旱柳花粉能够萌发,花粉管能进入小叶杨柱头。受精过程基本正常。杂交障碍主要表现在:花粉管在花柱基部生长受阻;花粉管在子房腔中缠绕;受精频率低;胚和胚乳发育不协调,胚出现异常发育、停滞发育和败育现象。本文支持以不协调性模型解释杂交障碍的机制。报道了旱柳和小叶杨属间杂交原胚期胚珠培养的成功。 Willow pollen germination, pollen tube can enter the leaflet Yang stigma. The process of fertilization is basically normal. Obstacles to hybridization were mainly manifested in that the growth of pollen tube was blocked at the base of style; the pollen tube was entangled in ovary cavity; the frequency of fertilization was low; the development of embryo and endosperm was uncoordinated; the embryo developed abnormally, stagnated and aborted. This article supports a mechanism for explaining incompatibility models for dysbacteriosis. The success of ovule culture in the hybrid embryogenesis of Salix matsutake and Populus tomentosa was reported.