A quinclorac sensitive lethality rice mutant: its discovery,genetics and potential application |
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Authors: | H Peng J Zhang Q Xie |
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Institution: | 1. Laboratory of Germplasm and Genetics, College of Life Science, Jianghan University, Wuhan 430056, China;2. Corresponding author, E‐mail: xiequ1965@163.com |
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Abstract: | In this study, we reported a quinclorac‐sensitive rice natural mutant M4017, derived from an indica restorer line 4017 of three‐line hybrid. The mutant could be killed at three‐leaf stage by quinclorac at 175 mg/l or higher, a dosage that is recommended for monocot herbs control. The mutant at flowering stages can also be effectively killed by quinclorac at 1.25–1.50 g/l or higher, which is safe for its F1 hybrids and all other normal varieties. Genetic analysis, using the F1, F2 and BC1 populations derived from this mutant and other often‐used varieties, revealed that quinclorac sensitivity/lethality was controlled by a single recessive gene, which was named quin1. This mutant has a potential application in false hybrid seed removal or mechanized production of hybrid seeds. |
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Keywords: | quinclorac sensitivity mutation seed production hybrid rice (Oryza sativa) |
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