论文部分内容阅读
在观察的31个无性系中丰产的约占20％,产量约占总产30％;中等的占60％弱,产量占54％;低产的占20％强,产量约占17％。结实的广义遗传力hw~2平均0.66。不同无性系在雌雄花比、雌花序结构、球果大小和分枝稠密度等方面存在差异。一般植株“偏雌性”、聚生雌花序占优势,球果大、树冠表面积大而分枝稠密的无性系结实量高;反之,“偏雄性”、单生雌花序为主、球果小、树冠表面积小而分枝稀疏的无性系结实量低。据72个无性系的分析,大粒种子无性系约占21％,中粒的约占47％,小粒的占32％;高发芽率无性系占23.6％,中发芽率的占57％,低发芽率的占19.4％。大粒种子无性系的发芽卒往往高于中、小粒种子无性系;而发芽势有相反趋势。
Among the 31 clones observed, about 20% were high yielding, and the yield was about 30% of the total yield. The moderate yield was 60%, the yield was 54%, the low yield was 20%, and the yield was about 17%. Strong generalized heritability hw ~ 2 average 0.66. Different clones in male and female flower ratio, female inflorescence structure, cone size and branch density differences exist. Generally plant “partial females”, polygamous female inflorescence dominant, large cones, crown surface area and dense branches clonal sturdy; the other hand, “partial male” single single female inflorescence, small cones, Clonal crown surface area is small and sparsely populated clones low yield. According to the analysis of 72 clones, the large seed clones accounted for about 21%, medium grain accounted for about 47%, small grains accounted for 32%; high germination rate of 23.6% of clones, the germination rate of 57%, low germination The rate of 19.4%. The germination of large-size seed clones tends to be higher than that of medium and small grain seed clones, while the germination potential has the opposite trend.