Publication Date
1985
Location
Kyoto Japan
Description
Difference in disease occurrence was observed in the reaction of seven varieties of alfalfa, Medicago sativa L., to southern blight, Corticium rolfsii, which is an important disease in warm region of Japan. The varieties were tested in space planted condition under inoculation in 1972 and 1973 in Aichi-ken Agricultural Research Center. The correlation coefficient in percentage of the dead plants between the first and the second test was 0.930**, and the varietal difference in analysis of variance for dead plant percentage was highly significant. Based on these results, breeding of resistant alfalfa to southern blight, was started from 1973, and selected strains were tested for their resistance in 1978 and 1984 to prove the effect of selection. Selected strains for one generation named as CRSY 52 group, were tested in 1978. CRSY 521-1 which was selected strongly for resistance to southern blight was the most resistant in Aichi and Kyushu. The selected strains for five generations were tested in the spaced planting condition in Aichi in 1984. CRSY 572-1, a synthetic with four component clones which had been selected for four generations was the most resistant. The heritability ��f southern blight resistance was high (69.6% ).
Citation
Inami, S; Kanbe, M; Fujimoto, F; Nakashima, K; and Suzuki, Shinji, "Breeding Alfalfa for Southern Blight Resistance" (1985). IGC Proceedings (1985-2023). 16.
(URL: https://uknowledge.uky.edu/igc/1985/ses2/16)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Breeding Alfalfa for Southern Blight Resistance
Kyoto Japan
Difference in disease occurrence was observed in the reaction of seven varieties of alfalfa, Medicago sativa L., to southern blight, Corticium rolfsii, which is an important disease in warm region of Japan. The varieties were tested in space planted condition under inoculation in 1972 and 1973 in Aichi-ken Agricultural Research Center. The correlation coefficient in percentage of the dead plants between the first and the second test was 0.930**, and the varietal difference in analysis of variance for dead plant percentage was highly significant. Based on these results, breeding of resistant alfalfa to southern blight, was started from 1973, and selected strains were tested for their resistance in 1978 and 1984 to prove the effect of selection. Selected strains for one generation named as CRSY 52 group, were tested in 1978. CRSY 521-1 which was selected strongly for resistance to southern blight was the most resistant in Aichi and Kyushu. The selected strains for five generations were tested in the spaced planting condition in Aichi in 1984. CRSY 572-1, a synthetic with four component clones which had been selected for four generations was the most resistant. The heritability ��f southern blight resistance was high (69.6% ).
