Responses of white yam (Dioscorea rotundata) cultivars to inoculation with three viruses

• Published in: Plant pathology Vol. 53; no. 2; pp. 141 - 147
• Main Authors: Odu, B.O, Hughes, J.D, Asiedu, R, Ng, N.Q, Shoyinka, S.A, Oladiran, O.A
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Science Ltd 01.04.2004; Blackwell; Wiley Subscription Services, Inc
• Subjects: Badnavirus; Biological and medical sciences; Cucumber mosaic virus; Cucumovirus; cultivars; Dioscorea alata bacilliform virus; Dioscorea alata virus; Dioscorea bacilliform virus; Dioscorea rotundata; Fundamental and applied biological sciences. Psychology; genetic variation; PAS‐ELISA; Phytopathology. Animal pests. Plant and forest protection; plant response; plant viruses; Potyvirus; varietal resistance; yams; Nigeria; varietal resistance; Monocotyledones; Plant pathology; Plant pathogen; RNA virus; Dioscorea alata; PAS-ELISA; Dioscoreaceae; Virus; Resistance; Dioscorea rotundata; Dioscorea alata bacilli form virus; Dioscorea alata virus; Cucumber mosaic virus; Angiospermae; Bromoviridae; Cucumovirus; Spermatophyta; ELISA assay
• ISSN: 0032-0862; 1365-3059
• DOI: 10.1111/j.0032-0862.2004.00997.x

The responses of 24 white yam (Dioscorea rotundata) cultivars to mechanical and vector transmission with each of three viruses infecting yams were assessed through enzyme‐linked immunosorbent assay (ELISA) and symptom development. The viruses were Dioscorea alata virus (DAV), genus Potyvirus; Dioscorea alata bacilliform virus (DaBV), genus Badnavirus; and Cucumber mosaic virus (CMV), genus Cucumovirus. Only TDr 95‐128, a landrace cultivar from Nigeria, developed symptoms of infection with CMV and DaBV following mechanical and vector transmission, respectively. PAS‐ELISA showed that nine genotypes remained uninfected by DAV and 11 were uninfected by CMV or DaBV. Genotypes TDr 747 and TDr 1640 both showed resistance to all three viruses.