秦岭山地太白红杉种群种实性状的生态可塑性研究

研究了太白红杉6个种群中13个种实性状的变异情况.结果表明,太白红杉种实性状在种群内和种群间均存在广泛的变异,除种子宽和种鳞宽的差异在种群间不显著外,其它11个性状在种群间差异均极显著;种群间种鳞长、种鳞宽、球果长宽比、种翅长和种翅宽的变异程度比种群内大,其它8个性状在种群内的变异程度比种群间大.海拔对太白红杉种实性状的影响比较明显,其中种子宽、种鳞长、种翅宽、种鳞宽、球果长、球果宽和种鳞数与海拔呈负相关,种子宽和球果宽相关性显著,种鳞长、种翅宽、种鳞宽、球果长和种鳞数相关性极显著;坡度与种鳞长宽比呈负相关;年降水与球果宽呈正相关.种子长宽比和种翅长宽比与海拔呈负相关.

Ecological plasticity of Larix chinensis population cones and seeds in Qinglin Mountain

The study on 13 characters of cones and seeds of 6 Larix chinensis populations in Qinglin Mountain showed that there were significant differences in and among the populations.Except seed width and seed scale width,the other 11 characters were significantly different among populations.The variation coefficients of seed scale length,seed scale width,ratio of scale length to width,seed wing length,and seed wing width were larger among populations than in populations,while those of the other 8 characters were in adverse.Altitude had an obvious influence on the characters of cones and seeds,among which,seed width,scale width,scale length,seed wing length width,scale width,cone width,cone width,and the number of scales had a negative correlation with altitude,the ratio of scale length to width negatively correlated to slope,and scale width positively correlated to annual precipitation.The ratio of seed length to width and that of seed wing length to width showed a negative correlation to altitude.