Abstract:
Objective To reveal the variation and regularity of Quercus acutissima seeds and provide references for the conservation and genetic improvement of Q. acutissima germplasm resources.
Method Variance analysis, cluster analysis and correlation analysis were used to analyze and compare the phenotypic traits of Q. acutissima seeds from seven natural populations.
Result Significant differences were found in the length, width, aspect ratio, surface area, volume and thousand-grain quality of Q. acutissima seeds among and within groups. The coefficient of variation of each trait ranged from 10.34% to 28.18%, and the average phenotypic differentiation coefficient was 78.84%, indicating that inter-population variation is the main source of variation. The phenotypic traits showed extremely significant correlations; using hierarchical clustering. The seven groups could be divided into two groups.
Conclusion There are abundant phenotypic variations in Q. acutissima seeds among and within these populations, and the result of cluster analysis showed no obvious correlation with the geographical distribution of each population. This study can provide a theoretical basis for the protection and utilization of diversified Q. acutissima germplasm resources.
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