用百分制评选三种金花茶优株试验

<正> 一、引言 株选是花卉育种中行之有效,立竿见影的一种方法。株选主要有两部分组成:对优良单株的选择与鉴定和将优株进行营养繁殖。把这两个组成部分结合在一起,称为营养系选择或无性系选择。营养系选择是一种比较简单的育种方式,而有事半功倍之效。在花卉育种中,由于很多种类都较易进行营养繁殖,因此更有其特殊的重要性。

USING THE HUNDRED-MARK SYSTEM TO SELECT. SUPER-TREESIN CAMELLIA CHRYSANTHA (HU) TUYAMA, C. TUNGHINENSISCHANG AND C FUBIPETALA Y WAN ET S Z HUANG

Super-tree selection by means of hundred-mark system, using appropriate criteria, is a short-cut in landscape plant breeding, and has been proven to be effective in cultivar improvement for many herbaceous flowers, flowering trees and shrubs. During the early spring of 1984 and that of 1985, the authors went to Fangcheng, Dongxing, Long'an and Nanning of Guangxi, to select super-trees, of Camellia chrysantha (Hu) tuyama, . C. chrysantha var., C. tunghinensis Chang and C. pubipeiala Y. Wan et S. Z. Huang, using the 100-mark system. 16 super-trees or vegetative strains were selected in March 1984, and some of them were checked again in March 1985. Besides, 3 new super-trees or strains, one of each species of C. chrysantka, C.tunghinensis and C .pubipeiala, were selected. All the 19 super-trees are floriferous, with bigger and more doubled and good tints of yellow flowers, resistant to diseases and with good adapti-bility to adverse conditions. Some of these super-trees have been propagated by grafting on the same species rootstocks. And all of them will be propagated in this way. After the this, cultiaer experiments as well as regional tests are to be carried out in the near future.