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Advancement of Pyramiding New Sclerotinia Stem Rot Resistance Genes from H. californicus and H. schweinitzii into Cultivated Sunflower
Interspecific hybridization of H. californicus and H. schweinitzii with HA 410 was conducted in 2006 based on the BC1F1s obtained in 2005. In total, 109 BC1F1 plants were grown in the greenhouse for backcrossing. Because of unbalanced chromosome numbers in the triploid BC1F1, the BC1F1 pollen fertility ranged from 2.45% to 4.63%, and seed set was very low. In total, 59 BC2F1 seeds were obtained from 136,220 pollinated florets. Based on these results, we are re-crossing the BC1F1 with HA 410 to produce more BC2F1 seeds to screen for stem rot resistance.
plant pathogenic fungi
Meeting held January 10-11, 2007, Fargo, ND.
Proceedings / Sunflower research workshop 2007, no. 29
Journal Articles, USDA Authors, Peer-Reviewed
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