Genomic divergence shaped the genetic regulation of meiotic homologous recombination inBrassicaallopolyploids DOI Creative Commons
Alexandre Pelé, Matthieu Falque, Maryse Lodé-Taburel

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 15, 2024

Summary The tight regulation of meiotic recombination between homologs is disrupted in Brassica AAC allotriploids, a genomic configuration that may have facilitated the formation rapeseed ( napus L.) ∼7,500 years ago. Indeed, presence haploid C genome induces supernumerary crossovers homologous A chromosomes with dramatically reshaped distribution. However, genetic mechanisms driving this phenomenon and their divergence nascent established lineages remain unclear. To address these concerns, we generated hybrids carrying additional derived either from an lineage allotetraploid B. or its diploid progenitor oleracea . We then assessed variation across twelve populations by mapping male using Single Nucleotide Polymorphism markers evenly distributed sequenced genome. Our findings reveal C09 chromosome responsible for near pericentromeric regions. Interestingly, counterpart shows no significant effect on own, despite having similar content genes. showed influences crossover through inter-chromosomal epistatic interactions other specific chromosomes. These results provide new insights into emphasize role since allopolyploid

Language: Английский

Genomic divergence shaped the genetic regulation of meiotic homologous recombination inBrassicaallopolyploids DOI Creative Commons
Alexandre Pelé, Matthieu Falque, Maryse Lodé-Taburel

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 15, 2024

Summary The tight regulation of meiotic recombination between homologs is disrupted in Brassica AAC allotriploids, a genomic configuration that may have facilitated the formation rapeseed ( napus L.) ∼7,500 years ago. Indeed, presence haploid C genome induces supernumerary crossovers homologous A chromosomes with dramatically reshaped distribution. However, genetic mechanisms driving this phenomenon and their divergence nascent established lineages remain unclear. To address these concerns, we generated hybrids carrying additional derived either from an lineage allotetraploid B. or its diploid progenitor oleracea . We then assessed variation across twelve populations by mapping male using Single Nucleotide Polymorphism markers evenly distributed sequenced genome. Our findings reveal C09 chromosome responsible for near pericentromeric regions. Interestingly, counterpart shows no significant effect on own, despite having similar content genes. showed influences crossover through inter-chromosomal epistatic interactions other specific chromosomes. These results provide new insights into emphasize role since allopolyploid

Language: Английский

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