Počet záznamů: 1
Interpopulation hybridization generates meiotically stable rDNA epigenetic variants in allotetraploid Tragopogon mirus
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SYSNO ASEP 0457675 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Interpopulation hybridization generates meiotically stable rDNA epigenetic variants in allotetraploid Tragopogon mirus Tvůrce(i) Matyášek, Roman (BFU-R) ORCID
Dobešová, Eva (BFU-R)
Húska, Dalibor (BFU-R)
Ježková, Ivana (BFU-R)
Soltis, P. S. (US)
Soltis, D.E. (US)
Kovařík, Aleš (BFU-R) RID, ORCIDCelkový počet autorů 7 Zdroj.dok. Plant Journal. - : Wiley - ISSN 0960-7412
Roč. 85, č. 3 (2016), s. 362-377Poč.str. 16 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova allopolyploid ; chromatin modification ; epigenetic variants Vědní obor RIV BO - Biofyzika CEP GA14-34632S GA ČR - Grantová agentura ČR GBP501/12/G090 GA ČR - Grantová agentura ČR GA13-10057S GA ČR - Grantová agentura ČR Institucionální podpora BFU-R - RVO:68081707 UT WOS 000369857400003 DOI 10.1111/tpj.13110 Anotace Uniparental silencing of 35S rRNA genes (rDNA), known as nucleolar dominance (ND), is common in interspecific hybrids. Allotetraploid Tragopogon mirus composed of Tragopogon dubius (d) and Tragopogon porrifolius (p) genomes shows highly variable ND. To examine the molecular basis of such variation, we studied the genetic and epigenetic features of rDNA homeologs in several lines derived from recently and independently formed natural populations. Inbred lines derived from T. mirus with a dominant d-rDNA homeolog transmitted this expression pattern over generations, which may explain why it is prevalent among natural populations. In contrast, lines derived from the p-rDNA dominant progenitor were meiotically unstable, frequently switching to co-dominance. Interpopulation crosses between progenitors displaying reciprocal ND resulted in d-rDNA dominance, indicating immediate suppression of p-homeologs in F-1 hybrids. Original p-rDNA dominance was not restored in later generations, even in those segregants that inherited the corresponding parental rDNA genotype, thus indicating the generation of additional p-rDNA and d-rDNA epigenetic variants. Pracoviště Biofyzikální ústav Kontakt Jana Poláková, polakova@ibp.cz, Tel.: 541 517 244 Rok sběru 2016
Počet záznamů: 1