| Genetic diversity of rhizobia associated with Glycyrrhiza uralensis fisch in eastern Inner Mongolia |
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| DOI：10.7606/j.issn.1000-7601.2025.01.13 |
| Key Words: rhizobia Glycyrrhiza uralensis genetic diversity eastern Inner Mongolia |
| Author Name | Affiliation | | GAO Mengzhe | College of Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | YUAN Xiaoxia | College of Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | YANG Bingjie | College of Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | SHEN Aolong | College of Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | LI Hua | College of Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | JI Zhaojun | College of Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China |
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| Abstract: |
| To investigate the microevolution of symbiotic rhizobia associated with Glycyrrhiza uralensis, the plant was cultivated aseptically in greenhouse to isolate rhizobia from the local soil. A total of 21 rhizobial strains were isolated and identified as Rhizobium leguminosarum, Rhizobium alamii, Rhizobium yanglingense, Rhizobium phaseoli, Bradyrhizobium yuanmingense, Rhizobium sp. I and Bradyrhizobium sp. II. And Rhizobium sp. I was the predominant group, followed by Bradyrhizobium sp. II based on the core gene recA sequences. The community structure was relatively simple, with low nucleotide diversity (π) observed (range: 0.00205~0.01791, mean: 0.010406). Genetic differentiation (Dxy) was high, with values ranging from 0.0688 to 0.1935 (mean: 0.1483).The gene flow index (Nm) exhibited low values (range: 0.02~17.10, mean: 3.048). In conclusion, the high genetic diversity and low frequency of gene exchange suggest that the rhizobia associated with G. uralensis in eastern Inner Mongolia exhibit strong genetic stability throughout their evolutionary history. |
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