of about 5 cm, mainly to shorten the length of the penultimate and two internodes, especially to shorten the reciprocal of the first internode length is significant; (4) after killing the male plants, natural outcrossing rate of 71.9%, artificial Pollinated outcrossing rate of 77.7%; (5) Spraying period and spraying concentration between the interaction. Appropriate spraying period and concentration vary by variety. In terms of cultivar Nongda 146, the pollen dinuclear stage is suitable for the spraying period, and the suitable spraying concentration of 1000 to 1200 g / ha is suitable. Based on the results of this experiment, the characteristics of male sterility of wheat plants induced by WL84811, the factors affecting the natural outcrossing rate and the suitable selection of spraying period and concentration were discussed.