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Inheritance of Reaction to Soybean Mosaic Virus in Soybeans 1
Author(s) -
Kiihl Romeu A. S.,
Hartwig E. E.
Publication year - 1979
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1979.0011183x001900030024x
Subject(s) - soybean mosaic virus , biology , inoculation , potyvirus , cultivar , virology , potyviridae , virus , plant virus , horticulture
Eight soybean [ Glycine max (L.) Merr.] cultivars previously identiifed as resistant to soybean mosaic virus (SMV) and three susceptible cultivars were used in a study to determine the inheritance of reaction to SMV. Field‐grown F 2 and F 3 populations were inoculated with virus strain SMV‐1. Greenhouse studies were also conducted in which the stock was inoculated and the reaction of homozygous and heterozygous scions determined. A variant of SMV‐1, designated SMV‐l‐B, was isolated and used to inoculate cultivars showing differential reactions to SMV‐1. Two types of resistance were recognized. The highest level of resistance gave complete protection against both SMV‐1 and SMV‐l‐B. The lesser level of resistance gave protection against SMV‐1 in the homozygous condition, but some of the heterozygous plants were necrotic. All homozygous plants became necrotic after inoculation with SMV‐l‐B. We proposed that the highest level of resistance be symbolized Rsv Rsv , the lesser level of resistance as rsv t rsv t , and the susceptible as rsv rsv . Rsv , rsv t , and rsv form an allelomorphic series with Rsv dominant to rsv t and rsv ; and rsv t dominant to rsv .