Karyomorphological Analysis on Several Diploid Populations of Achillea biebersteinii Afan. (Asteraceae) from Iran

摘要: Comparative karyotype analysis of related species and populations has been used to describe patterns chromosomal evolution within a group. In order investigate cytogenetic variation in Achillea biebresteinii, root meristem zone nine were removed prepared using squash method. Image system Micro-measure software implanted providing parameter measurements. Although all the have diploid chromosome number (2n = 18) haploid (x = 9), but they could be differentiated by their formula quantitative parameters karyotypes. Phenetic distance principal component showed that classified four clusters (groups). The mean length ranged from 3.82 (±0.48) 7.77 (±0.12) µm. types detected as mostly metacentric (m) submetacentric (sm), showing 18m (two populations), 16m + 2sm (five 14m + 4sm (one population) 2M + 14m + 2sm population). karyotypes are almost similar. According Stebbins’, symmetric classes 1A 2A.