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@article{1210545, author = {ZozomováandLihová, Judita and Mandáková, Terezie and Kovaříková, Alena and Mühlhausen, Andreas and Mummenhoff, Klaus and Lysák, Martin and Kovařík, Aleš}, article_location = {Hoboken}, article_number = {4}, doi = {http://dx.doi.org/10.1111/nph.12873}, keywords = {NUCLEAR RIBOSOMAL DNA; RNA GENE SITES; CONCERTED EVOLUTION; TRAGOPOGON ASTERACEAE; NATURAL-POPULATIONS; SENECIO-CAMBRENSIS; MOLECULAR EVIDENCE; BRASSICA-NAPUS; PARENTAL RDNA; GENOME}, language = {eng}, issn = {0028-646X}, journal = {New Phytologist}, title = {When fathers are instant losers: homogenization of rDNA loci in recently formed Cardamine X schulzii trigenomic allopolyploid}, url = {http://onlinelibrary.wiley.com/doi/10.1111/nph.12873/epdf}, volume = {203}, year = {2014} }
TY - JOUR ID - 1210545 AU - Zozomová-Lihová, Judita - Mandáková, Terezie - Kovaříková, Alena - Mühlhausen, Andreas - Mummenhoff, Klaus - Lysák, Martin - Kovařík, Aleš PY - 2014 TI - When fathers are instant losers: homogenization of rDNA loci in recently formed Cardamine X schulzii trigenomic allopolyploid JF - New Phytologist VL - 203 IS - 4 SP - 1096-1108 EP - 1096-1108 PB - WILEY-BLACKWELL SN - 0028646X KW - NUCLEAR RIBOSOMAL DNA KW - RNA GENE SITES KW - CONCERTED EVOLUTION KW - TRAGOPOGON ASTERACEAE KW - NATURAL-POPULATIONS KW - SENECIO-CAMBRENSIS KW - MOLECULAR EVIDENCE KW - BRASSICA-NAPUS KW - PARENTAL RDNA KW - GENOME UR - http://onlinelibrary.wiley.com/doi/10.1111/nph.12873/epdf L2 - http://onlinelibrary.wiley.com/doi/10.1111/nph.12873/epdf N2 - Recently formed allopolyploids represent an excellent system to study the impacts of hybridization and genomic duplication on genome structure and evolution. Here we explored the 35S rRNA genes (rDNA) in the Cardamine x schulzii allohexaploid that was formed by two subsequent hybridization events within the past c. 150 yr. The rDNA loci were analyzed by cloning, next generation sequencing (NGS), RT-PCR and FISH methods. The primary C. x insueta triploid hybrid derived from C. rivularis (female) and C. amara (male) had gene ratios highly skewed towards maternal sequences. Similarly, C. x schulzii, originating from the secondary hybridization event involving C. x insueta (female) and C. pratensis (male), showed a reduction in paternal rDNA homeologs despite an excess of chromosomes inherited from C. pratensis. We also identified novel rDNA loci in C. x schulzii, suggesting that lost loci might be slowly reinstalled by translocation (but not recombination) of genes from partner genomes. Prevalent clonal propagation of allopolyploids, C. x insueta and C. x schulzii, indicates that concerted evolution of rDNA may occur in the absence of extensive meiotic cycles. Adoption of NGS in rDNA variant analysis is highly informative for deciphering the evolutionary histories of allopolyploid species with ongoing homogenization processes. ER -
ZOZOMOVÁ-LIHOVÁ, Judita, Terezie MANDÁKOVÁ, Alena KOVAŘÍKOVÁ, Andreas MÜHLHAUSEN, Klaus MUMMENHOFF, Martin LYSÁK and Aleš KOVAŘÍK. When fathers are instant losers: homogenization of rDNA loci in recently formed Cardamine X schulzii trigenomic allopolyploid. \textit{New Phytologist}. Hoboken: WILEY-BLACKWELL, 2014, vol.~203, No~4, p.~1096-1108. ISSN~0028-646X. Available from: https://dx.doi.org/10.1111/nph.12873.
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