Name: Bradyrhizobium Jordan 1982

Category: Genus

Proposed as: gen. nov.

Etymology: Bra.dy.rhi.zo’bi.um. Gr. masc. adj. bradys, slow; N.L. neut. n. Rhizobium, a bacterial generic name; N.L. neut. n. Bradyrhizobium, the slow (growing) Rhizobium

Gender, pronunciation: neuter (stem: Bradyrhizobi-), bra-dy-r^hi-ZO-bi-um

Type species: Bradyrhizobium japonicum (Kirchner 1896) Jordan 1982

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Valid publication: Jordan DC. Transfer of Rhizobium japonicum Buchanan 1980 to Bradyrhizobium gen. nov., a genus of slow-growing, root nodule bacteria from leguminous plants. Int. J. Syst. Bacteriol. 1982; 32:136-139.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Agromonas Ohta and Hattori 1985	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the family Bradyrhizobiaceae Garrity et al. 2006. Publication: Garrity GM, Bell JA, Lilburn T. Family VII. Bradyrhizobiaceae fam. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria), Springer, New York, 2005, p. 438.
  • 🧕 Brenner et al. (2005) assigned this genus to the family Bradyrhizobiaceae Garrity et al. 2006. Publication: Garrity GM, Bell JA, Lilburn T. Family VII. Bradyrhizobiaceae fam. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. 2 (The Proteobacteria) part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria), Springer, New York, 2005, p. 438.
  • 🚋 The type species of this genus has alternatively been placed in the genus [Rhizobacterium]. Publication: Kirchner O. Die Wurzelknöllchen der Sojabohne. Beiträge zur Biologie der Pflanzen 1896; 7:213-224.
  • 🚋 The type species of this genus has alternatively been placed in the genus Rhizobium Frank 1889 (Approved Lists 1980). Publication: Buchanan RE. What names should be used for the organisms producing nodules on the roots of leguminous plants? Proceedings of the Iowa Academy of Science 1926; 33:81-90.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Brabyrhizobium"; "Bradirhizobium"; "Bradirhyzobium"; "Bradorhizobium"; "Bradryhizobium"; "Bradyhizobium"; "Bradymizobium"; "Bradyrbizobium"; "Bradyrhibium"; "Bradyrhizbium"; "Bradyrhizhobium"; "Bradyrhizoblum"; "Bradyrhizohium"; "Bradyrhyzobium"; "Bradyrizobium"; "Bradyrtiizobium"; "Bradyvhizobium"; "Brayrhizobium"; "Bredyrhizobium"; "Brpdyrhizobium"; "Brudyrhizobium"; "Bvadyrhizobium"; "Dyrhizobium". — 🤨 This taxon name is occasionally used in plural form as: "Bradyrhizobia".
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie PM, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of rhizobia and agrobacteria Minutes of the closed meeting, Granada, 4 September 2017. Int J Syst Evol Microbiol 2018; 68:3363-3368.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie P, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Rhizobia and Agrobacteria Minutes of the meeting by video conference, 11 July 2018. Int J Syst Evol Microbiol 2019; 69:1835-1840.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie P, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Rhizobia and Agrobacteria Minutes of the closed meeting by videoconference, 17 July 2019. Int J Syst Evol Microbiol 2020; 70:3563-3571.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie P, Martinez-Romero E. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Agrobacterium and Rhizobium Minutes of the meeting, 7 September 2014, Tenerife, Spain. Int J Syst Evol Microbiol 2017; 67:516-520.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie PM, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee for the Taxonomy of Rhizobium and Agrobacterium Minutes of the meeting, Budapest, 25 August 2016. Int J Syst Evol Microbiol 2017; 67:2485-2494.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Lindstrom K, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Agrobacterium and Rhizobium: minutes of the meeting, 7 September 2010, Geneva, Switzerland. Int J Syst Evol Microbiol 2011; 61:3089-3093.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Mousavi SA, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Rhizobia and Agrobacteria. Minutes of the closed annual meeting: videoconference on 11 October 2022 followed by online discussion until 31 December 2022. Int J Syst Evol Microbiol 2023; 73:5856.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Mousavi SA, Young JPW. International Committee on Systematics of Prokaryotes, Subcommittee on the taxonomy of Rhizobia and Agrobacteria, minutes of the annual meeting by videoconference, 5 July 2021, followed by online discussion until 31 December 2021. Int J Syst Evol Microbiol 2022; 72:5453.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Mousavi SA, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Rhizobia and Agrobacteria: Minutes of the closed annual meeting, videoconference on 2 October 2023, followed by online discussion until 31 December 2023. Int J Syst Evol Microbiol 2024; 74:6276.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Mousavi SA, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Rhizobia and Agrobacteria: minutes of the 2024 closed annual meeting. Int J Syst Evol Microbiol 2025; 75:6680.
  • 💁 Taxonomists who have recently focused on this group are the corresponding authors of Bromfield and Cloutier (2021), Li et al. (2019), Bromfield and Cloutier (2024), Klepa et al. (2022), Silva et al. (2014). Editors in search of reviewers are advised to consider additional criteria such as whether a taxon is covered by one of the ICSP subcommittees.
  • 🧬 The phylogenomic assignment score of this taxon is 0.15744 (N = 36).
  • 🎰 The BRCs most frequently used for deposits in this group are: LMG: 73; HAMBI: 30; DSM: 19; CNPSo: 19; CECT: 15; BR: 11; CGMCC: 10; NBRC: 8; JCM: 8; ATCC: 7.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🧍 Pittman et al. (1991) suggested the abbreviation "BDRZ" for this genus name but this does not appear to be of practical relevance any longer. Publication: Pittman KF, Walczak CA, Lock CM. Codes and abbreviations for approved of effectively published names of genera of bacteria published from January 1980 to December 1990. Int J Syst Bacteriol 1991; 41:571-579.

Subdivision:

Number of child taxa with a validly published and correct name: 75
Number of child taxa with a validly published name, including synonyms: 76
Total number of child taxa: 94

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Bradyrhizobium acaciae" Avontuur et al. 2022	not validly published	preferred name
    "Bradyrhizobium aeschynomenes" Sun et al. 2022	not validly published	preferred name
    Bradyrhizobium agreste Klepa et al. 2021	validly published under the ICNP	correct name
    Bradyrhizobium algeriense Ahnia et al. 2019	validly published under the ICNP	correct name
    "Bradyrhizobium altum" Avontuur et al. 2022	not validly published	preferred name
    Bradyrhizobium americanum Ramírez-Bahena et al. 2017	validly published under the ICNP	correct name
    Bradyrhizobium amphicarpaeae Bromfield et al. 2019	validly published under the ICNP	correct name
    Bradyrhizobium arachidis Wang et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium archetypum Helene et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium australafricanum Klepa et al. 2022	validly published under the ICNP	correct name
    Bradyrhizobium australiense Helene et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium barranii Bromfield et al. 2022	validly published under the ICNP	correct name
    Bradyrhizobium betae Rivas et al. 2004	validly published under the ICNP	correct name
    "Bradyrhizobium brasilense" Martins da Costa et al. 2017	not validly published	preferred name
    Bradyrhizobium cajani Araújo et al. 2017	validly published under the ICNP	correct name
    "Bradyrhizobium campsiandrae" Cabral Michel et al. 2021	not validly published	preferred name
    Bradyrhizobium canariense Vinuesa et al. 2005	validly published under the ICNP	correct name
    Bradyrhizobium cenepequi Klepa et al. 2022	validly published under the ICNP	correct name
    "Bradyrhizobium centrolobii" Michel et al. 2017	not validly published	preferred name
    Bradyrhizobium centrosemae Ramírez-Bahena et al. 2017	inaccurate spelling	misspelling
    Bradyrhizobium centrosematis corrig. Ramírez-Bahena et al. 2017	validly published under the ICNP	correct name
    Bradyrhizobium commune Lafay et al. 2023	validly published under the ICNP	correct name
    Bradyrhizobium cosmicum Wasai-Hara et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium cytisi Chahboune et al. 2011	validly published under the ICNP	correct name
    Bradyrhizobium daqingense Wang et al. 2013	validly published under the ICNP	correct name
    Bradyrhizobium denitrificans (Hirsch and Müller 1986) van Berkum et al. 2011	validly published under the ICNP	correct name
    Bradyrhizobium diazoefficiens Delamuta et al. 2013	validly published under the ICNP	correct name
    Bradyrhizobium diversitatis Klepa et al. 2021	validly published under the ICNP	correct name
    Bradyrhizobium elkanii Kuykendall et al. 1993	validly published under the ICNP	correct name
    Bradyrhizobium embrapense Delamuta et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium erythrophlei Yao et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium ferriligni Yao et al. 2015	validly published under the ICNP	correct name
    "Bradyrhizobium forestalis" Martins da Costa et al. 2018	not validly published	preferred name
    Bradyrhizobium frederickii de Oliveira Urquiaga et al. 2019	validly published under the ICNP	correct name
    Bradyrhizobium ganzhouense Lu et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium glycinis Klepa et al. 2021	validly published under the ICNP	correct name
    Bradyrhizobium guangdongense Li et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium guangxiense Li et al. 2015	validly published under the ICNP	correct name
    "Bradyrhizobium guangzhouense" Li et al. 2019	not validly published	preferred name
    Bradyrhizobium hereditatis Klepa et al. 2022	validly published under the ICNP	correct name
    Bradyrhizobium hipponense Rejili et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium huanghuaihaiense Zhang et al. 2012	validly published under the ICNP	correct name
    Bradyrhizobium icense Durán et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium ingae Da Silva et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium iriomotense Islam et al. 2010	validly published under the ICNP	correct name
    Bradyrhizobium ivorense Fossou et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium japonicum (Kirchner 1896) Jordan 1982	validly published under the ICNP	correct name
    Bradyrhizobium jicamae Ramírez-Bahena et al. 2009	validly published under the ICNP	correct name
    Bradyrhizobium kavangense Grönemeyer et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium lablabi Chang et al. 2011	validly published under the ICNP	correct name
    Bradyrhizobium liaoningense Xu et al. 1995	validly published under the ICNP	correct name
    Bradyrhizobium lupini Peix et al. 2015	validly published under the ICNP, illegitimate name	in need of a replacement
    "Bradyrhizobium macuxiense" Michel et al. 2017	not validly published	preferred name
    Bradyrhizobium manausense Silva et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium mercantei Helene et al. 2017	validly published under the ICNP	correct name
    Bradyrhizobium monzae Morel Revetria et al. 2025	validly published under the ICNP	correct name
    Bradyrhizobium murdochi Helene et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium namibiense Grönemeyer et al. 2017	validly published under the ICNP	correct name
    Bradyrhizobium nanningense Li et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium neotropicale Zilli et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium niftali Klepa et al. 2019	validly published under the ICNP	correct name
    Bradyrhizobium nitroreducens Jang et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium oligotrophicum (Ohta and Hattori 1985) Ramírez-Bahena et al. 2013	validly published under the ICNP	correct name
    Bradyrhizobium ontarionense Bromfield and Cloutier 2024	validly published under the ICNP	correct name
    "Bradyrhizobium oropedii" Avontuur et al. 2022	not validly published	preferred name
    Bradyrhizobium ottawaense Yu et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium pachyrhizi Ramírez-Bahena et al. 2009	validly published under the ICNP	correct name
    Bradyrhizobium paxllaeri Durán et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium prioriisuperbiae corrig. Prescott et al. 2024	validly published under the ICNP	correct name
    Bradyrhizobium prioritasuperba Prescott et al. 2024	inaccurate spelling	misspelling
    Bradyrhizobium quebecense Bromfield and Cloutier 2021	validly published under the ICNP	correct name
    Bradyrhizobium retamae Guerrouj et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium rifense Chahboune et al. 2014	validly published under the ICNP	correct name
    Bradyrhizobium ripae Bünger et al. 2018	validly published under the ICNP	correct name
    Bradyrhizobium roseum corrig. Zhang et al. 2024	validly published under the ICNP	correct name
    Bradyrhizobium roseus Zhang et al. 2024	inaccurate spelling	misspelling
    "Bradyrhizobium sacchari" de Matos et al. 2017	not validly published	preferred name
    Bradyrhizobium sediminis Jin et al. 2023	validly published under the ICNP	correct name
    Bradyrhizobium semiaridum Klepa et al. 2022	validly published under the ICNP	correct name
    Bradyrhizobium septentrionale Bromfield and Cloutier 2021	validly published under the ICNP	correct name
    Bradyrhizobium shewense Aserse et al. 2018	validly published under the ICNP	correct name
    Bradyrhizobium stylosanthis Delamuta et al. 2016	validly published under the ICNP	correct name
    Bradyrhizobium subterraneum Grönemeyer et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium symbiodeficiens Bromfield et al. 2020	validly published under the ICNP	correct name
    Bradyrhizobium tropiciagri Delamuta et al. 2015	validly published under the ICNP	correct name
    Bradyrhizobium tunisiense Hsouna et al. 2025	validly published under the ICNP	correct name
    "Bradyrhizobium uaiense" Cabral Michel et al. 2020	not validly published	preferred name
    "Bradyrhizobium valentinum" Durán et al. 2014	not validly published	preferred name
    Bradyrhizobium vignae Grönemeyer et al. 2016	validly published under the ICNP	correct name
    Bradyrhizobium viridifuturi Helene et al. 2015	validly published under the ICNP	correct name
    "Bradyrhizobium xenonodulans" Claassens et al. 2023	not validly published	preferred name
    Bradyrhizobium yuanmingense Yao et al. 2002	validly published under the ICNP	correct name
    "Bradyrhizobium zhanjiangense" Li et al. 2019	not validly published	preferred name
    Bradyrhizobium zhengyangense Zhang et al. 2023	validly published under the ICNP	correct name

Parent taxon: Nitrobacteraceae corrig. Buchanan 1917 (Approved Lists 1980)

Assigned by: Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468.

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Record number: 516981