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M6: A diploid potato inbred line for use in breeding and genetics research
- Jansky, S. H., Chung, Y. S., Kittipadukal, P.
- Journal of plant registrations 2014
- Solanum chacoense, Verticillium wilt, agronomic traits, crossing, diploidy, dry matter content, genes, germplasm, inbred lines, potatoes, seeds, self-pollination, single nucleotide polymorphism, soft-rot fungi, tubers
- M6 is a vigorous, homozygous breeding line derived by self-pollinating the diploid wild potato relative Solanum chacoense for seven generations. While most wild Solanum species are self-incompatible, this clone is homozygous for the dominant self-incompatibility inhibitor gene Sli. It is homozygous for 90% of SNP markers in the Infinium Array developed by the SolCAP consortium. M6 is vigorous and both male and female fertile, producing seeds in crosses to diploid cultivated and wild potato germplasm. These traits enable us to systematically develop diploid inbred lines, which was not possible in potato breeding until the discovery of Sli. M6 produces tubers under both short and long photoperiods, unlike other wild potato relatives. In addition, M6 has several desirable agronomic traits including high dry matter content, acceptable chip quality, and resistance to soft rot and Verticillium wilt. M6 is being used to develop recombinant inbred line populations.