四川大头茶地理种群种子大小变异及对萌发、幼苗特征的影响

研究了四川大头萘６个分布地，７个地理种群种子大小变异特征、种子萌发及幼苗发育特征。结果表明，种子大小地理变异，南方种群种子变异较大，北方种上对较小，云南文山的种子最大最重，广西阳塑最轻最小，且最重约为最轻的２～３倍，不同种群种子萌发率也存在差异。南方种子差异较大，北方种子差异较小，大种子普遍有较高萌发率。种子太小小对苗生长速率、苗高、生物量（鲜重）有明显影响。

The variation of seed sizes of Gordonia acuminata geographic populations and its effect on seed germination and seedling

The variation of seed sizes,seed germinations and seedling characteristics were studied in Gordonia acuminata geographic populations of six areas.The results show as flows:The variation of seed sizes of the southern populations is higher,and that of northern populations is lower.The seed from Wenshan in Yunnan Province is the largest and the seed from Yangshuo's in Guangxi Province is the smallest.The difference among southern populations is higher,and the large seed has higher germination than the small one.The difference among morthern populations is smaller,and the large seed also has higher germination than small seed.But the germinations from southern population seeds are lower than that of northern's.The seed sizes have dominant effect on the seedling growth,seedling height and weight.