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自然界中单倍体的自然发生率只有10[-5]～10［－8］，所以主要依靠人工诱导[1]。为了提高诱导频率，在所采用的物理手段中，激光诱导具有一定的作用[2,3]。试验从Populnsnigra．P．tomentosn等18种杨树的雄株材料中，筛选出一种激光诱导离体花药培养较易获得分化南的材料，P．n
The natural occurrence of haploid in nature only 10 [-5] ~ 10 [-8], so mainly rely on artificial induction [1]. In order to increase the induction frequency, laser induced has a certain effect in the physical means used [2,3]. Experiment from Populnsnigra. P. Tomentosn and other 18 kinds of poplar male plant materials, screening out a laser-induced in vitro anther culture more easily differentiated south of the material, n