, Volume 178, Issue 2, pp 273–281 | Cite as

Parental effects on the performance of cultivated × wild species hybrids in potato



Valuable genetic diversity in diploid wild Solanum species can be accessed through crosses to haploids (2n = 2×) of the tetraploid cultivated potato, Solanum tuberosum. Haploid-wild species hybrids segregate for the ability to tuberize in the field. In addition, they vary in male fertility, vine size, stolon length, and tuber size. In this study, three haploids were crossed with nine diploid wild Solanum species and 27 hybrid families were evaluated in the field for two years. The proportion of male fertile hybrid clones varied depending on the wild species parent. A large effect of the female parent was detected for vine size, stolon length, tuber size, percent tuberization, and percent plants selected for agronomic quality. An exceptional haploid (US-W4) was identified for the production of agronomically desirable haploid-wild species hybrids. In hybrids derived from US-W4, differences among wild species parents were observed for agronomic quality. Superior hybrids were produced by S. berthaultii and S. microdontum. Reciprocal crosses were evaluated for a subset of families. When the wild species was used as the female parent, male fertility was restored, but tuberization and tuber size were reduced. Careful selection of both haploid and wild species parents can result in a large proportion of fertile, agronomically desirable hybrid offspring.


Potato Solanum Wild species Germplasm enhancement Haploid 



The author thanks Andy Hamernik for assistance with evaluations of the HS populations. Wild species germplasm was provided by the NRSP-6 potato gene bank.


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© Springer Science+Business Media B.V. (outside the USA) 2010

Authors and Affiliations

  1. 1.USDA-ARS and Department of HorticultureUniversity of Wisconsin-MadisonMadisonUSA

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