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Title: FIELD PERFORMANCE OF MAIZE GROWN FROM FUSARIUM VERTICILLIOIDES-INOCULATED SEED

Author
item Yates, Ida
item Widstrom, Neil
item Bacon, Charles
item Glenn, Anthony - Tony
item SPARKS, DARRELL - HORT SCI., UGA, ATHENS
item JAWORSKI, A - BOTANY, U/GEORGIA, ATHENS
item Hinton, Dorothy

Submitted to: Mycopathologia
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/25/2004
Publication Date: 3/1/2004
Citation: Yates, I.E., Widstrom, N.W., Bacon, C.W., Glenn, A.E., Sparks, D., Jaworski, A.J., Hinton, D.M. 2004. Field performance of maize grown from fusarium verticillioides-inoculated seed. Mycopathologia. 159:65-73.

Interpretive Summary: Corn plants were analyzed for following growth from Fusarium verticillioides-inoculated seed in a three-year field study. At harvest, yield of plants grown from F. verticillioides-inoculated seed were equal to or greater than plants grown from non-inoculated seed. In comparisons between geneotypes, a dent cultivar was significantly higher than a sweet corn for the majority of the yield assessments During the growing season, vegetative growth was assessed by plant survival, stem diameter, plant height, leaf number, and dry weight measured on three dates at approximately one-month intervals following planting. Vegetative character comparisons most often were significantly different between the dent and sweet corn, but most often insignificant among plants of different seed inoculation status. Significant differences were not consistent across years, collection number, or character. In conclusion, F. verticillioides inoculations of seed did not have a deleterious effect on the ensuring yield of corn plants and infrequent negative effects on growth under field conditions existing in south Georgia during 1997, 1998, and 1999

Technical Abstract: Yield of ears and seeds at harvest and vegetative growth of corn plants during the season were analyzed for plants grown from Fusarium verticillioides-inoculated seed in a three-year field study. A sweet corn, Silver Queen, and an Aspergillus resistant dent population, GT- MAS:gk, were each inoculated with a non-pathogenic and a pathogenic isolate of F. verticillioides, RRC 374 and RRC PAT, respectively. At harvest, yield was measured by number of ears, ear dry weight with shucks removed, and seed dry weight for a total of 15 assessments over 3 years. Yield of plants grown from seed inoculated with F. verticillioides were equal to plants grown from non-inoculated seed for 13 assessments and significantly higher for 2. In comparisons between geneotypes, GT-MAS:gk was significantly higher than Silver Queen for 11 of the yield assessments and equal to Silver Queen for the other 4. During the growing season, vegetative growth was assessed by plant survival, stem diameter, plant height, leaf number, and dry weight measured on three dates at approximately one-month intervals following planting. Vegetative character comparisons most often were significantly different between corn genotypes, but most often insignificant among plants of different seed inoculation status. Significant differences were not consistent across years, collection number, or character. In conclusion, F. verticillioides inoculations of seed did not have a deleterious effect on the ensuring yield of corn plants and infrequent negative effects on growth under field conditions existing in south Georgia during 1997, 1998, and 1999.