Iflaviridae
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The family Iflaviridae contains a single genus Iflavirus. The type species for the genus is Infectious flacherie virus (IFV).  

  Genus: Iflavirus
    Species: Deformed wing virus
      Deformed wing virus (DWV)
      Kakugo virus (KV)
    Species: Ectropis obliqua virus
      Ectropis obliqua virus (EoV)
    Species: Infectious flacherie virus (type species)
      Infectious flacherie virus (IFV)
    Species: Lygus lineolaris virus 1
      Lygus lineolaris virus 1 (LlV-1)
    Species: Nilaparvata lugens honeydew virus 1
      Nilaparvata lugens honeydew virus 1 (NlHV-1)
    Species: Perina nuda virus
      Perina nuda virus (PnV)
    Species: Sacbrood virus
      Sacbrood virus (SBV)
    Species: Slow bee paralysis virus
      Slow bee paralysis virus (SBPV)
    Species: Varroa destructor virus-1
      Varroa destructor virus 1 (VDV-1)
     
  Unassigned viruses
    Antheraea pernyi iflavirus
    Brevicoryne brassicae picorna-like virus
    Dinocampus coccinellae paralysis virus
    Halyomorpha halys virus
    Heliconius erato iflavirus
    Laodelphax striatellus picorna-like virus 2
    Nasonia vitripennis virus
    Spodoptera exigua iflavirus 1
    Spodoptera exigua iflavirus 2
    Venturia canescens picorna-like virus
     

It is clear from sequence comparisons (N.J. Knowles, unpublished observations) that 10 of these viruses can be divided into seven groups (species or genera?) which I have arbitrarily labelled A to G:

A) Infectious flacherie virus (IFV)

B) Sacbrood virus (SBV)

C) Perina nuda virus (PnV) and Evtropis oblique picorna-like virus (EoPV)

D) Deformed wing virus (DWV), Varroa destructor virus 1 (VDV-1) and Kakugo virus (KV)

E) Venturia canescens picorna-like virus (VcPLV)

F) Brevicoryne brassicae picorna-like virus (BBPLV)

G) (Honey) bee slow paralysis virus (BSPV)

Below is a N-J tree of the polymerase region (~500 aa). Each of the seven virus groups could represent a distinct genus.

 

Software: MEGA 3.1
No. of Taxa : 14
Data File : Iflaviridae_pol_2.meg
Data Title : Iflavirus partial pol
Data Type : Amino acid
Analysis : Phylogeny reconstruction
Tree Inference : ==============================
Method : Neighbor-Joining
Phylogeny Test and options : Bootstrap (1000 replicates; seed=64238)
Include Sites : ==============================
Gaps/Missing Data : Pairwise Deletion
Substitution Model : ==============================
Model : Amino: Poisson correction
Substitutions to Include : All
Pattern among Lineages : Same (Homogeneous)
Rates among sites : Uniform rates
No. of Sites : 544
No Of Bootstrap Reps = 1000

 

Table showing the percentage amino acid differences for the polymerase region depicted in the tree above.

 
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 IFV (AB000906) 0    
2 IFV (EF422865) 0.8 0  
3 IFV (EF422866) 0.8 0.4 0
4 SBV (AF092924) 74.5 74.5 74.5 0  
5 SBV (AF469603) 74.9 74.9 74.9 1.7 0
6 PnPV (AF323747) 78.8 78.8 78.8 73.6 73.8 0  
7 EoPV (AY341824) 79.2 78.8 78.8 72.7 72.9 6.9 0
8 DWV (AJ489744) 75.1 75.1 74.8 66.3 66.7 73.9 74.3 0      
9 DWV (AY292384) 75.2 75.2 74.9 66.5 66.9 74 74.4 0 0    
10 VDV (AY251269) 75.4 75.4 75.2 66.9 67.3 74.6 75.5 3.9 3.9 0  
11 KV (AB070959) 75.1 75.1 74.9 66.2 66.6 74.2 74.4 1.2 1.2 3.9 0
12 BBPLV (EF517277) 74.9 74.7 74.7 65.9 65.7 75.4 76.2 58.7 58.7 59.3 58.8 0
13 VcPLV (AY534885) 76.2 75.8 76 71.1 71.1 77.9 78.3 65.4 65.6 65.6 65.1 61.2 0
14 BSPV (EU035616) 74.9 74.7 74.5 70.8 71.2 74.1 74.7 60.8 60.7 61.1 60.5 65.2 70.1 0

 

Copyright 2005-2012 The Pirbright Institute, UK.