Loading...
Pre‐ and postzygotic mechanisms preventing hybridization in co‐occurring species of the Impatiens purpureoviolacea complex
Citations
Altmetric:
Advisors
Editors
Other Contributors
Affiliation
EPub Date
Issue Date
2021-11-24
Submitted Date
2021-04-05
Subject Terms
Albertine Rift
bird pollination
chromosome number
evolution
hybridization
insect pollination
polyploidization
bird pollination
chromosome number
evolution
hybridization
insect pollination
polyploidization
Collections
Research Projects
Organizational Units
Journal Issue
Other Titles
Abstract
In the species-rich genus Impatiens, few natural hybrids are known, even though closely related species often occur sympatrically. In this study, we aim to bridge the gap between micro- and macro-evolution to disentangle pre- and postzygotic mechanisms that may prevent hybridization in the Impatiens purpureoviolacea complex from Central Africa. We analyzed habitat types, species distribution, pollination syndromes, pollinator dependency, genome sizes, and chromosome numbers of seven out of the ten species of the complex as well as of one natural hybrid and reconstructed the ancestral chromosome numbers of the complex. Several species of the complex occur in sympatry or geographically very close to each other. All of them are characterized by pre- and/or postzygotic mechanisms potentially preventing hybridization. We found four independent polyploidization events within the complex. The only known natural hybrid always appears as single individual and is self-fertile. But the plants resulting from self-pollinated seeds often die shortly after first flowering. These results indicate that the investigated mechanisms in combination may effectively but not absolutely prevent hybridization in Impatiens and probably occur in other genera with sympatric species as well.
Citation
Abrahamczyk, S., Jandová, M., Líblová, Z., Janssens, S. B., Dostálek, T., Holstein, N., & Fischer, E. (2021). Pre- and postzygotic mechanisms preventing hybridization in co-occurring species of the Impatiens purpureoviolacea complex. Ecology and Evolution, 11, 17485– 17495. https://doi.org/10.1002/ece3.8382
Publisher
Journal
Research Unit
PubMed ID
PubMed Central ID
Embedded videos
Type
Journal Article
Item Description
Copyright © 2021, The Author(s). This is an open access article, available to all readers online, published under a creative commons licensing (https://creativecommons.org/licenses/by/4.0/).
NHM Repository
NHM Repository
Series/Report no.
ISSN
2045-7758
EISSN
2045-7758