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对无性繁殖蔬菜资源圃保存的192份大蒜种质的8个鳞茎产量构成数量性状(鳞茎高、鳞茎直径、鳞茎重、鳞芽高、鳞芽背宽、鳞芽数、鳞茎盘厚、鳞茎盘直径)进行了观测、统计分析和分类研究。结果表明:8个数量性状均存在较大变异;依据频次分布和5级分组的惯例,提出了各个性状相应的分级标准;相关分析表明,鳞茎单产与除鳞芽背宽之外的其他7个性状显著相关,其中与鳞茎重和鳞茎直径相关系数最大,相关系数分别为0.983 77和0.726 9;主成分分析表明,与产量相关的前3个主成分累积贡献率达74.84%,在第一主成分的特征向量中,以鳞茎重最大、鳞茎直径次之,再次是鳞茎高和鳞芽数;不同种质鳞茎产量差异显著,结合主坐标分析结果,可将参试资源分为高、较高、中、较低、低、极低6个产量级别,并筛选到单产在15 t/hm2以上的资源3份。
The yield of 192 cultivars of germplasm of 192 germplasm collected from asexual vegetative vegetable garden constituted quantitative traits (high bulb diameter, bulb diameter, bulblet weight, high shoot height, Diameter) were observed, statistical analysis and classification studies. The results showed that there were significant variances among the eight quantitative traits. Based on the frequency distribution and the practice of the five-level grouping, the corresponding grading standards of each trait were proposed. The correlation analysis showed that seven other bulbs The correlation coefficient was the highest with bulb weight and bulb diameter, the correlation coefficients were 0.983 77 and 0.726 9 respectively. The principal component analysis showed that the cumulative contribution rate of the first three principal components related to yield reached 74.84% Among the eigenvectors, the bulb weight was the largest, the bulb diameter was the second, and the bulb height and the number of the buds were again. The yield of different germplasm bulbs was significantly different. According to the results of principal coordinate analysis, the resources of the test were divided into high and high , Middle, lower, lower and lower 6 yield levels, and screened 3 resources with a yield above 15 t / hm2.