| 摘要: |
| 来自广东省龙山林场杉木第二代种子园的39个自由授粉家系参加了1998年多点子代测定和2001年单点子代测定试验，结果表明：11年生子代测定林的树高、胸径、单株材积在家系和地点间差异达到极显著水平（P <0.01），8年生子代测定林生长性状的差异较小；家系平均树高、胸径、材积遗传力分别为0.24、0.26、0.30，主要生长性状受中等偏下的遗传力控制；第二代种子园材积遗传增益在1.88%～5.85%间,其遗传增益和现实增产效果高于1.5代种子园，也高于初级种子园。对11年生多点子代测定林家系进行了丰产性稳定性分析，选择出广谱丰产稳定家系5、8、17、19、23、26、28号，平均单株材积比群体均值提高3.39%；丰产家系3、7、15、21号和家系20、22、25号，分别适合龙山林场和曲江林场及相似立地条件地区限制性推广利用，平均单株材积比群体均值分别提高9.91%和4.89%；8年生单点子代测定林，以单株材积高于群体均值作为入选标准，有1、2、4、6、7、8、10、11、12、14、15、19等12个家系入选，平均单株材积比群体均值提高6.76%。 |
| 关键词: 杉木 第二代种子园 子代 增益 丰产稳定性分析 选择 |
| DOI： |
| 投稿时间：2009-08-04修订日期：2009-10-26 |
| 基金项目:广东省林业种苗专项“杉木良种选育”、广东省林业科技创新专项“松杉良种选育和高效栽培技术研究与示范”（2008KJCX005 01、2009KJCX007 1）、国家林业局林业公益性行业科研专项“乐昌油杉良种选育研究”（201004050）。 |
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| Study on genetic variations of progenies from the second-generation seed orchard and selection of superior families of Cunninghamia lanceolata（Lamb.）Hook. |
| Hu Dehuo |
| () |
| Abstract: |
| 39 open-pollinated progenies of Cunninghamia lanceolata from the second-generation seed orchard of Guangdong Longshan Forest Farm were used for progeny test in 1998 and 2001. The main results were summarized as follows: There were very significant differences （P <0.01） among families and sites in height, DBH and single stem volume in eleven-year progeny test plantations, there were little differences of growth traits in eight-year progeny test plantation; the family heritabilities of height, DBH and single stem volume were 0.24、0.26 and 0.30 respectively, which were considered as on comparatively low level; the stem volume genetic gain of second-generation seed orchard was 1.88%～5.85%,the genetic and actual gain was better than primary seed orchard. High-yield and stability analysis was carried out among eleven-year progeny test plantations in all sites, the families 5、8、17、19、23、26、28 were selected as steady and high-yield families whose average single stem volume was 3.39% more than the population’s; the families 3、7、15、21 and 20、22、25 were high-yield families which can be developed in the areas with ecotype like Longshan Forest Farm of Qujiang Forest Farm respectively, the average single stem volume was 9.91% and 4.89% more than the population’s; in eleven -year progeny test plantation, the average single of the families 1、2、4、6、7、8、10、11、12、14、15、19 was 6.76% more than the population’s. |
| Key words: Cunninghamia lanceolata second-generation seed orchard progeny gain High-yield and stability analysis selection |
