Title
Making Hybrids with the Wild Potato Solanum jamesii
Date Issued
01 June 2021
Access level
metadata only access
Resource Type
journal article
Author(s)
Bamberg J.
Kielar A.
Douches D.
University of Wisconsin
Publisher(s)
Springer
Abstract
Potato has about 100 related wild Solanum species growing naturally in the Americas. Solanum jamesii (jam), native to the southwest USA and Mexico, has many valuable traits for breeding, but making hybrids is extremely difficult. We investigated the approach of using the bridge species Solanum verrucosum (ver). A survey of all ver populations in the US Potato Genebank identified the best females. The standard bridge crossing technique using emasculation of ver and “mentor” double pollination after first pollinating with jam was very inefficient for most ver because: 1) emasculation depressed seedset in ver females, 2) despite very careful emasculation many accidental ver selfs resulted, and 3) mentor pollination produced many unwanted hybrids with the mentor pollen parent. We therefore produced populations of ver by backcrossing five generations into tuberosum cytoplasm. The BC5 lines are very vigorous in growth and flowering, but having very low male fertility and complete self-incompatibility they can be mass crossed with jam pollen without emasculation. Even with no mentor pollen, most pistils of verBC5 pollinated with jam produce a small fruit with an average of less than one normal seed. Resulting seedlings were confirmed ver-jam hybrids by DNA markers.
Start page
187
End page
193
Volume
98
Issue
3
Language
English
OCDE Knowledge area
Horticultura, Viticultura Agricultura
Scopus EID
2-s2.0-85105214557
Source
American Journal of Potato Research
ISSN of the container
1099209X
Sponsor(s)
We thank Mrs. Renee Sauer for help in making crosses and recording data, as well as the University of Wisconsin Peninsular Agricultural Research Station program and staff for their cooperation. The US Potato Genebank, like most other genebanks, keeps stocks that have all combinations of potential usefulness and accessibility. The extreme potential usefulness of S. jamesii made increasing its current low accessibility through improved crossing techniques an attractive target.
Sources of information: Directorio de Producción Científica Scopus