Evolution of an Apomixis-Specific Allele Class in Supernumerary Chromatin of Apomictic Boechera

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F22%3A00129385" target="_blank" >RIV/00216224:14740/22:00129385 - isvavai.cz</a>

Result on the web

<a href="https://www.frontiersin.org/articles/10.3389/fpls.2022.890038/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fpls.2022.890038/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fpls.2022.890038" target="_blank" >10.3389/fpls.2022.890038</a>

Result language

angličtina

Original language name

Evolution of an Apomixis-Specific Allele Class in Supernumerary Chromatin of Apomictic Boechera

Original language description

Asexual reproduction through seeds in plants (i.e., apomixis) is a heritable trait, and apomixis- linked loci have been identified in multiple species. However, direct identification of genomic elements is typically hindered as apomixis-linked loci and are commonly found in recombination-suppressed and repetitive regions. Heterochromatinized elements, such as B chromosomes and other supernumerary chromosomal DNA fragments have long been known to be associated with asexuality in both plants and animals and are prime candidate regions for the evolution of multiple apomixis factors controlling the individual elements of apomixis. Here, we examined molecular evolution, gene regulation, and chromosomal location of a male apomeiosis factor (UPG2), a long noncoding RNA gene, in sexual and apomictic Boechera with and without male apomeiosis (i.e., balanced and unbalanced apomicts). We revealed the origin of the gene in the apomixis genome on an apomixis-specific, supernumerary heterochromatic Boechera chromosome (Boe1). The UPG2 is active in the tapetum at male meiosis. We found allele classes specific to apomictic and sexual Boechera accessions and a third class that shares the features of both and points to a convergent transition state. Sex alleles are found only in some of the sexual accessions and have higher nucleotide divergence and lower transcriptional activity compared to apo alleles. These data demonstrate selective pressure to maintain the function of UPG2 for unreduced pollen formation in apomicts as the occasional transmission of the allele from unbalanced apomicts into sexual organisms that lead to pseudogenization and functional decay of copies in sexual organisms.

Czech name

—

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

—

OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/GA21-06839S" target="_blank" >GA21-06839S: The origin and evolution of apomixis-related chromosomes in Boechera (Brassicaceae)</a><br>

Continuities

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

Publication year

2022

Confidentiality

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

Name of the periodical

Frontiers in Plant Science

ISSN

1664-462X

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

JUN

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

890038

UT code for WoS article

000811660800001

EID of the result in the Scopus database

2-s2.0-85132838718