Blueprint for phasing and assembling the genomes of heterozygous polyploids: Application to the octoploid genome of strawberry

Michael Hardigan, Mitchell Feldmann, Randi Famula, Michaela Vachev, Mary Madera, Philipp Zerbe, Kristin Mars, Paul Peluso, David Rank, Shujun Ou, Christopher Saski, Charlotte Acharya, Glenn Cole, Alan Yocca, Patrick Edger & Steven Knapp
The challenge of allelic diversity for assembling haplotypes is exemplified in polyploid genomes containing homoeologous chromosomes of identical ancestry, and significant homologous variation within their ancestral subgenomes. Cultivated strawberry (Fragaria × ananassa) and its progenitors are outbred octoploids in which up to eight homologous and homoeologous alleles are preserved. This introduces significant risk of haplotype collapse, switching, and chimeric fusions during assembly. Using third generation HiFi sequences from PacBio, we assembled the genome of the...
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