A TEST ON GENETIC EFFECT OF ELEMENTARY SEED ORCHARD OF CHINESE FIR

The seven pairs of open-pollinated progenies of plus trees in individual plantations and of their relative clones in a seed orchard of Chinese fir have been tested. Four years after having been planted in the field, significant growth difference was found between progenies of both pollin resource types to the same female parent genotypes. The growth of all the progenies from the clones in the seed orchard have exceeded those from their plus trees in plantations,having an average gain of 9.1%(4.7%~14.1%) for height and 14.5%(9.9%~23%) for DBH. This result would verify the genetic improvement effect of elementary seed orchard of Chinese fir.