杉木无性系结实系数变异的研究

A study on the variation of cone coefficient of Chinese fir clones

以杉木无性系结实系数为指标,评价杉木种子园无性系的结实能力,试图克服结实量指标的偏差因素,提高无性系再选择的准确性。研究结果表明,杉木无性系结实系数属高重复力指标,单株为0335～0611,无性系为0602～0825,为中上等遗传控制。无性系间CV为1528%～4324%,无性系内CV为767%～3375%,系间变异大于系内变异,结实系数可有效地应用于无性系再选择。

According to the cone coefficient of Chinese fir clones,the ability of the cone coefficient of Chinese fir clones was evaluated.It try to avoid the deviation of the cone index and improve the exact of the clones selection again.The results show the cone coefficient of Chinese fir clones belongs to the high repeat index.The single plants R is 0 335～0 661 and the clones R is 0 602～0 825,is above the average genetic control.The CV of clones with on another is 15 28%～43 24%.The CV of interior among the clone is 7 67%～33 75%.The cone coefficient may be applied to the clones selection again. Author’s address:Anhui Province Xiuning County Forestry Bureau,Anhui Xiuning 245400 China