Dating the origins of polyploidy events

摘要: is a widespread speciation mechanism, particularly in plants. Estimating the time of origin polyploid species important for understanding issues such as gene loss and changes regulation expression among homoeologous copies that coexist single genome owing to polyploidy. Polyploid can originate various ways; effects mode origin, genetic system, sampling on estimates age using distances between alleles polyploids their diploid progenitors, or loci genome, are explored. Even simplest cases, simulations confirm different expected give very date origin. The at least old estimated from comparison an allele sampled with most closely related progenitor. polyploidy literature often does not make clear longstanding observation divergence allopolyploid tracks species, polyploid. difficult, some circumstances impossible. Skepticism about dates origins clearly warranted.