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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。
The fruitful choice in tree improvement research is based on a deep understanding of the genetic variation among tree populations and within populations. Within those groups with a wide range of variation, the chances of improvement resulting from the selection far outweigh the subgroup of small variants. Due to the progress of isozyme analysis technology, the study of genetic variation in tree populations has been rapidly developed. Recently, Hans-J. Muhs (1981) reviewed the progress of studies on twelve isozymes in seven species of European pine, Pinus tabulaeformis and Norway pine from 1976-1981 in Europe. At present, most of the materials used in the genetic studies of isozymes of forest are coniferous species, while there are few studies on broadleaf species. So far, the results of this study have only been validated in the field of white elm (Feret et al., 1971), Fig (Valizadeh et al., 1977), Populus euphratica (Guzina 1978), European beech (Kim 1979), Populus trichocarpa (Weber et al. Catalpa bungei (Houston et al., 1982) and other broad-leaved tree species isozyme genetic mode were studied. In this paper, the peroxidase activities of I-69 Yang [P, deltoides cv. “Lux” (ex. I- 69/55)], P. simonii, P. maximowiczii and their offspring Isozyme genetic analysis of the preliminary results.