益智种质资源表型性状的遗传多样性分析

对收集的90份益智种质资源的18个表型性状进行遗传多样性分析,以期为益智品种改良和种质创新提供依据.结果 表明:供试的益智种质具有丰富的遗传多样性,质量性状中多样性指数最高的为果形(1.1507),数量性状中多样性指数最高的为株高(2.0700),变异系数最大的为结果枝数(41.32％);提取的6个主成分累计贡献率为6...

Genetic Diversity Analysis of Alpinia oxyphylla Germplasm Resources by Phenotypic Traits

The genetic diversity by 18 phenotypic traits of 90 Alpinia oxyphylla germplasm resources was analyzed to provide the basis for the improvement and germplasm innovation of Alpinia oxyphylla varieties. The genetic diversity was rich in the germplasms. In qualitative traits, the highest Shannon-Wiener diversity index was for fruit shape (1.1507). In quantitative traits, the highest genetic diversity indexes were for plant height (2.0700), the highest coefficient variation (CV) was for the branch number of fruit (41.32%). The cumulative contribution rate of the first 6 principal components was 68.339%. The first principal component mainly reflected the leaf shape and plant height. The second principal component mainly reflected the appearance and growth state. The third principal component mainly reflected the branching status. The fourth principal component mainly reflected the output. The fifth principal component mainly reflected the amount of fruit. The sixth principal component mainly reflected the fruit yield. The experimental materials were divided into four groups by cluster analysis. Group I could be developed as lodging resistant and dwarfing varieties. Group II could be used as the material for improvement and cross breeding. Group III could be used as the production material. The fourth group could be used for the screening of ornamental materials. This study would provide a basis for the selection of excellent germplasm, rational utilization of resources, variety improvement and breed selection.