[Karyotype Analysis of Different Populations of Tulipa edulis]

To explore the karyotype difference and to provide basis for genetic resources conservation and breeding of Tulipa edulis.

Karyological analysis on nine Tulipa edulis populations was carried out with conventional pressed slice method.

Nine Tulipa edulis populations investigated were diploid. Seven populations of Tulipa edulis were diploid with x = 12,and the chromosome numbers was 2n = 2x = 24. While the others were diploid with x = 24,and the chromosome numbers was 2n = 2x =48. Chromosome types of Tulipa edulis consisted of m,sm and st. The ratio of the longest chromosome to the shortest one ranged from1. 88 to 2. 34. Asymmetry coefficient ranged from 62. 99% to 71. 97%. Karyotype inclucled 2A,3A and 3B,in which 3B type was the most type and 2A type was observed for the first time in Tulipa edulis.

The karyological type varies with population of Tulipa edulis.