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Genome Dominance in Allium Hybrids (A. cepa × A. roylei)
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SYSNO ASEP 0556974 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Genome Dominance in Allium Hybrids (A. cepa × A. roylei) Tvůrce(i) Kopecký, David (UEB-Q) RID, ORCID
Scholten, O. (NL)
Majka, Joanna (UEB-Q) ORCID
Burger-Meijer, K. (NL)
Duchoslav, M. (CZ)
Bartoš, Jan (UEB-Q) RID, ORCIDCelkový počet autorů 6 Číslo článku 854127 Zdroj.dok. Frontiers in Plant Science. - : Frontiers Research Foundation - ISSN 1664-462X
Roč. 13, MAR 10 (2022)Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova female meiosis ; genome stability ; homoeologous recombination ; homoploid ; interspecific hybridization ; meiotic drive ; onion Obor OECD Genetics and heredity (medical genetics to be 3) CEP GA20-10019S GA ČR - Grantová agentura ČR EF16_019/0000827 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UEB-Q - RVO:61389030 UT WOS 000776748500001 EID SCOPUS 85127410775 DOI 10.3389/fpls.2022.854127 Anotace 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. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2023 Elektronická adresa http://doi.org/10.3389/fpls.2022.854127
Počet záznamů: 1