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白榆为两性花,去雄难度大,花期又短,这给白榆测交工作带来了很大困难.吉木萨尔林木良种试验站在白榆测交会战工作中发现三个自花授粉不育单株,经过1977—1985年套袋鉴定,选育出了白榆优树不育系吉木萨尔Ⅰ、Ⅱ号.白榆不育系的选育成功,为开展白榆测交工作、选配优势组合、建立高配合力亲本种子园和利用杂种优势提供了条件.一、吉选Ⅰ、Ⅱ号的来源、形态特征和主要性状白榆不育系吉木萨尔Ⅰ、Ⅱ号,原株大树分别位于玛纳斯平原林场和察布查尔县东方红公社.1974年,我们从原株大树上采细枝条,1975年嫁接定植于吉木萨尔林木良种
White elm for the bisexual flowers, to masturbation difficulty, flowering and short, which gives the elm test work has brought great difficulties.Jimusal forest seed test station in the elm cross-dating work found three self-pollination Sterile plant, after 1977-1985 bagging identification, elite tree elm elm Ji breeding Ⅰ, Ⅱ, elm sterile selection of breeding success, in order to carry out the work of white elm test , The combination of advantages and disadvantages, the establishment of high-ability parent seed orchard and the use of heterosis provided the conditions.Generation, morphological characteristics and main characters Ji Yu Ⅰ, Ⅱ elm sterile lines JimusarⅠ, Ⅱ, The original trees are located in the Manas plain farm and Chabachar County, Dongfanghong commune in 1974, we picked from the original plant trees on the branches, in 1975 grafted in Jimusar forest seed