福建省三尖杉种子形态变异研究

研究了福建省内几个三尖杉分布区之间三尖杉种子形态变异规律,结果表明,三尖杉种子的形态指标:长、宽、厚、种子大小(长×宽×厚)及种子单粒重存在极显著的产地差异.在发芽率与各性状的相关性方面,三尖杉种子长、宽、厚、长宽比、重、大小、比重等形态特征与种子发芽率有一定的正相关,特别是种子的单粒重、大小和比重与发芽率的相关系数都达到了显著或极显著水平,而长厚比和宽厚比与发芽率却成负相关,其中宽厚比与发芽率呈极显著的负相关.聚类结果表明,除来源于永泰的F9外,其余各地种子在D0.407处可以大致地分为两大类:来源于永泰黄溪和柘荣的三尖杉种子形态差异不明显,归为一类;来源于漳平的三尖杉种子与其它居群有明显的差异,归为一类.

Studies on the Variation of Seed Traits of Cephalotaxus fortunei in Fujian Province

Studied Cephalotaxus fortunei seed's variation regulation from the aspect of seed shape characters. The results showed that there was extreme sigmificant difference among the charactersts of the C. Fortunei seeds, including the length, the width, the thickness, the weight, and the side. On the correlation of seeds characters with germination percentage, there had certain positive correlation between C. Fortunei seeds germination percentage and it's length, width, thickness, the ratio of length to width, the single grain weight, proportion and side etc, and the latter three characters had significant or extreme significant correlation with germination percentage, but the ratio of seeds length to thickness and seeds width to thickness had significant of extreme significant negative correlation with germination percentage. Cluster analysis showed that all the tested seeds but F 9 source from YongTai, could be divided into two types at D 0.407, ie seeds characters had obvious difference and no distinct difference from other populations, the former source from Zhangping, and the latter origin from Yongtai Huangxi and Zherong.