Genome Dominance in Allium Hybrids (A. cepa × A. roylei)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F22%3A00556974" target="_blank" >RIV/61389030:_____/22:00556974 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/22:73613543
Result on the web
<a href="http://doi.org/10.3389/fpls.2022.854127" target="_blank" >http://doi.org/10.3389/fpls.2022.854127</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3389/fpls.2022.854127" target="_blank" >10.3389/fpls.2022.854127</a>
Alternative languages
Result language
angličtina
Original language name
Genome Dominance in Allium Hybrids (A. cepa × A. roylei)
Original language description
Genome dominance is a phenomenon in wide hybrids when one of the parental genomes becomes “dominant,” while the other genome turns to be “submissive.” This dominance may express itself in several ways including homoeologous gene expression bias and modified epigenetic regulation. Moreover, some wide hybrids display unequal retention of parental chromosomes in successive generations. This may hamper employment of wide hybridization in practical breeding due to the potential elimination of introgressed segments from progeny. In onion breeding, Allium roylei (A. roylei) Stearn has been frequently used as a source of resistance to downy mildew for cultivars of bulb onion, Allium cepa (A. cepa) L. This study demonstrates that in A. cepa × A. roylei hybrids, chromosomes of A. cepa are frequently substituted by those of A. roylei and in just one generation, the genomic constitution shifts from 8 A. cepa + 8 A. roylei chromosomes in the F1 generation to the average of 6.7 A. cepa + 9.3 A. roylei chromosomes in the F2 generation. Screening of the backcross generation A. cepa × (A. cepa × A. roylei) revealed that this shift does not appear during male meiosis, which is perfectly regular and results with balanced segregation of parental chromosomes, which are equally transmitted to the next generation. This indicates that female meiotic drive is the key factor underlying A. roylei genome dominance. Single nucleotide polymorphism (SNP) genotyping further suggested that the drive has different strength across the genome, with some chromosome segments displaying Mendelian segregation, while others exhibiting statistically significant deviation from it.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10603 - Genetics and heredity (medical genetics to be 3)
Result continuities
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
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Frontiers in Plant Science
ISSN
1664-462X
e-ISSN
1664-462X
Volume of the periodical
13
Issue of the periodical within the volume
MAR 10
Country of publishing house
CH - SWITZERLAND
Number of pages
10
Pages from-to
854127
UT code for WoS article
000776748500001
EID of the result in the Scopus database
2-s2.0-85127410775