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- Title
Polyploidy and new chromosome counts in Pseudognaphalium Kirp. (Compositae: Gnaphalieae).
- Authors
Acosta-Maindo, Adriel; Hinojosa-Espinosa, Oscar; Galbany-Casals, Mercè
- Abstract
Pseudognaphalium Kirp. (Compositae: Gnaphalieae) comprises approximately 90 species and it has a worldwide but fragmented distribution. This study provides a total of 20 chromosome counts, nine of which are the first report for a species, and the rest are confirmation of previous reports. With the addition of these data to the previously published reports, the chromosome numbers for a total of 32 species of the genus Pseudognaphalium are now available. Considering all chromosome data available at present, c.22% of the species are diploids and c.78% are polyploids, mainly tetraploids. African and Asian species are predominantly diploid whereas the vast majority of the American species are tetraploid, suggesting that polyploidy played a key role in the colonization of the American continent by the genus Pseudognaphalium.
- Publication
Caryologia, 2018, Vol 71, Issue 4, p471
- ISSN
0008-7114
- Publication type
Article
- DOI
10.1080/00087114.2018.1503501