The Potyviridae is the largest family of plant viruses, containing over 190 species divided among 10 genera. Members have filamentous particles and positive-sense single stranded RNA genomes. The largest and most agriculturally important genus is Potyvirus, which infects a wide range of plants and is transmitted by aphids. Other genera include Rymovirus and Tritimovirus which are transmitted by mites, and Bymovirus and Ipomovirus which have segmented genomes and are transmitted by fungi or whiteflies respectively. The family contains many viruses of agricultural importance.

2. POTYVIRIDAE
BY, UDAYENDU BARIK
M.Sc(Ag )Ist Yr
Admsn no. 18122L10
DEPARTMENT OF PLANT PATHOLOGY

3. POTYVIRIDAE
 The Potyviridae are a family of viruses that
encompasses more than 30% of known plant
viruses, many of which are of great agricultural
significance.
 Currently, more than 190 species are placed in this
family, divided among eight genera.
 The Potyviridae family is the largest of all plant
viruses families.

4. DIFFERENT GENERA OF FAMILY
 Based on the amino acid sequences of their
coat proteins, potyviridae is divided into ten
genera.
 Brambyvirus
 Bymovirus
 Ipomovirus
 Macluravirus
 Poacevirus
 Potyvirus
 Rymovirus
 Tritimovirus
 Roymovirus
 Brevemovirus

5. STRUCTURE
 They are nonenveloped, flexuous filamentous, rod-
shaped particles.
 The diameter is around 12–15 nm, with a length of
200–300 nm.
 Potyviridae genome is positive single stranded
RNA(+ ss RNA)

6. Genus Structure Capsid Genomic
arrange-
ment
Genomic
segmentation
Brambyvirus Filamentous Nonenveloped Linear Monopartite
Bymovirus Filamentous Nonenveloped Linear Segmented
Ipomovirus Filamentous Nonenveloped Linear Segmented
Macluravirus Filamentous Nonenveloped Linear Segmented
Poacevirus Filamentous Nonenveloped Linear Monopartite
Potyvirus Filamentous Nonenveloped Linear Monopartite
Rymovirus Filamentous Nonenveloped Linear Segmented
Tritimovirus Filamentous Nonenveloped Linear Segmented
Roymovirus Filamentous Nonenveloped Linear Monopartite
Brevemovirus Filamentous Nonenveloped Linear Segmented

7. BRAMBYVIRUS
 DISTINGUISHING FEATURES :-This is a monotypic
genus containing a single species Black berry virus
Y. Distinguished from all other members of the family
by having a very large P1 protein (83.6 k Da).

8. BYMOVIRUS
 DISTINGUISHING FEATURES :-Members of the genus
Bymovirus are distinct in having a divided (bipartite)
genome and in being transmitted by the root-infecting
parasite, Polymyxa graminis (Fungus).
LIST OF SPECISES :-
 Barley yellow mosaic virus
 Barley mild mosaic virus
 Oat mosaic virus
 Rice necrosis mosaic virus
 Wheat spindle streak mosaic virus
 Wheat yellow mosaic virus
BaYMV

9. IPOMOVIRUS
 DISTINGUISHING FEATURES :- Ipomoviruses are
distinguished from other genera by their mode of
transmission (whiteflies) and by phylogenetic
analyses.
LIST OF SPECISES :-
 Sweet potato mild mottle virus
 Cassava brown streak virus
 Cucumber vein yellowing virus
 Squash vein yellowing virus
SPMMV
SqVYV

10. MACLURAVIRUS
 DISTINGUISHING FEATURES :-Macluraviruses
resemble members of the genus Potyvirus in their
transmission by aphids but virions are slightly shorter.
They form a distinct group in phylogenetic analyses
and have different polyprotein consensus cleavage
sites.
LIST OF SPECISES :-
 Maclura mosaic virus
 Alpinia mosaic virus
 Cardamom mosaic virus
 Chinese yam necrotic mosaic virus
 Narcissus latent virus
 Ranunculus latent virus
MacMV

11.  DISTINGUISHING FEATURES :-The largest genus in
the family contains viruses(150+Species) transmitted
by aphids in a non-persistent manner.
 LIST OF SPECISES :-
 Potato virus Y
 Banana bract mosaic virus
 Bean common mosaic virus
 Lettuce mosaic virus
 Maize dwarf mosaic virus
 Papaya ringspot virus
 Sorghum mosaic virus
 Soybean mosaic virus
 Tobacco vein mottling virus
 Tulip mosaic virus and Many more……
PVY
POTYVIRUS

12. POACEVIRUS
 DISTINGUISHING FEATURES :- Poaceae plants serve
as the natural host. Currently only three species in this
genus, including the type species Triticum mosaic virus.
Triticum mosaic virus (TriMV) is transmitted by the wheat
curl mite.
 LIST OF SPECISES :-
 Triticum mosaic virus
 Sugarcane streak mosaic virus
 Caladenia virus A
TriMV
SCSMV

13. RYMOVIRUS
 DISTINGUISHING FEATURES :- Genus contains only
three viruses presumably transmitted by host-adapted
populations of eriophyid mite species in a semi-
persistent manner. The rymoviruses share a reciprocal
monophyletic relationship with species of the genus
Potyvirus.
 LIST OF SPECISES :-
 Ryegrass mosaic virus
 Agropyron mosaic virus
 Hordeum mosaic virus
RGMV
HoMV

14. TRITIMOVIRUS
 DISTINGUISHING FEATURES :- Tritimoviruses are
transmitted by mites (but different from those that
transmit rymoviruses). They form a distinctive
phylogenetic cluster.
LIST OF SPECISES :-
 Wheat streak mosaic virus
 Oat necrotic mottle virus
 Brome streak mosaic virus
 Wheat Eqlid mosaic virus
WSMV

15. ROYMOVIRUS
 DISTINGUISHING FEATURES :- Roymoviruses have
low nucleotide and amino acid identities with other
potyvirids.
 The nucleotide and deduced amino acid sequences of
the polyprotein share greatest identities with other
viruses in the family Potyviridae, but they are not clearly
closer to members of any particular genera in the family.
 LIST OF SPECISES :-Contain only one species
 Rose yellow mosaic virus RYMV

16. BREVEMOVIRUS
 DISTINGUISHING FEATURES :- Like macluraviruses,
members of the type species, Bellflower veinal mottle virus,
lack the P1 region of most potyvirids. Isolates of bellflower
veinal mottle virus share low (22–27%) nucleotide and
amino acid sequence identities to macluraviruses.
 The virus is probably not aphid transmitted.
 LIST OF SPECISES :-
 Bellflower veinal mottle virus
BVMoV

17. Unrooted phylogenetic tree based on the
codon-aligned nucleotide sequences of
the polyproteins of fully-sequenced
members of the family Potyviridae.
Poacevirus

18. Phylogenetic (distance) tree based on the codon-aligned nucleotide sequences of the
of the polyproteins of members of the family Potyviridae.

19. References :-
Adams, M.J., Antoniw, J.F. and Beaudoin, F. (2005). Overview and analysis of the polyprotein
cleavage sites in the family Potyviridae. Mol. Plant Pathol., 6, 471–487.
Adams, M.J., Antoniw, J.F. and Fauquet, C.M. (2005). Molecular criteria for genus and species
discrimination within the family Potyviridae. Arch. Virol., 150, 459–479.
Chung, B.Y.W., Miller, W.A., Atkins, J.F. and Firth, E.A. (2008). An overlapping essential gene in the
Potyviridae. Proc. Natl Acad. Sci., U S A, 105, 5897–5902.
French, R. and Stenger, D.C. (2005). Genome sequences of Agropyron mosaic virus and Hordeum
mosaic virus support reciprocal monophyly of the genera Potyvirus and Rymovirus in the family.
Potyviridae. Arch. Virol, 150, 299–312.
Gibbs, A. and Ohshima, K. (2010). Potyviruses and digital revolution. Annu. Rev. Phytopathol., 48,
10.1–10.19.
Kekarainen, T., Savilahti, H. and Valkonen, J.P.T. (2002). Functional genomics on Potato virus A: a
virus genome-wide map of sites essential for virus propagation. Genome Res., 12, 584–594.
ICTV(International committee on taxonomy of Viruses)
Research gate.com
Potyviridae –Wikipedia
J Gate plus
Science direct.com
Viral zone.expasy.org