Abstract: Two populations ( located at Sanhu town , Xingan co., Jiangxi province ) of Scilla scilloides polyploid complex were surveyed cytologically , and four cytotypes, BB, BBB, BBBB, and ABBB were observed among two hundred and sixty three individuals . BBBB and ABBB were new records in East Asian continent . Until now, nine of the 12 euploid cytotypes of this polyploid complex have been found in the East Asian continent , which suggests the continent is one of the important locations where the cytotypic differentiation of the complex takes place . The occurrence of ABBB and BBB, but not ABB and aneuploids maybe demonstrates the distribution range of BB have contracted on the continent and Korean peninsula, AABB populations of plants with subglobose bulb have degenerated on the continent since Tertiary , and the mixed populations of BB and AABB are the relicts of populations on the continent , Korean peninsula and Cheju island . The cytotype component similarity in these populations to that in populations on the Japanese archipelago may show some historical relations between them, but this fact is not able to manifest the hypothesis that this species on the Japanese islands is one of“prehistoric naturalized”plants introduced from China .

Key words: Scilla scilloides

摘要： 对来自江西省新干县三湖镇绵枣儿(Scilla scilloides) 多倍体复合体两个居群263 个植
株进行了细胞学调查, 发现4 个整倍体细胞型, 即BB、BBB、BBBB 和ABBB。其中BBBB 和
ABBB 为大陆上首次记录。至此在东亚大陆上已经发现该多倍体复合体12 个整倍体细胞型中
的9 个。这表明东亚大陆也是该复合体细胞型分化的重要地区之一。此地出现ABBB 和BBB,
而未出现ABB以及非整倍体可能是说明自第四纪以来BB 细胞型在大陆和朝鲜半岛的分布区
正在收缩; 大陆上AABB 已经接近消失; 而大陆、朝鲜半岛和济州岛( 韩国) 的BB 和AABB
混合居群只是残遗。大陆与日本列岛居群细胞型组成的相似性可能暗示着它们的某种历史关
系, 但是并不能支持日本分布的绵枣儿是从中国引入的“史前归化”植物。

关键词: 绵枣儿, 多倍体, 分布FONT