Breeding of a New Green Soybean Cultivar with Tamba Black Soybean Genetic Background, ‘Murasakizukin 4 gou’

Abstract

‘Murasakizukin 4 gou’ was selected from the backcross progeny derived from a cross between the nonrecurrent parent ‘Tamadaikoku’ and recurrent parent ‘Shintanbaguro’. ‘Brown bloth symptom’, which is a major problem in ‘Shintanbaguro’, is not observed in ‘Murasakizukin 4 gou’ as it is resistance to the A strain of the soybean mosaic virus. Compared with ‘Shintanbaguro’, ‘Murasakizukin 4 gou’ has the same or slightly earlier flowering and harvesting times, a longer main stem, and greater pod yield per plant. Furthermore, the sucrose and amino acid contents in the seeds of ‘Murasakizukin 4 gou’ were higher than those of ‘Shintanbaguro’, and the eating quality evaluation of ‘Murasakizukin 4 gou’ was higher than that of ‘Shintanbaguro’.