 Polyploidy is frequent in plants, some estimates suggesting that 30–80% of living plant species are polyploid, and many lineages show evidence of ancient polyploidy (paleopolyploidy) in their genomes.Huge explosions in angiosperm species diversity appear to have coincided with the timing of ancient genome duplications shared by many species.It has been established that 15% of angiosperm and 31% of fern speciation events are accompanied by ploidy increase.