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通过对灰楸4个流域的137份种质资源的1年生嫁接苗10个表型性状的变异与多样性分析,结果表明:10个表型性状在流域间、流域内均达极显著差异。流域间10个表型性状平均变异系数、遗传变异系数分别为15.81%、29.08%;遗传方差分量都约在70%及以上,说明10个表型性状的差异主要为遗传因素,从流域内变异看,叶部指标和皮孔数在泾河流域和汾河流域变异较大,生长指标和比叶重、含水量、在渭河流域和嘉陵江流域变异较大。总的Shannon-Weaver指数为6.995,趋势是嘉陵江流域>泾河流域>汾河流域>渭河流域。基于表型性状的聚类分析把4个流域的种质在遗传距离为3.65处分为3类。第1类包含来自渭河流域的28份种质和嘉陵江流域的46份种质,第2类是汾河流域的24份种质,第3类是来自泾河流域的39份种质,叶长、叶宽、叶柄长、叶面积、生长量5个表型性状变异随海拔的升高具有一定的连续性。
Through the analysis of the variation and diversity of 10 phenotypic traits of 1 year - old grafted seedlings of 137 germplasm resources in four river basins, the results showed that all the 10 phenotypic traits had extremely significant differences among the catchment and catchment. The mean coefficient of variation and genetic coefficient of 10 phenotypic traits in the basin were 15.81% and 29.08%, respectively. The genetic variance components were both about 70% and above, indicating that the differences of the 10 phenotypic traits were mainly genetic factors. See leaf index and number of holes in the Jinghe River and Fen River basin variation, growth indicators and specific leaf weight, water content in the Weihe River and Jialing River basin variation. The total Shannon-Weaver index is 6.995, the trend is Jialing River Basin> Jinghe River Basin> Fenhe River Basin> Weihe River Basin. Based on the cluster analysis of phenotypic traits, the germplasms of the four basins were divided into three categories at a genetic distance of 3.65. The first group includes 28 germplasm from the Weihe River Basin and 46 germplasms in the Jialing River Basin. The second class includes 24 germplasm types in the Fenhe River Basin. The third type is derived from 39 germplasm types in the Jinghe River Basin. The leaf length , Leaf width, petiole length, leaf area and growth of five phenotypic traits with a certain degree of continuity with the elevation.