Abstract
We investigated stem lodging resistance and culm characteristics of 94 native and bred wheat cultivars in Japan for two years. The culm of 8 cultivars which did not lodged in either year was statistically longer than that of 29 cultivars which lodged in 1 year, and the culm of 29 cultivars was statistically longer than that of 57 cultivars which lodged in both years. Among the 57 cultivars in the group with 93.4 cm or longer culm, a negative correlation was observed between culm length and the days from heading to lodging, and in the group with a culm length shorter than 93.4 cm, a positive correlation was observed between the second moment of area of basal internode and the days from heading to lodging. Thus, it was suggested that in the cultivars with a culm length of 93.4 cm or longer, the taller cultivars lodged earlier, and in the cultivars with a culm length shorter than 93.4 cm, the cultivars with weaker basal internodes lodged earlier. Among 94 cultivars, there was a positive correlation between bending moment and second moment of area, and also between bending moment and lignin content of basal internode.
