Comparison of initial growth of hypernodulation soybean [Glycine max] mutants, NOD1-3, NOD2-4 and NOD3-7, and their parent cv. Williams
2006
Ito, S.(Niigata Univ. (Japan)) | ; Ohtake, N. | ; Sueyoshi, K. | ; Ohyama, T.
Characteristics of the initial growth of hypernodulation soybean (Glycine max [L] Merr.) mutants isolated from cv. Williams, NOD1-3, NOD2-4 and NOD3-7 were compared with that of parent cv. Williams with or without inoculation of Bradyrhizobium japonicum at 7 or 8 days after sowing. Total dry weight of each hypernodulation mutant seedling was not significantly different from that of Williams seedling in uninoculation conditions. In inoculation condition, nodule number of the plants at day 8 after sowing was higher in the order NOD1-3 (56) NOD24 (33) NOD3-7 (19) Williams (17), but there is no significant difference between NOD3-7 and Williams. The plant dry weight was not different by hypernodulation trait at this stage. In uninoculation condition, root growih of NOD1-3 and NOD3-7 was faster than that of Williams. Stem length and dry weight of NOD3-7 were lower than those of other lines, so shoot growth of NOD3-7 might be different from others. Seedling growth of NOD24 was very similar with that of Williams, except nodule number. Therefore, NOD24 mutant line may be a best mutant of Williams to investigate autoregulation of nodulation.
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