ArticleThe New phytologist2016
Structural polymorphisms and distinct genomic composition suggest recurrent origin and ongoing evolution of B chromosomes in the Prospero autumnale complex (Hyacinthaceae).
Article in The New phytologist, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Distribution of B chromosomes in Prospero autumnale associates with higher reproductive performance in southern Iberia.Genetica · 2026Article
- B chromosomes put the 'super' in supernumerary.Trends in genetics : TIG · 2026Review
- Dynamic meiotic behavior and evolutionary insights of supernumerary B chromosomes in the hangingflyComparative cytogenetics · 2025Article
- Karyotype Variability in WildPlants (Basel, Switzerland) · 2024Article
- Does the evolution of micromorphology accompany chromosomal changes on dysploid and polyploid levels in the Barnardia japonica complex (Hyacinthaceae)?BMC plant biology · 2023Article
- Euchromatic Supernumerary Chromosomal Segments-Remnants of Ongoing Karyotype Restructuring in theGenes · 2018Article
- B chromosomes are associated with redistribution of genetic recombination towards lower recombination chromosomal regions in perennial ryegrass.Journal of experimental botany · 2018Article
- Quantitative sequence characterization for repetitive DNA content in the supernumerary chromosome of the migratory locust.Chromosoma · 2018Article
- Multiple Origins and Nested Cycles of Hybridization Result in High Tetraploid Diversity in the MonocotFrontiers in plant science · 2018Article
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3 authors.
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Abstract
Supernumerary B chromosomes (Bs) are genomic parasitic components, originating from the A complement via chromosomal rearrangements, which follow their own evolutionary trajectories. They often contain repetitive DNAs, some shared with regular chromosomes and some newly evolved. Genomic composition, origin and evolution of Bs have been analysed in the chromosomally variable Prospero autumnale complex. Two rDNAs and a satellite DNA (PaB6) from regular chromosomes were mapped to Bs of 26 plants from three diploid cytotypes, their hybrids and polyploid derivatives. In homoploid diploid hybrids, genomic in situ hybridization (GISH) allowed B painting with the parental DNAs. Bs were structurally variable and highly enriched in 5S rDNA and satDNA PaB6, and rarely in 35S rDNA. Eleven combinations of rDNA and PaB6 localization were observed. The quantities of PaB6 in Bs and regular chromosomes were not correlated, suggesting amplification mechanisms other than recombination. PaB6 and 5S rDNA amounts increased with increasing ploidy level. GISH revealed two independent origins of Bs. The structural variation, repeat content, repeat-type fluctuations and differing genomic affinities of Bs in different cytotypes suggest that they represent young proto-B chromosomes. Bs in P. autumnale probably form recurrently as by-products of the extensive genome restructuring within this chromosomally variable species complex.
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