杉木数量性状相关性的研究

Studies on the Correlation among Quantitative Characters of Cunninghamia lanceolata

研究表明:杉木种子性状间、发芽率与优良度、发芽率与发芽势为极显著相关,而优良度与千粒重为显著相关;千粒重与苗期、幼林的生长性状间的线性相关不显著;同一家系年重复与千粒重之间虽显著线性相关,其它性状相关则不显著;同一家系同年份,苗高、侧枝数有较高的空间重复性,而地径、顶芽数空间的重复性较差;相同家系,树高、胸径和材积生长在不同的地点表现出不同程度的相关系数。树高与胸径生长的相关系数γ值为0.6—0.7;相同家系在不同年份重复中,胸径生长相关显著。

The study showed that (1) there were extremely significant correla-tions between germination rate and excellent degree and between germinationrate and germination energy; (2) there was a significant correlation between ex-cellent degree and thousand grain weight: (3) the linear correlation between thou-sand grain weight and growth characters at the stage of seedling and young standwas not significant: (4) there was a significant linear correlation between the an-nual repeated trials of the same family and thousand grain weight, but not signifi-cant between them and other characters; (5) the seedling height and the numberof lateral shoots of the same family in the same year possessed higher space re-peatability while the space repeatability of the base diameter and the number ofterminal buds was lower: (6) correlation coefficients of the height, DBH and vol-ume of same families growing on different sites were varied and the.correlationcoefficient (r) between the height growth and DBH growth was 0.6--0.7; and(7) there were significant correlations among the DBH growth of same familiesin the repeated trials in different years.