四川乡土杨树优树无性系培育与苗期评价

在前期对四川乡土杨树资源考查、优树选择和资源收集的基础上,开展了四川乡土杨树优树无性系培育与苗期评价。结果表明:不同无性系间1年生扦插苗的生长量差异很大,杂交杨Ⅰ无性系CN0727、CN0728、CN0729、滇杨、西南杨、光果西南杨、三脉青杨长势好,生长量大,是选育适宜四川低海拔地区栽培杨树良种的优良种质,从中直接选育良种的可能性较大;贡嘎杨是一类珍稀的优良杨树种质资源,直接选育用于园林绿化使用的良种可能性较大。而其他的杨树无形性系长势弱,对四川低山海拔地区自然生态条件适应性较差,直接利用的可能性较小。

Cloning of Plus-trees from Sichuan Native Poplars and Evaluation of its Growth at Seedling Stage

Cloning of plus-trees selected from Sichuan native poplars and evaluating its growth at seedling stage were carried out on the basis of investigation,selection and collecting poplar resources in Sichuan.The results indicated that the biomasses of one-year-old cutting seedlings were remarkably different among the different poplar clones.Clones of hybrid named CNO727,CN0728 and CN0729,P.yunnanensis,P.schneideri,P.schneideri var.tibetica,P.trinervis grew well and were adaptable to the low altitude in Sichuan,so it is probable to select improved varieties from these clones.P.gonggaensis was one of the rare poplar resources and could be directly used for garden greening.The other poplar clones grew weakly and showed bad adaptability to the natural ecological conditions of the low altitude in Sichuan,so it is impossible to use them directly.