为了解不同种源地兴安落叶松种子播种品质及幼苗生长量的差异,以进行种源选择,利用方差分析方法分析了净度、优良度、生活力、千粒重、发芽率、苗高、基径、冠幅、根幅、>2cm侧根数、主根长和须根长的种源差异,对播种品质及幼苗生长量各指标进行了主成分分析,并对各种源进行了排序。结果表明:1)利用种子播种品质和播种苗生长量指标来进行种源选择是有效的,除基径、根幅外的其他各指标在种源间均存在显著差异。2)以须根长及苗高为主的兴安落叶松种源选择改良潜力巨大。须根长和苗高受高强度的遗传控制,广义遗传力值分别为0.936,0.850;冠幅、>2cm侧根数、主根长受中等强度的遗传控制;基径和根幅受遗传控制的程度低。3)综合分析,初步认为黑龙江阿木尔、内蒙古金河、黑龙江呼中、内蒙古莫尔道嘎种源综合表现良好,具有发展潜力,但其结论尚需在今后的区域化造林试验中进一步验证。

In order to expose the differences of seeds sowing qualities and seedling growths of Larix gmelinii between different provenances for provenance selection,this paper used anova method to analyze the differences of seed purity,seed soundness,seed viability,thousand seed weight,germination rate,seedling height,basal diameter,crown breadth,root range,> 2cm lateral root number,main root length and fibrous root length between provenances. Meanwhile it used principal component to analyze the indexes of seeds and seedlings and finally ranked the provenances by the provenance score.The results showed that using the seed quality and planting seedlings growth indicators for provenance selection is effective.The indexes except basal diameter and root range were significantly different among provenances.Provenance selection based on seedling height and fibrous root length has great improvement potential.Fibrous root length and seedling height were under high-intensity genetic control,the broad-sense heritability were 0.936 and 0.850 respectively;crown breadth,> 2cm lateral root number,and main root length were under moderate-intensity genetic control;basal diameter and root range were under low-intensity genetic control.On the basis of comprehensive analysis,this paper preliminarily considered that Heilongjiang Amur,Inner Mongolia Gold River,Heilongjiang Huzhong and Inner Mongolia Moerdaoga provenances have good performances,but the conclusion should be further validated in future regional afforestation.