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Registration of F1024 Sugarbeet Germplasm with Resistance to Sugarbeet Root Maggot
F1024 (Reg. No. GP-272, PI 658654) sugarbeet (Beta vulgaris L.) germplasm with resistance to sugarbeet root maggot (Tetanops myopaeformis von Röder) was released by the USDA-ARS and the North Dakota Agricultural Experiment Station, North Dakota State University, Fargo, ND on 15 Dec. 2009. F1024 was selected from a population formed by crossing F1016, a germplasm line resistant to root maggot, with a breeding line resistant to Cercospora leaf spot (CLS; caused by Cercospora beticola Sacc.). The population was subjected to three cycles of mass selection for resistance to root maggot followed by three cycles of selection among half-sib families. Under natural root maggot infestations, F1024 had a damage rating of 2.1 (on a scale of 1 to 9, where 0 = no maggot feeding, and 9 = >75% of root surface with feeding scars), compared with an average of 6.1 for two susceptible commercial hybrids. In a 2009 CLS evaluation, F1024 had a significantly lower disease rating than the susceptible check, and the difference between F1024 and the resistant checks was not significant. The performance of testcross hybrids between the component half-sib families of F1024 and a susceptible cytoplasmic-male-sterile line provided additional validation of the potential of root maggot–resistant hybrids in areas where root maggot is a perpetual threat.
plant genetic resources
fungal diseases of plants
Journal of plant registrations 2011 May, v. 5, no. 2
Journal Articles, USDA Authors, Peer-Reviewed
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