苹果砧木种子潜带病毒可能性观察研究

采用症状直观、病芽转接和木本指示植物嫁接鉴定相结合的方法,观察研究了苹果砧木八棱海棠(M.micromalus)花叶病植株自然授粉种子、湖北海棠中的平邑甜茶和泰山海棠与难咽(M.micromalus)人工杂交种子传递病毒的情况。结果表明,这些砧木种子可以传递某些病毒,发病程度和发病比率因苗龄、品种不同而异。播种后前三年发病比率,八棱海棠花叶后代分别为1.5％,8.8％,21.1％;甜茶×难咽后代分别为1.2％,2.5％,2.6％;泰山海棠×难咽后代第二年为12.0％,第三年为35.6％。

STUDY ON THE POSSIBILITY OF SEED LATENT VIRUS OF APPLE ROOTSTOCKS

For studing the transmission of mosaic in Malus, the experiment was carried out in the way of both direct observation of symptoms and identification of healthy plant lor woody plant indicator budded with diseased bud.Results indicate that apple rootstocks from seeds of baleng Haitang (M.micromalus)tree infected by mosaic virus and from some hybrid seeds of M. hupehensis x Nanyan (M. micromalus) can transmit some virus diseases. The severety and extent of the diseases vary with ages of seedlings and varieties. During the first three years of the experiment, the percentages of Baleng Haitang seedlings with mosaic symptoms were respectively 1.5%, 8.8% and 21.1%, whereas those of pinyi Tiancha x Nanyan seedlings were respectively 1.2%,2.5%, and 2.6%.