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Title: A RAPD MARKER FOR RESISTANCE TO LATE BLIGHT OF SOLANUM BULBOCASTANUM - POTATO SOMATIC HYBRIDS AND THEIR PROGENY

Author
item Helgeson, John
item Haberlach, Geraldine
item MCGRATH, J - UNIVERSITY OF WISCONSIN
item RAASCH, J - UNIVERSITY OF WISCONSIN
item NAESS, S - UNIVERSITY OF WISCONSIN
item WIELGUS, S - UNIVERSITY OF WISCONSIN

Submitted to: Potato Association of America Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 6/15/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: We have analyzed three backcross two (BC2) populations for resistance to late blight and for the association of a randomly amplified polymorphic DNA (RAPD) marker with resistance. The three test populations were derived from two different somatic hybrids between potato and Solanum bulbocastanum, a wild Mexican species. Each of the somatic hybrids was crossed with Katahdin to generate BC1 parents for the crosses. These progeny have been found to be highly resistant to late blight at Hancock, WI, in Toluca, Mexico, and at other test sites in North America. The BC1 progeny were crossed with three different potato breeding lines (Norland, Atlantic and A 8904-8). The first two crosses were made in Madison. The third was made by ARS geneticist Joe Pavek of Aberdeen, ID. Each population contained more than 50 individuals and segregated for resistance to late blight For this test we have used a new facility developed at the Biotron on the campus of the University of Wisconsin. In each population, this resistance was correlated with better than 95% probability with a RAPD marker keyed to chromosome 8 of Solanum bulbocastanum.