Cytogenetic features of rRNA genes across land plants: analysis of the Plant rDNA database

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F17%3A00476649" target="_blank" >RIV/68081707:_____/17:00476649 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1111/tpj.13442" target="_blank" >http://dx.doi.org/10.1111/tpj.13442</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/tpj.13442" target="_blank" >10.1111/tpj.13442</a>

Result language

angličtina

Original language name

Cytogenetic features of rRNA genes across land plants: analysis of the Plant rDNA database

Original language description

The online resource http://www.plantrdnadatabase.com/ stores information on the number, chromosomal locations and structure of the 5S and 18S-5.8S-26S (35S) ribosomal DNAs (rDNA) in plants. This resource was exploited to study relationships between rDNA locus number, distribution, the occurrence of linked (L-type) and separated (S-type) 5S and 35S rDNA units, chromosome number, genome size and ploidy level. The analyses presented summarise current knowledge on rDNA locus numbers and distribution in plants. We analysed 2949 karyotypes, from 1791 species and 86 plant families, and performed ancestral character state reconstructions. The ancestral karyotype (2n = 16) has two terminal 35S sites and two interstitial 5S sites, while the median (2n = 24) presents four terminal 35S sites and three interstitial 5S sites. Whilst 86.57% of karyotypes show S-type organisation (ancestral condition), the L-type arrangement has arisen independently several times during plant evolution. A non-terminal position of 35S rDNA was found in about 25% of single-locus karyotypes, suggesting that terminal locations are not essential for functionality and expression. Single-locus karyotypes are very common, even in polyploids. In this regard, polyploidy is followed by subsequent locus loss. This results in a decrease in locus number per monoploid genome, forming part of the diploidisation process returning polyploids to a diploid-like state over time.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/GC16-02149J" target="_blank" >GC16-02149J: Polyploidy generates beauty – exploration of complex genomes of roses (Rosa L. sect. Caninae (DC.) Ser.)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

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

89

Issue of the periodical within the volume

5

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

1020-1030

UT code for WoS article

000395810800013

EID of the result in the Scopus database

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