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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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