Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas

Homoplastic versus xenoplastic evolution: exploring the emergence of key intrinsic and extrinsic traits in the montane genus Soldanella (Primulaceae)

“…Chorological and ecological observations indicate that the evolution of dysploid cytotype is primarily associated with forest environments and mid-altitudinal zones (Kochjarov a et al, 2017;Valachovi c et al, 2019;Zhang & Kadereit, 2002). Interestingly, this hypothesis contradicts the findings that the occurrence of meiotic abnormalities, which may result in the formation of aneuploid gametes necessary for dysploid cytotype evolution, is expected to be higher in colder and harsher environments (such as alpine zones and cold deserts) than in more climatically stable forest ecosystems (e.g., Tantray et al, 2021). Additionally, our recent study (Slov ak et al, 2023) indicates that species with dysploid cytotype have not been reproductively isolated from euploid populations (see also Mand akov a & Lysak, 2018;Melich arkov a et al, 2020;Winterfeld et al, 2018).…”