福建苦楝种子表型多样性研究

以福建32个种源地的苦楝种子为研究对象,测定、分析其表型多样性,结果表明:32个种源的种子表型性状中长、宽、平均单粒质量均存在极显著性差异,种子表型较为丰富;不同种源间种子表型性状变异系数均值的大小顺序是:种宽>种长>平均单粒质量,变异系数最大的是仙游种源,最小的为莆田种源;苦楝种子表型性状与11个气象因子的相关性均不显著;种子表型性状中种长和种宽累计贡献率达98.14%;32个种源可以聚为4类,第Ⅰ大类为仙游种源,其变异系数最大,第Ⅱ大类为德化、屏南、莆田、松溪种源,这些地区种子较小,但种子质量相对较大。

Study on Phenotypic Diversity of Melia azedarach Seeds in Fujian Province

The diversity of the phenotypic traits of the 32 provenances of Melia azedarach seeds in Fujian Province was studied.The results showed that the phenotypic diversity was abundant and there were significant differences in the phenotypic traits of M.azedarach seeds among the 32 provenances,including the length,width and average single weight of the seeds.The order of the mean variation coefficient of the phenotypic traits of M.azedarach seeds from different provenances was as:width > length > average single weight.The Xianyou provenance had the largest variation coefficient(11.70%),whereas the Putian provenance had the minimum variation coefficient(3.41%).The results showed that there were no significant correlations among the phenotypic traits of M.azedarach seeds and 11 meteorological factors.It was showed that the length and width of seeds were the main characters of the phenotypic traits of M.azedarach seeds,the accumulative contribution rate of the two indexes was up to 98.14%.The 32 M.azedarach provenances were clustered into four groups,the Xianyou provenance belong to the first group with the largest variation coefficient.The Dehua,Pingnan,Putian,Songxi provenances were classified into the second group with smaller variation coefficient,but relatively bigger average single weight.