Response of selected soybean (Glycine max [L.] Merr.) lines to cucumber mosaic virus disease in Minna, Niger State

Abstract

Response of twenty four soybean (Glycine max) lines to Cucumber mosaic virus was evaluated in Minna, Southern Guinea Savanna agro-ecology of Nigeria cropping season. The experiment which comprised as inoculated and uninoculated plants was laid out in a randomized complete block design (RCBD) with three replications. Seedlings were inoculated with CMV inoculum by sap transmission at seven days after sowing. Disease incidence and severity, growth and yield components were studied. Data were subjected to analysis of variance (ANOVA) and means separated with the Duncan Multiple Range Test (DMRT) and the least significant difference (LSD) at 5 % probability level. Disease incidence varied from 0 to 100 % at one week after inoculation (WAI) and 13.3 to 100 % at 2WAI. All the infected plants elicited leaf curling and chlorosis typical of cucumber mosaic virus disease. There was no reduction in 100-seed weight of the CMV-infected TGX 2004-3F compared with the control plants, whereas relatively low reduction values were observed in four genotypes namely, TGX 1989-65FN (1 %), TGX 2007-2F (1.7 %), TGX 1989-1FN (5 %), and TGX 1995-5FN (7.5 %). The five genotypes could be utilized in breeding programme for development of soybean CMV resistant varieties for the area.