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Non‐cultivated grass hosts of yellow dwarf viruses in Ethiopia and their epidemiological consequences on cultivated cereals
Author(s) -
Bekele Berhanu,
Kumari Safaa,
Ahmed Seid,
Fininsa Chemeda,
Yusuf Abdurazak,
Abraham Adane
Publication year - 2018
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12666
Subject(s) - biology , barley yellow dwarf , agronomy , eragrostis , luteovirus , veterinary medicine , bromus , plant virus , virus , poaceae , virology , medicine
Abstract The yellow dwarf ( YD ) disease complex epidemics in cultivated cereals grown in a specific period of the year mainly depend on the presence of potential reservoir alternative hosts harbouring both the viruses and the vectors over the off‐season and serve as a source of inoculum in subsequent cropping season, further spread being supported by efficient aphid vectors. As such, an extensive and intensive exploration to generate base line information on the identity and prevalence of YD viruses [ barley yellow dwarf virus ( BYDV )‐ PAV , BYDV ‐ MAV and BYDV ‐ SGV ; cereal yellow dwarf virus ( CYDV )‐ RPV ; and maize yellow dwarf virus ( MYDV )‐ RMV ] on wild annual and perennial grasses and forage cereals alternative hosts was conducted consecutively during 2013–2015 main‐ and short‐rainy seasons in cereals growing belts of Ethiopia. Random sampling was employed to collect the samples that were tested by the tissue blot immunoassay ( TBIA ) to identify the YDV s associated with the hosts using a battery of virus‐specific polyclonal antibodies. Of 13,604 samples analysed, YDV s were detected in 392 (2.9%) samples, which consisted of various wild grasses, forage cereals and three cultivated crops. YDV s were identified from at least 26 grass species and forage cereals, some of them are new records, and some are previously documented hosts. To our knowledge, this is the first report of YDV infection of Andropogon abyssinicus (FresenR.Br. ex Fresen.) ( BYDV ‐ PAV ), Avena abyssinica Hochst ( BYDV ‐ PAV ) , Bromus pectinatus Thunb. ( BYDV ‐ PAV and BYDV ‐ MAV ), Eragrostis tef (Zuccagni) Trotter ( BYDV ‐ PAV ), Eragrostis sp. ( BYDV ‐ PAV ), Hyparrhenia anthistrioides Stapf. ( BYDV ‐ PAV ), Panicum coloratum L. ( BYDV ‐ PAV ) , Polypogon monspeliensis (L.) Desf. ( BYDV ‐ PAV ), Setaria pumila (Poir.) Roem & Schult ( BYDV ‐ PAV , BYDV ‐ SGV and MYDV ‐ RMV ), Setaria australiensis (Scribn. & Merrill) Vickery ( BYDV ‐ PAV , BYDV ‐ MAV and CYDV ‐ RPV ) and Snowdenia polystachya (Fresen.) Pilg ( BYDV ‐ PAV , BYDV ‐ MAV , BYDV ‐ SGV , CYDV ‐ RPV and MYDV ‐ RMV ).