不同群体马尾松核型分化式样

<正> 马尾松(Pinus massoniana Lamb.)是我国分布最广,数量最多的一个树种。近年来对马尾松核型做了不少研究,但结果不尽一致。究其原因:一是取材产地和方法不同,有从单株上取材,有从多株混合种子作试材;二是取材产地局限。马尾松分布南自广西南部,东至福建东北部,西到四川东部大相岭东坡,北达安徽大别山以南及陕西汉水流域以南,沿海长江中下游分布在海拔700米以下,在西部地区可达海拔1500米以上。在这样广

PATTERNS OF KARYOTYPE DIFFERENTIATION OF DIFFERENT POPULATION OF PINUS MASSONIANA

A comparative intraspecific analysis of karyotypes was performed on Pinus massoniana by examining the meristematic cell of root-tips. Seedling were categorized from sixteen different geographic locality of China. Karyotypes of Pinus massoniana apper three different types: type A; type B; type C. On the base of investigation of three types of P. massoniana karyotype, it is supposed that such structural alterations of karyotype reflects certain displacements in the protein metabolism appeared in the adaptaion of organisms to different envi-romental conditions. Differentiation of P. massoniana karyotype was developed from polytypic karyotypes to geographic races between population.