云南松优良家系超级苗选择研究

 为探讨云南松苗期选择的依据和标准,加速现有优良遗传资源的早期、短期开发利用,对20个家系1 a苗木的生长性状差异进行了分析.结果表明:家系之间以及同一家系不同个体之间的苗高、地径生长量存在极显著差异,且苗高生长量差异明显大于地径生长量.因此,以各家系平均高生长量加1倍标准差为最低标准进行超级苗选择,在11 331株育种群体中共选超级苗1 629株,入选率为14.3%.其中,超级苗平均高度为8.92 cm,比育种群体平均高度增加35.9%;超级苗平均地径为3.50 mm,比育种群体平均地径增加3.6%.

Study on super seedling selection of superior families of Pinus yunnanensis Franch

In order to explore the accordance and standard of selection in seedling stage of Pinus yunnanensis,we analyzed the growth character differences of annual seedlings on twenty families,that can speed up the exploitation and utilization of the existing excellent genetic resources early and in short time,The results showed that in both height and diameter growth aspects,there was very significant difference among families and different individuals of the same family,height growth difference significantly greater than the one in diameter.So we selected superior seedling using the sum of average growth and standard deviation as the minimum standard.There were 1 629 plants to be selected in the 11 331 breeding population,the ratio is 14.3%.The mean height of the superior seedlings is 8.92 cm,it is more than the average of overall 35.9%,and the mean volume of diameter is 3.48 mm,it is more than the average 3.6%.