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 yunnanen- sis, we analyzed the growth character differences of annual seedlings on twenty families, that can speed up the ex- ploitation 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 in- dividuals of the same family, height growth difference significantly greater than the one in diameter. So we select- ed 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 supe- rior seedlings is 8.92 cm, it is more than the average of mm.it is more than the average 3.6%. overall 35.9% , and the mean volume of diameter is 3.48
super seedlingsgrowth differenceselection standardselectionPinus yunnanensis
NETL
NSTL
万方数据
维普
