QTL analysis of seed-flooding tolerance in soybean (Glycine max [L.] Merr.).
In soybean (Glycine max [L.] Merr.), varieties with seed-flooding tolerance at the geminating stage are desirable for breeding in countries with much rainfall at sowing time. Our study revealed great intervarietal variation in seed-flooding tolerance as evaluated by germination rate (GR) and normal seedling rate (NS). Pigmented seed coat and small seed weight tended to give a positive effect on seed-flooding tolerance. Subsequently, QTL analysis of GR and NS were performed and a total of four QTLs were detected. Among them, Sft1 on the linkage group H (LG_H) exhibited a large effect on GR after a 24-h treatment; however, Sft2 near the I locus on LG_A2 involved in seed coat pigmentation exhibited the largest effect on seed-flooding tolerance. Sft1, Sft3 and Sft4 were independent of seed coat color and seed weight. Based on the results, we discussed the physiological effects of genetic factors responsible for seed-flooding tolerance in soybean.
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Takashi
T
Sayama
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Tetsuya
T
Nakazaki
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Goro
G
Ishikawa
Nagano Chushin Agricultural Experiment Station, Shiojiri, Nagano 399-6461, Japan.
Kazuhiro
K
Yagasaki
Nagano Chushin Agricultural Experiment Station, Shiojiri, Nagano 399-6461, Japan.
Naohiro
N
Yamada
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Naoko
N
Hirota
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Kaori
K
Hirata
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Takanori
T
Yoshikawa
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Hiroki
H
Saito
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Masayoshi
M
Teraishi
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Yutaka
Y
Okumoto
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Takuji
T
Tsukiyama
Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan. Electronic address: tanisaka@kais.kyoto-u.ac.jp.
Takatoshi
T
Tanisaka
Intervarietal variation; QTL analysis; Seed coat color; Seed weight; Seed-flooding tolerance; Soybean (Glycine max [L.] Merr.)