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Title: LATE BLIGHT AND EARLY BLIGHT RESISTANCE FROM SOMATIC HYBRIDS BETWEEN SOLANUM BULBOCASTANUM AND POTATO

Author
item Helgeson, John
item VAUGHN, JAMES - UNIVERSITY OF WISCONSIN
item STEVENSON, WALTER - UNIVERSITY OF WISCONSIN

Submitted to: Potato Association of America Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 7/24/1995
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: In the process of examining early blight resistance in progeny from somatic hybrids between potato and Solanum brevidens and S. bulbocastanum, we planted a plot at the Hancock Experiment Station in the summer of 1994 to compare the best lines from 3 previous year's evaluations. As usual, no fungicide was applied during the season. On July 19, the first indication of late blight were noted and by July 26, it was apparent that a full scale epidemic was in progress. Cultivars Atlantic, Castile, Norland, Russet Burbank, Ranger Russet and Snowden were too defoliated on August 9 to continue rating for disease. In contrast, 11 of the 17 lines derived from bulbocastanum + potato somatic hybrids showed good resistance. Less than 9% of the foliage of these lines was affected by late blight. Three of the late blight resistant lines also showed good resistance to early bligh (1% or less of the foliage was affected by early blight). These results indicate that field-effective resistances to both early blight and late blight can be obtained through somatic hybridization of potato with S. bulbocastanum. Multiple site tests of these materials are planned for 1995.