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Genome duplication is the process by which additional copies of the entire genome are generated, due to nondisjunction during meiosis. The resulting cells and organisms are polyploid – they contain more than two homologous sets of chromosomes.
Genome assembly for many plant species can be challenging due to large size and high repeat content. Here, the authors use in vitro proximity ligation to assemble the genome of lettuce, revealing a family-specific triplication event and providing a comprehensive reference genome for a member of the Compositae.
By assembling the genome of Cardamine hirsuta and conducting comparative genomic and transcriptomic analyses, a study reveals the prevalent role of transcription factors and gene duplication in morphological evolution.
A study examining a genetic data set including dozens of genera containing crop
species and their wild relatives shows that domesticated species experienced
more polyploidy events than their wild relatives, and domestication followed