非洲破布木的变异性研究

通过对埃塞俄比亚Mizan Teferi及周边地区生长的乡土用材树种--非洲破布木自然种群分布情况调查,筛选了10株生长表现型较好的优良母树,采集了大量的供试种子样品,并对其种子外部特征和在苗圃中的发芽率和种苗生长表现进行了观察和分析对比.结果表明:在所有的研究属性中,其种子发芽率与苗高不存在相关性,但不同品种起源显示出较大的品种差异.笔者认为后代测试中生长表现优异的优势树木可以作为种子园营造和大面积人工林建设所需的优良母树予以推广.这项研究对于当地树种的改良利用和种质资源的多样性保护具有现实意义.

Variability studies Cordia africana an indigenous timber species of Ethiopia

The natural distributing populations of the indigenous timber species--Cordia africana that grew in and around the area of Mizan Teferi in Ethiopia were investigated. Bulk seed samples were selected from ten phenotypically superior trees in different natural populations. They were evaluated through the performance of their half-sibs and especially examined for variability in seed morphometrics, seed germination, and seedling growth at nursery stage. The results showed that there was no correlativity between germination percentage and seedling height, but there were significant differences among provenances in all studied attributes. The elite trees for establishing seed orchard were screened out in pilot study. The observed variability of this species would have applications in could be used to genetic resources conservation and tree improvement. The germplasm supplied from nurseries and germplasm availability enhance the protection and utilization of natural regeneration on farm.