1. Yield of Four Generations of Virus-tested Sweetpotato.
- Author
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La Bonte, D., Clark, C., Villordon, A., Cannon, J., Hoy, M., Sistrunk, M., Freeman, E., and Roberts, G.
- Subjects
SWEET potatoes ,IPOMOEA ,PLANT propagation ,PLANT viruses ,PHYTOPATHOGENIC microorganisms - Abstract
The yield of three generations of virus-tested plants of 'Beauregard' sweetpotato (Ipomoea batatas) was assessed in Louisiana over a 4-year period in 15 yield trials. Treatments included virus-infected foundation 'Beauregard', virus-tested 'Beauregard' mericlone, B-63 [generation 1 (G-l)], and three generations of B-63 (G-2, G-3 and G-4). Generations refer to the number of continuous years virus-tested plants are grown in the field. Use of G-2 virus-tested 'Beauregard' transplants increased yields of U.S. no. 1 grade roots by 16% in comparison with virus-infected, foundation 'Beauregard'. Total marketable yield was also higher (11%) using B-63 G-2 transplants in comparison to virus-infected, foundation 'Beauregard'. Use of B-63 (G-l), G-3 and G-4 generation transplants did not increase yields in any grade in comparison to virus-infected, foundation 'Beauregard' by planting plots amidst virus-infested sweetpotato fields. Generation one B-63 transplants were greenhouse grown and often appeared less robust after planting. Yet we were unable to show significant yield differences between greenhouse derived B-63 (G-1) and field-grown B-63 (G-l) in separate tests; other factors may be involved. [ABSTRACT FROM AUTHOR]
- Published
- 2004
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