Articles
VARIATION IN SUSCEPTIBILITY TO TOMATO SPOTTED WILT VIRUS AMONG ADVANCED BREEDING LINES OF PEANUT (ARACHIS HYPOGAEA)
Article number
431_35
Pages
402 – 410
Language
Abstract
Epidemics of spotted wilt, caused by tomato spotted wilt virus (TSWV) were monitored in more than 50 genotypes of peanut (Arachis hypogaea) during 1990–1995. Entries included cultivars and advanced breeding lines.
The cultivars Florunner (susceptible) and Southern Runner (moderately resistant) were used as standards in all tests.
The range of final incidence of spotted wilt among entries was 2.2–15.6% in 1990, 0.5–6.5% in 1991, 0.2–6.4% in 1992, 5.2–23.7% in 1993, 6.7–45.4% in 1994, and 21.1–87.6% in 1995. Breeding lines GA T-2741 (Georgia Browne), GA T-2846 (Georgia Green), UF 84x1B-9–1–1-, and UF 84x1A-7–2–1–1- had a final incidence of spotted wilt that was similar to that of Southern Runner in which they were tested.
The relative performances of most genotypes have been consistent across light and moderate levels of disease incidence.
Based on 6 years of evaluations, considerable variability in apparent resistance to TSWV exists among advanced breeding lines from programs in both Georgia and Florida.
Additional advanced breeding lines show potential for release.
These lines exhibited lower incidence of spotted wilt and lower disease severity ratings than Florunner in one or more field evaluations.
The cultivars Florunner (susceptible) and Southern Runner (moderately resistant) were used as standards in all tests.
The range of final incidence of spotted wilt among entries was 2.2–15.6% in 1990, 0.5–6.5% in 1991, 0.2–6.4% in 1992, 5.2–23.7% in 1993, 6.7–45.4% in 1994, and 21.1–87.6% in 1995. Breeding lines GA T-2741 (Georgia Browne), GA T-2846 (Georgia Green), UF 84x1B-9–1–1-, and UF 84x1A-7–2–1–1- had a final incidence of spotted wilt that was similar to that of Southern Runner in which they were tested.
The relative performances of most genotypes have been consistent across light and moderate levels of disease incidence.
Based on 6 years of evaluations, considerable variability in apparent resistance to TSWV exists among advanced breeding lines from programs in both Georgia and Florida.
Additional advanced breeding lines show potential for release.
These lines exhibited lower incidence of spotted wilt and lower disease severity ratings than Florunner in one or more field evaluations.
Authors
A.K. Culbreath, J.W. Todd, D.W. Gorbet, W.D. Branch, C.C. Holbrook, F.M. Shokes, J.W. Demski
Keywords
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