Inheritance of sethoxydim resistance in foxtail millet, Setaria italica (L.) Beauv. |
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Authors: | Tianyu Wang Henri Darmency |
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Institution: | (1) Present address: Laboratoire de Malherbologie, Institut National de la Recherche Agronomique, BV 1540, 21034 Dijon Cedex, France |
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Abstract: | Interspecific hybridization between foxtail millet cultivars (Setaria italica) and a green foxtail (S. viridis) resistant
to the herbicide sethoxydim were undertaken to breed foxtail millet for improved herbicide resistance. Parents, reciprocal
F1 hybrids, F2 selfed derived populations and BC1 backcross progeny were produced and analysed for mortality and fresh weight over a range of dosages. All resistant progeny
were 700 times more resistant than susceptible cultivars and was symptom free under current field dosages. Segregations of
resistant and susceptible progeny (3:1 in F2 and 1:1 in BC1) were not dependent upon dosage. Heterozygous individuals displayed the same magnitude of resistance as homozygous plants
at twelve times the recommended field dosage. Results suggested that sethoxydim resistance in foxtail millet was controlled
by a single, completely dominant, nuclear gene.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | foxtail millet herbicide resistance interspecific hybridization sethoxydim inheritance Setaria italica |
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