Phenotypic diversity analysis and superior family selection of seed traits in six Acer species in northeast China
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摘要: 槭属(Acer)植物种类多，分布广，集药用、观赏等经济价值于一体。为探析槭属种子的表型分化程度和遗传变异规律，本文对槭属6个树种的种子进行了测定分析。结果显示：槭属种子性状在种间和种内均存在显著差异(P < 0.05)，各性状的种间变异系数为9.72% ~ 42.30%，各性状遗传力均值为0.56 ~ 0.97；除翅宽与空壳率外，其他表型性状之间均呈极显著正相关；通过UPGMA聚类分析，可将6个槭属树种划分为3类；主成分分析结果表明，两个主成分的累计贡献率达75.981%。通过多性状综合评价法，以10%的入选率筛选出6个优良家系，其千粒重性状的遗传增益均超过10%，筛选出的优良材料可为东北地区槭属种质资源的保护及开发利用奠定基础。Abstract: Acer is a widely distributed genus containing many important medicinal and ornamental species. Thus, evaluating the germplasm resources of different Acer species is important. In this study, seed phenotypic traits of six Acer species (A. mono Maxim, A. mandshuricum Maxim, A. tegmentosum Maxim, A. ginnala Maxim, A. triflorum Komarov, and A. pseudosieboldianum (Pax) Komarov) were measured and analyzed to explore the relationships among different species. Variance analysis indicated that all investigated traits were significantly different among and within species (P < 0.05). Phenotypic variation coefficients and heritability of different traits ranged from 9.72% - 42.30% and 0.56 - 0.97, respectively. Correlation analysis indicated that all coefficients were positive and significant, except for that between wing width and shell rate. Cluster analysis showed that the six Acer species were clustered into three groups. Principal component analysis showed that the cumulative contribution rate of the first two principal components was 75.981%, indicating that these components contained most of the information on the investigated traits of the samples. According to multi-trait comprehensive evaluation, with the rate of 10%, six excellent families were selected, and the genetic gains for kilo-seed weight traits were above 11%. This research provides a basis for the protection, development, and utilization of Acer germplasm resources in northeast China.
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Keywords:
- Acer /
- Seed traits /
- Phenotypic variation /
- Genetic gains /
- Selection
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