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United States Department of Agriculture

Agricultural Research Service

Title: Techniques to Transfer Germplasm from 2x(1ebn) Mexican Species to 2x(2ebn) Material Via Hybridization

item Hanneman Jr, Robert

Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: June 1, 1999
Publication Date: N/A

Technical Abstract: The 2x (l EBN) Mexican species are a rich genetic resource exhibiting extreme resistance to viruses, insects, fungi and nematodes. This group of species is unable to hybridize with other 2EBN diploid species and 2x (2EBN) Tuberosum haploids because of EBN. To use these species efficiently, means must be found to routinely create hybrids between 2x (lEBN) and 2x (2EBN) species and haploids. A hybrid has been created between a Tuberosum haplold and the Mexican species S. pinnatisectum using embryo rescue and second pollination techniques. Hybrids have atso been generated using S. verrucosum as a bridging species. In addition, the S. verrucosum -2x (IEBN) Mexican species hybrids have been successfully crossed with 2x (2EBN) S. phureia, S. chacoense and a Tuberosum haplold. An efficient and effective means has been found to open the 2x (lEBN) genepool to exploitation for potato improvement using common hybridization techniques coupled with knowledge of 2n gametes and Endosperm Balance Number (EBN).

Last Modified: 4/22/2015
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