华南农业大学学报 |
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钟伟华 石斌 周达 黄永权 张民兴 张民兴 摘 要:对火炬松原产地耐寒与一般两类基因资源林的生长表现研究结果表明,前者保存率高,适应性强,生长均匀,差异不显著;后者则相反,保存率较低,生长优劣悬殊,差异显著,优于我国早年引入的种批,为重要的遗传改良资源,其中有10个编号较优良,它们多产自美国东南沿海,尤其是墨西哥湾各州.在31.3%入选率下,材积相对遗传增益大20.84%;2~5株小样求得的生长早-晚相关趋势与前人研究一致,唯确定程度略低. Growth Performance of the Loblolly Pine Genetic Resources ZHONG Wei-hua(College
of Forestry, South China Agric. Univ., Guangzhou 510642, China) Abstract:This
paper studied the growth performance of loblolly pine gene resources
with in cold-hardy and regular provenances. The results indicated that
the cold-hardy gene resources showed higher survival rate, better
adaptability and uniformity in growth and without significant
difference. The regular gene resources were the contrary, with lower
survival rate, great variation in growth and significant difference
among seed sources. The growth performance was superior to that of the
early introduced loblolly pine seed lots in China. These provenances are
the important genetic resources for tree improvement. Among these gene
resources there were 10 superior numbers from the southeast coastal
states in the U.S.A., especially those from the Mexican Bay States.
Under 31.3% selection rate, the relative genetic gain was 20.84%. The
juvenile-mature growth correlation trend derived from small samples of 2~5
trees, was in accordance with the former researches, only with a
slightly lower the determination coefficient. |
基金项目:“七五”国家重点科技攻关(75-07-01-38);广东省科委重点课题;联合国发展计划署项目(CPR/91/153) 作者简介:钟伟华(1927-),男, 教授. 作者单位:钟伟华(华南农业大学林学院, 广东 广州 510642) 石斌(华南农业大学林学院, 广东 广州 510642) 周达(华南农业大学林学院, 广东 广州 510642) 黄永权(广东省林业厅种苗站, 广东 广州 510173) 张民兴(广东省林业厅种苗站, 广东 广州 510173) 李远球(英德市火炬松种子园, 广东 英德 513000) 参考文献: [1]王明庥. 林木育种学概论[M]. 北京:
中国林业出版社,1989. 184-190. 收稿日期:2000年3月21日 出版日期:2001年1月1日 |