Abstract:

This paper reviewed the research progress on reproductive system of seed orchard and effect of flowering phenology, gamete production, cone and seed abortion, pollination mechanism and flowering distribution on genetic composition of seeds, discussed the relation among flowering phenology, cone production and gamete contribution. The differences of flowering phenology and polination mechanism for different parents limited gene communication between parents, the differences of cone production, abortion and spatial distribution resulted in change of gamete quantities from different parents, the both affected the genetic efficiency of reproductive system on seed orchard. The systematic and further researches must be conducted on reproductive system in order to increase the genetic quality and diversity of seeds on seed orchard.

Key words: Seed orchard, Flowering phenology, Gamete equilibrium, Abortion, Pollination mechanism, Cone distribution