title: Transfer of the Rsv3 locus from 'Harosoy' for resistance to soybean mosaic virus strains C and D in Japan.
abstract: Resistance to soybean mosaic virus (SMV) is imperative for soybean (Glycine max (L.) Merr.) production in the Tohoku region. Molecular markers for SMV resistance were previously reported for U.S. SMV strains, but they cannot be applied because of the differences in strain classification between Japan and the U.S. A U.S. variety 'Harosoy' has been used mainly as a donor of resistance to SMV strains C and D in a Japanese breeding program, resulting in resistant varieties such as 'Fukuibuki.' Because 'Harosoy' harbors the Rsv3 gene conferring resistance to the virulent SMV strain groups, G5 through G7, it appears that the Rsv3 gene confers resistance to strains C and D. In this study, we introduced resistance to the two strains from 'Fukuibuki' into a leading variety 'Ohsuzu' by recurrent backcrossing with marker-assisted selection. All lines selected with markers near Rsv3 showed resistance to the strains, suggesting that the Rsv3 locus is responsible for the resistance. Three years of trials showed that one of the breeding lines, 'Tohoku 169,' was equivalent to 'Ohsuzu' with respect to agricultural characteristics such as seed size, maturity date, and seed yield, except for the SMV resistance.
authors.affiliation: NARO Tohoku Agricultural Research Center , 297 Uenodai, Kariwano, Daisen, Akita 019-2112 , Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Kato
authors.affiliation: NARO Western Region Agricultural Research Center , 1-3-1 Senyuu, Zentsuji, Kagawa 765-8508 , Japan.
authors.forename: Yoshitake
authors.initials: Y
authors.lastname: Takada
authors.affiliation: NARO Tohoku Agricultural Research Center , 297 Uenodai, Kariwano, Daisen, Akita 019-2112 , Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shimamura
authors.affiliation: NARO Tohoku Agricultural Research Center , 297 Uenodai, Kariwano, Daisen, Akita 019-2112 , Japan.
authors.forename: Kaori
authors.initials: K
authors.lastname: Hirata
authors.affiliation: National Institute of Agrobiological Sciences , 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602 , Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sayama
authors.affiliation: National Institute of Agrobiological Sciences , 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602 , Japan.
authors.forename: Fumio
authors.initials: F
authors.lastname: Taguchi-Shiobara
authors.affiliation: National Institute of Agrobiological Sciences , 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602 , Japan.
authors.forename: Masao
authors.initials: M
authors.lastname: Ishimoto
authors.affiliation: NARO Tohoku Agricultural Research Center , 297 Uenodai, Kariwano, Daisen, Akita 019-2112 , Japan.
authors.forename: Akio
authors.initials: A
authors.lastname: Kikuchi
authors.affiliation: Graduate School of Agricultural Science, Tohoku University , 1-1 Tsutsumidori, Amamiyamachi, Aoba, Sendai, Miyagi 981-8555 , Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nishio
keywords: Glycine max; Rsv3; SMV strains; marker-assisted selection; soybean mosaic virus