Origin of triploid <i>Arachis</i> by autopolyploidy The origins of the economically important tetraploids in Arachis (including peanut) have largely been studied; however, the polyploidization pathway through which they arose still remains unknown. Lavia et al. make a detailed cytogenetic analysis of the recent, spontaneously originated triploid cytotype of A. pintoi and find that this cytotype [...]