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对洛南古城油松种子园37个无性系共222个单株的雌雄球花量及2年生球果量进行调查,并对数据进行处理分析,研究其遗传变异规律。结果表明,无性系间雌球花量、雄球花量2、年生球果量、树高及冠幅均存在显著差异。雌雄球花及球果产量在各无性系内分株间存在一定的差异,雌球花量和结实量越多,其差异相对小得多。油松单株南北枝条间雌球花量及2年生球果量差异极显著,雄球花量差异不显著;有的无性系单株存在“偏雌偏雄现象”;根据雌球花量2、年生球果量、树高、胸径、冠幅5个数量性状,采用育种值综合评分法筛选出6个优良无性系:285#、273#、291#、10#、266#、289#。
Investigations were made on the male and female flowers and the number of 2-year-old bulbs in 222 clones of 37 clones of Pinus tabulaeformis in the ancient city of Luonan. The data were analyzed for their genetic variation. The results showed that there were significant differences in the male flower number, the male flower number 2, the annual fruit number, the tree height and the crown width among clones. The male and female flowers and cones production in each clonal ramets there are some differences between the female flowers and the amount of more solid, the difference is relatively much smaller. There was significant difference between male and female twigs in South and North branches of Pinus tabulaeformis, but there was no significant difference in male and female. There were “partial female and male” in some clones; , The number of annual cones, the height of tree, the diameter at breast height and the width of crown. Six elite clones, 285 #, 273 #, 291 #, 10 #, 266 # and 289 #, were screened by breeding score comprehensive evaluation method.