caa a22 4500 475794109 CHVBK 20180406123718.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/s001220051547 doi (NATIONALLICENCE)springer-10.1007/s001220051547 2n gametes in the potato: essential ingredients for breeding and germplasm transfer [Elektronische Daten] [D. Carputo, A. Barone, L. Frusciante] Abstract : 2n gametes are the result of meiotic mutations occurring during micro - and mega-sporogenesis. They have been identified in several plant species of different taxa. The potato is probably the crop plant where they have been most intensively studied and also more appropriately used for the genetic improvement of cultivated genotypes. This paper reviews how 2n gametes allow potato breeders to broaden the genetic basis of the cultivated Solanum tuberosum, introducing both new genes for the improvement of traits of interest and allelic diversity to maximize heterozygosity. We provide molecular and breeding evidence that, in the potato, 2n gametes represent a unique tool to transfer target genes from wild forms to the cultivated tetraploid gene pool. In fact, species directly crossable to S. tuberosum haploids can be exploited through sexual polyploidization crossing schemes. For those which have developed crossability barriers, specific crossing schemes based on ploidy bridges can be designed. In this paper we also give possible hypotheses to explain conflicting results on the genetic control and meiotic mutations responsible for 2n-gamete formation in the potato. Springer-Verlag Berlin Heidelberg, 2000 Keywords Solanum spp nationallicence Meiotic mutations nationallicence Genetic control nationallicence Resistance to stress nationallicence Ploidy bridges nationallicence Carputo D. Research Institute for Vegetable and Ornamental Plant Breeding, Via Università 133 80055 Portici, Italy e-mail: carputo@unina.it, IT aut Barone A. Research Institute for Vegetable and Ornamental Plant Breeding, Via Università 133 80055 Portici, Italy e-mail: carputo@unina.it, IT aut Frusciante L. Department of Agronomy and Plant Genetics, Via Università 100, 80055 Portici, Italy, IT aut https://doi.org/10.1007/s001220051547 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051547 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Carputo D. Research Institute for Vegetable and Ornamental Plant Breeding, Via Università 133 80055 Portici, Italy e-mail: carputo@unina.it, IT aut NATIONALLICENCE 700 1- Barone A. Research Institute for Vegetable and Ornamental Plant Breeding, Via Università 133 80055 Portici, Italy e-mail: carputo@unina.it, IT aut NATIONALLICENCE 700 1- Frusciante L. Department of Agronomy and Plant Genetics, Via Università 100, 80055 Portici, Italy, IT aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer