Minority cytotypes in fragrant orchids

Minority cytotypes in fragrant orchids

Minority cyto­types in fra­grant orchids

Patterns of ploidy vari­ation can provide use­ful insights into the evol­u­tion­ary mech­an­isms that shape the dynam­ics of plant sys­tems show­ing ploidy diversity. Trávníček et al. exam­ine cyto­type vari­ation in fra­grant orch­ids, Gymnadenia spe­cies, at dif­fer­ent spa­tial scales, from transcon­tin­ental to intra-populational. They find that most Gymnadenia pop­u­la­tions exhibit con­sid­er­able cyto­gen­etic (and, to a lesser degree, taxo­nomic) het­ero­gen­eity. In con­trast to pre­vi­ously invest­ig­ated plant groups, Gymnadenia is unique in that it is the incid­ence of rare minor­ity cyto­types that largely drives intra-population ploidy vari­ation. The cyto­gen­etic struc­ture of Gymnadenia pop­u­la­tions is remark­ably dynamic and shaped by mul­tiple evol­u­tion­ary mech­an­isms, includ­ing both the ongo­ing pro­duc­tion of unre­duced gam­etes and het­eroploid hybridization.

Annals of Botany Office.

The Annals of Botany Office is based at the University of Leicester.

Pin It on Pinterest

Liked this?

Be the first to share this post with your friends!