我国5种珍稀植物的染色体观察

THE CHROMOSOME OBSERVATION ON 5 SPECIES OF RARE PLANTS OF CHINA

摘要: 本文对5种珍稀植物做了染色体观察,其结果为:蒙古扁桃染色体数为2ⁿ=16;蝟石为2ⁿ=32;天目木兰为2ⁿ=38;光叶珙桐为2ⁿ=42;平贝母为2ⁿ=22。其中,天目木兰,光叶珙桐的染色体数目为首次报道。这5种植物均在《中国珍稀濒危保护植物名录》之中,这些染色体数的报道将对珍稀濒危植物的深入研究提供科学依据。

Abstract: The chromosome numbers of five species of precious rare and endangered plants are reported as follows:1. Amygdalus mongolia (Maxim) Yu 2ⁿ=16; 2. Kolkwitzia amabilis Graebe 2ⁿ=32; 3. Magnolia amena Cheng 2ⁿ=38; 4. Davidia involucrata var. vilmoriniana (Dode) Wanger 2ⁿ=42; 5. Fritillaria ussuriensis Maxim 2ⁿ=22. Among them, chromosome numbers of M. amena, D. involcrata var. vilmoriniana are reported here for the first time. They are important genetic resources of China. The results will provide cytological information for their conservation, utilization and development.