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Nodulation and competitiveness of gusA-marked Bradyrhizobium japonicum A1017 in soybean |
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| Authors: | Ken-Ichi Yuhashi Kiwamu Minamisawa Yasuo Minakawa Dennis J Tobias Masatsugu Kubota Shoichiro Akao |
| Institution: | 1. School of Agriculture , Ibaraki University , Ami-machi, Inashiki-gun, Ibaraki , 300-O3 , Japan;2. National Institute of Agro-Biological Resources , Tsukuba , 305 , Japan |
| Abstract: | Attempts to improve the symbiotic nitrogen fixation with effective (Brady) rhizobium strains do not always succeed under field conditions due to the lower nodulation competitiveness of the introduced strains than that of the indigenous rhizobia (Triplett and Sadowsky 1992). An introduced strain needs to be marked for monitoring its nodule occupancy under competitive nodulation conditions. |
| Keywords: | Bradyrhizobium japonicum GUS transposon rhizobial competition soybean |