【摘要】 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#。更多还原

【Abstract】 The strobilus production of female flowers,male flowers and 2-year-old cone of 222 plants from 37 clones of Pinus tabulaeformis Carr. in Luonan Gucheng seed orchard was investigated and the genetic variation law was analyzed based on above the data.The result indicated that the difference was remarkable within the clones on strobilus production of female and male flowers,2-year-old cone,tress height and tress crown size.The some difference existed within the plans among the clones on strobilus production of female and male flowers and cone production.The more the strobilus production of female flowers was,the smaller their difference was.The difference in the north and south branch on one clone on strobilus production of female flowers and the 2-year-old cone was extremely significant,but that on strobilus production of male flowers was not remarkable.The "phenomenon of toward female or male toward" also occurred in the some plants of clones.According to 5 quantity characters of the strobilus production of female flowers,2-year-old cone production,tree high,tree diameter at chest height,crown size,6 good clones of No.285,No.273,No.291,No.10,No.266,No.289 were selected by integrated scoring method of breeding value based on ranking(CICR).更多还原