caa a22 4500 465790410 CHVBK 20180323112022.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF02012097 doi (NATIONALLICENCE)springer-10.1007/BF02012097 Phenotypic drift in Bradyrhizobium japonicum populations after introduction into soils as established by numerical analysis [Elektronische Daten] [B. Brunel, J. Boeufgras, D. Bernillon, R. Bardin] The degree of phenotypic variation of the bacterial strains USDA 125-Sp, USDA 138 and USDA 138-SmBradyrhizobium japonicum a long time after introduction was studied in three experimental fields. A total of 54 phenotypic characters were analyzed by constructing a dendrogram based on an hierarchic classification. Strong similarities (92.6, 94 and 95%) were found between the isolates introduced into soil 8, 10 and 13 years ago and between their respectiveB. japonicum parental clones. The dendrogrammic analysis detected a small amount of phenotypic drift, however, between soil isolates and parental clones belonging to the same serogroup (selective effects were found to have generated 0 to 3.9% variation for the USDA 125-Sp inoculum introduced 8 years ago, and 3.2-3.5% after 10 and 13 years, respectively, for the USDA 138 and USDA 138-Sm bacterial inocula) and within the serogroup 125 soil isolates (2.7%). We found a similar evolution of serogroup 125 isolates when compared with parental clones conserved on slant agar at 4°C. When a drift was observed, the isolates from soil presented a lower activity for several enzymes and lower diversity compared with the parental clones. Springer-Verlag New York Inc., 1990 Brunel B. Laboratoire d'Ecologie Microbienne CNRS URA 697, Université Claude Bernard Lyon I, 43, Bd du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France aut Boeufgras J. Département d'Informatique Scientifique API SYSTEM La Balme Les Grottes, 38 390, Montalieu-Vercieu, France aut Bernillon D. Laboratoire d'Ecologie Microbienne CNRS URA 697, Université Claude Bernard Lyon I, 43, Bd du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France aut Bardin R. Laboratoire d'Ecologie Microbienne CNRS URA 697, Université Claude Bernard Lyon I, 43, Bd du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France aut Microbial Ecology Springer-Verlag 19/2(1990-03-01), 163-170 0095-3628 19:2<163 1990 19 248 https://doi.org/10.1007/BF02012097 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02012097 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Brunel B. Laboratoire d'Ecologie Microbienne CNRS URA 697, Université Claude Bernard Lyon I, 43, Bd du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France aut NATIONALLICENCE 700 1- Boeufgras J. Département d'Informatique Scientifique API SYSTEM La Balme Les Grottes, 38 390, Montalieu-Vercieu, France aut NATIONALLICENCE 700 1- Bernillon D. Laboratoire d'Ecologie Microbienne CNRS URA 697, Université Claude Bernard Lyon I, 43, Bd du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France aut NATIONALLICENCE 700 1- Bardin R. Laboratoire d'Ecologie Microbienne CNRS URA 697, Université Claude Bernard Lyon I, 43, Bd du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France aut NATIONALLICENCE 773 0- Microbial Ecology Springer-Verlag 19/2(1990-03-01), 163-170 0095-3628 19:2<163 1990 19 248 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer