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Advancement of Pyramiding New Sclerotinia Stem Rot Resistance Genes from H. californicus and H. schweinitzii into Cultivated Sunflower

Permanent URL:
http://handle.nal.usda.gov/10113/16680
File:
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Abstract:
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.
Author(s):
Feng, J. , Seiler, G.J. , Gulya, T.J. , Jan, C.C.
Subject(s):
cultivars , genetic resistance , genes , stem rot , plant pathogenic fungi , Sclerotinia , disease resistance , Helianthus annuus , interspecific hybridization , backcrossing , chromosome number , wild plants , greenhouse experimentation , progeny , seed set , florets , pollination
Format:
4 p.
Note:
Meeting held January 10-11, 2007, Fargo, ND.
Source:
Proceedings / Sunflower research workshop 2007, no. 29
Language:
English
Year:
2007
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.