【摘要】 <正> 在树木改良研究中,卓有成效的选择是建立在对林木群体间和群体内遗传变异的深入了解的基础上的。在那些具有广泛变异的群体内,由选择而产生的改良机会远远超过变异小的亚群体。由于同工酶分析技术的进步,林木群体内遗传变异的研究得到了迅速发展。最近Hans-J.Muhs(1981)综述了欧洲1976—1981年期间对欧洲赤松、挪威云松等七个树种的十二种同工酶系统的研究进展。目前林木同工酶遗传研究中所用的材料大都是针叶树种,而对阔叶树种则研究甚少。迄今,仅对白榆(Feret等,1971)、无花果(Valizadeh等,1977)、欧洲山杨(Guzina,1978)、欧洲山毛榉(Kim,1979)、毛果杨(Weber等,1981)、美国鹅掌楸(Houston等,1982)等阔叶树种的同工酶遗传方式进行过研究。本文报道Ⅰ-69杨[P、deltoides cv.“Lux”(ex.Ⅰ-69/55)]、小叶杨(P.simonii)、辽杨(P.maximowiczii)及其子代的过氧化物酶同工酶遗传分析的初步结果。更多还原

【Abstract】 This paper is a preliminary report on an investigation into the peroxidase iso-enzyme pattern variations in poplar parents and their controlled-pollination progenies. The aim of the investigation was to find a fast and reliable method for identifying the hybrids and evaluating the genetic variations. The peroxidase isoenzymes in combinations Populus deltoides cv. 69/55×P. simonii and P. deltoides cv. 69/55×P. maximowiczii were found to combine their parents bands. Therefore, it is reasonable to believe that the progenies carry the genetic imformation of the parents and are true hybrids. In these hybrids, the peroxidase bands show a regular variation. The F1 progeny of P. deltoides cv. 69/55×P. simonii (or P. maximowizii) shows a regular-segregation with the expected 1:1 Mendal ratio.更多还原