Interpopulation hybridization generates meiotically stable rDNA epigenetic variants in allotetraploid Tragopogon mirus

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F16%3A00457675" target="_blank" >RIV/68081707:_____/16:00457675 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1111/tpj.13110" target="_blank" >http://dx.doi.org/10.1111/tpj.13110</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/tpj.13110" target="_blank" >10.1111/tpj.13110</a>

Result language

angličtina

Original language name

Interpopulation hybridization generates meiotically stable rDNA epigenetic variants in allotetraploid Tragopogon mirus

Original language description

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-rDNAhomeolog 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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BO - Biophysics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plant Journal

ISSN

0960-7412

e-ISSN

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Volume of the periodical

85

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

362-377

UT code for WoS article

000369857400003

EID of the result in the Scopus database

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