樟子松无性系种子园种子生产及其苗木培育

樟子松种子园无性系间的花粉量、种子产量均存在着差异,这种差异,是由樟子松无性系本身的遗传基因决定的。种子园中,往往少数无性系控制着园内50%以上的花粉量和种子产量。由于部分无性系种子产量低,育苗、造林时这些家系容易丢失。为减少家系的丢失数量,育苗时,应改善圃地的环境条件,增加土壤肥力,加强除草等抚育措施,提高育苗水平。

Seed Breeding and Seedling-raising of Clonal Seed Orchards of Pinus sylvestris var.mongolica

Throughput of pollen, production of seeds among clonal seed orchards of Pinus sylvestris var. mongolica had differences. These differences were determined by genetiegene of Pinus sylvestris var. rnongolica clones themselves. Over 50% throughput of pollen, production of seeds of seed orchards were controlled by a few clones. Production of some clonally seeds were low, these lines were easy to be lost while planting. In order to decrease losing amount of line, we should improve the environment condition of nursery land, increase fertility and raise the level of seedling-raising.