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贾晨, 李杰, 罗建勋, 杨马进. 毛叶山桐子超级苗选择[J]. 四川林业科技, 2017, 38(5): 73-75,88. DOI: 10.16779/j.cnki.1003-5508.2017.05.017
引用本文: 贾晨, 李杰, 罗建勋, 杨马进. 毛叶山桐子超级苗选择[J]. 四川林业科技, 2017, 38(5): 73-75,88. DOI: 10.16779/j.cnki.1003-5508.2017.05.017
JIA Chen, LI Jie, LUO Jian-xun, YANG Ma-jin. The Superior Seedling Selection of Idesia polycarpa[J]. Journal of Sichuan Forestry Science and Technology, 2017, 38(5): 73-75,88. DOI: 10.16779/j.cnki.1003-5508.2017.05.017
Citation: JIA Chen, LI Jie, LUO Jian-xun, YANG Ma-jin. The Superior Seedling Selection of Idesia polycarpa[J]. Journal of Sichuan Forestry Science and Technology, 2017, 38(5): 73-75,88. DOI: 10.16779/j.cnki.1003-5508.2017.05.017

毛叶山桐子超级苗选择

The Superior Seedling Selection of Idesia polycarpa

  • 摘要: 以1 a、2 a、3 a生的毛叶山桐子苗木为研究对象,探讨毛叶山桐子超级苗选择的标准和方法。结果表明,同龄级个体间的苗高、地径生长量存在着丰富的遗传变异,为选择超级苗提供物质基础;苗高与地径存在着显著的正相关,毛叶山桐子超级苗以地径为主、苗高为辅,结合形质特征进行选择;按苗高、地径平均生长量的1.1倍为超级苗选择标准,经初选、复选,共选择1 a、2 a、3 a生超级苗分别为25株、13株与13株,入选率分别为0.38%、0.33%与0.39%,且超级苗有较大的遗传增益。

     

    Abstract: Based on data of 1 year~3 years old seedling of Idesia polycarpa, studies were made of the standard and methods of superior seedling selection. The results showed that there were abundant genetic variations in height and diameter growth among the same age individuals, which provided material basis for choosing super seedlings. Height and basal diameter were significantly positively correlated. the choice of superior seedling depended on basal diameter increment primarily and height increment as auxiliary. From the first and the second selection, 51 superior seedlings aged 1~3 were selected by height and diameter which were no less than 1.1 times of the average amount. The selected ratio were from 0.33% to 0.39%. And superior seedlings had larger genetic gain.

     

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