不同种源红锥优树子代苗期生长变异分析

Growth variation analysis of progeny seedlings of provenances of different Castanopsis hystrix elite trees

对3个不同种源的13株红锥优树子代进行苗期生长对比试验.结果表明：广西种源千粒重最大、达到968.64 g,其次为广东和福建种源.种子长及种子宽在种源间的表现与千粒重规律相同.不同种源千粒重、地径、苗高差异显著.播种到首次出芽时间在25～34 d,出芽累计天数在62～76 d.首次出芽时间以广西种源最早,且广西种源子代苗期生长最快,地径、苗高分别达到0.35、24.04 cm.最优种源的地径、苗高分别是最差种源地径、苗高的1.12、1.17倍.相关性分析结果显示,千粒重与地径、苗高存在显著正相关关系.

The growth traits of progeny seedlings of 13 Castanopsis hystrixr elite trees, from three different provenances were compared. The results showed that Guangxi provenance had the largest thousand-grain weight with 968.64 g, and followed by Guangdong and Fujian provenances. The seed length and seed width of the three provenances showed the same rule as thousand-grain weight. The differences in thousand-grain weight, ground diameter and seedling height of different provenances were significant. It took 25-34 d from sowing to germination, and the cumulative days of budding were 62-76 d. The earliest time of budding was Guangxi provenance, and the fastest growth of progeny seedlings was also appeared in Guangxi provenance, the ground diameter and seedling height were 0.35 cm, 24.04 cm, respectively. The ground diameter and seedling height of the best provenance were 1.12 times and 1.17 times of those of the worst provenance. The correlation analysis results showed that the thousand-grain weight had significant positive correlation with ground diameter and seedling height.