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Polyploidy occurs frequently but is usually detrimental to survival; thus, few polyploids survive in the long term. Here, evidence linking the short-term evolutionary success of polyploids to environmental upheaval is reviewed and possible longer-term evolutionary benefits of polyploidy are discussed.
Cultivated peanut has a large, complex genome, so obtaining its entire sequence is challenging. De novo assemblies of two diploid ancestor genomes provide high-quality reference sequences for decoding allotetraploid peanut genomes, and will become valuable resources for breeding and evolutionary studies.