Physiological studies on grass-dwarf selection lines in wheat (Triticum aestivum L.) |
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Authors: | K Moore I R Cubitt |
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Institution: | (1) Department of Agricultural Biology, The University, Nel 7RU Newcastle upon Tyne, England;(2) Present address: Rothwell Plant Breeders Ltd., Rothwell, LN7 6BR Lincoln, England |
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Abstract: | Summary Low power heating wires insulated in a flexible plastic strip were used to heat the shoot meristematic region of grass-dwarf genotypes to a precise temperature. The results indicate that the shoot apical meristem is the region requiring 26°C for the initiation of reproductive development in these genotypes. A secondary effect of the reproductive growth induced by high temperature treatments, was a reduction in the high levels of peroxidase enzymes found in vegetative grass-dwarf plants. The heating wire provides a precise method to identify Type I, II and III grass-dwarf genotypes according to their temperature requirements, of 26°C, 21°C and 16°C respectively, for reproductive growth under the same temperature (16 C) and photoperiod (12 hours). |
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Keywords: | Triticum aestivum wheat hybrid grass clump dwarfness physiology |
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