New Chromosome Counts in some Species of the Genus Artemisia L. (Asteraceae) from Iran

Abstract

Summary Chromosome counts of 6 populations of 4 species in the genus Artemisia from the family Asteraceae are reported. All taxa were collected from west provinces of Iran. Three species, Artemisia fragrance, A. spicigera and A. scoparia, were not accordance with previous counts. The most of studied taxa had the basic number xϭ9 with ploidy levels ranging from 2x to 8x, but A. incana had xϭ8. Both diploidy and triploidy were found for A. incana that can be regarded as the sign of new species generation. This is the first report for ploidy level 2nϭ8xϭ72 for A. spicigera.

New or rare data on chromosome numbers and karyomorphology of some taxa in the subgenusSeriphidium(Bess.) Rouy. (Artemisia, Asteraceae) in Turkey

“…Aneusomy is most frequent in polyploidy cytotypes and in plants with vegetative multiplication (Vallès et al 2011). In this study, B chromosomes and detailed Rabiei et al 2003, Saedi et al 2006, Atri et al 2009, Naseri et al 2009, Chehregani et al 2010, Dolatyari et al 2013 (the taxon has been represented as A. spigcigera in all references). Khatoon and Ali 1993, Dolatyari et al 2013, Jalilia et al 2013 (the taxon has been represented as A. sieberi in all references).…”

“…spicigera (2n = 2x = 18) The chromosome number of this taxon was found as 2n = 2x = 18 (Figure 1h). Six reports, all on Iranian material, have been published so far: 2n = 18, 36 (Saedi et al 2006); 2n = 36 (Rabiei et al 2003;Naseri et al 2009); 2n = 36, 72 (Atri et al 2009);2n = 18, 36, 45, 54, and 72 (Chehregani et al 2010) and 2n = 36 (Dolatyari et al 2013). However, the taxon has been evaluated at species level by all of these authors.…”

“…Moreover, polyploidy particularly seems to some extent frequent in var. spicigera, which forms a polyploidy series on Iranian material (Saedi et al 2006;Rabiei et al 2003;Atri et al 2009;Naseri et al 2009;Chehregani et al 2010).…”