ArticleAnnals of botany2015
When sexual meets apomict: genome size, ploidy level and reproductive mode variation of Sorbus aria s.l. and S. austriaca (Rosaceae) in Bosnia and Herzegovina.
Article in Annals of botany, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed.
- Spatial Distribution of Genetic, Ploidy, and Morphological Variation of the Edaphic Steno-EndemicPlants (Basel, Switzerland) · 2025Article
- Phytochemical Characterisation ofPlants (Basel, Switzerland) · 2025Article
- New estimates and synthesis of chromosome numbers, ploidy levels and genome size variation in Allium sect. Codonoprasum: advancing our understanding of the unresolved diversification and evolution of this section.Botanical studies · 2024Article
- Genome Size Variation inGenes · 2024Article
- Apomictic Mountain Whitebeam (Biology · 2023Article
- Reproduction Modes and Conservation Implications in Three PolyploidPlants (Basel, Switzerland) · 2023Article
- Variability of Reproduction Pathways in the Central-European Populations of Hawthorns with Emphasis on Triploids.Plants (Basel, Switzerland) · 2022Article
- Genome Size, Cytotype Diversity and Reproductive Mode Variation ofPlants (Basel, Switzerland) · 2021Article
- Genome size variation and karyotype diversity in eight taxa ofComparative cytogenetics · 2021Article
- Reproductive pathways in Hieracium s.s. (Asteraceae): strict sexuality in diploids and apomixis in polyploids.Annals of botany · 2019Article
- Apomixis and Hybridization Drives Reticulate Evolution and Phyletic Differentiation inFrontiers in plant science · 2018Article
- Origin and genetic differentiation of pink-flowered Sorbus hybrids in the Western Carpathians.Annals of botany · 2017Article
- Breeding system and spatial isolation from congeners strongly constrain seed set in an insect-pollinated apomictic tree: Sorbus subcuneata (Rosaceae).Scientific reports · 2017Article
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7 authors.
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Abstract
BACKGROUND AND
aimsAllopolyploidy and intraspecific heteroploid crosses are associated, in certain groups, with changes in the mating system. The genus Sorbus represents an appropriate model to study the relationships between ploidy and reproductive mode variations. Diploid S. aria and tetraploid apomictic S. austriaca were screened for ploidy and mating system variations within pure and sympatric populations in order to gain insights into their putative causalities.
methodsFlow cytometry was used to assess genome size and ploidy level among 380 S. aria s.l. and S. austriaca individuals from Bosnia and Herzegovina, with 303 single-seed flow cytometric seed screenings being performed to identify their mating system. Pollen viability and seed set were also determined. KEY
resultsFlow cytometry confirmed the presence of di-, tri- and tetraploid cytotype mixtures in mixed-ploidy populations of S. aria and S. austriaca. No ploidy variation was detected in single-species populations. Diploid S. aria mother plants always produced sexually originated seeds, whereas tetraploid S. austriaca as well as triploid S. aria were obligate apomicts. Tetraploid S. aria preserved sexuality in a low portion of plants. A tendency towards a balanced 2m : 1p parental genome contribution to the endosperm was shared by diploids and tetraploids, regardless of their sexual or asexual origin. In contrast, most triploids apparently tolerated endosperm imbalance.
conclusionsCoexistence of apomictic tetraploids and sexual diploids drives the production of novel polyploid cytotypes with predominantly apomictic reproductive modes. The data suggest that processes governing cytotype diversity and mating system variation in Sorbus from Bosnia and Herzegovina are probably parallel to those in other diversity hotspots of this genus. The results represent a solid contribution to knowledge of the reproduction of Sorbus and will inform future investigations of the molecular and genetic mechanisms involved in triggering and regulating cytotype diversity and alteration of reproductive modes.
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