2n gametes in the potato: essential ingredients for breeding and germplasm transfer

摘要: 2n gametes are the result of meiotic mutations occurring during micro – and mega-sporogenesis. They have been identified in several plant species different taxa. The potato is probably crop where they most intensively studied also more appropriately used for genetic improvement cultivated genotypes. This paper reviews how allow breeders to broaden basis Solanum tuberosum, introducing both new genes traits interest allelic diversity maximize heterozygosity. We provide molecular breeding evidence that, potato, represent a unique tool transfer target from wild forms tetraploid gene pool. In fact, directly crossable S. tuberosum haploids can be exploited through sexual polyploidization crossing schemes. For those which developed crossability barriers, specific schemes based on ploidy bridges designed. this we give possible hypotheses explain conflicting results control responsible 2n-gamete formation potato.