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文冠果(Xanthoceras sorbifoliaBge.)是我国特有的木本油料树种之一。它不仅适应性强、分布广、栽培面积大、结实早,且综合利用经济价值较高。但由于种子产量低、混杂,直接影响了栽培文冠果的经济效益。为了达到增加单位面积产量的目的,我国各文冠果栽培区,自1973年相继开展了优良类型的选择工作,并初选出一批优树。通过无性系鉴定,决选出了7株遗传增益大、抗逆性强的优良类型。1 材料和方法试验材料是从辽宁省评选出的优树中,采用1年生芽接繁殖苗,于1981年定植。选用20
Xanthoceras sorbifoliaBge. Is one of the unique woody oilseeds in China. It not only adaptable, widely distributed, cultivated area, strong early, and comprehensive utilization of higher economic value. However, due to low seed yield, mixed, a direct impact on the economic benefits of culture crown. In order to achieve the purpose of increasing yield per unit area, the cultivated area of various fruits in each county of our country has successively carried out excellent types of selection work since 1973 and selected a group of excellent trees. Through clonal identification, we chose seven excellent types with large genetic gain and strong resistance. MATERIALS AND METHODS Experimental materials were selected from the best trees in Liaoning Province, using 1-year-old seedlings sprouted in 1981 colonization. Choose 20