Cover

抄録

On the cover

In soybean, chilling temperatures negatively affect seed appearance by causing seed coat discoloration around the hilum region, which is called cold-induced discoloration (CD). The Ic marker, the DNA marker associated with CD tolerance, has been developed under phytotron conditions. In this issue, we assessed the effect of the Ic marker on CD tolerance under a cool field environment (main photo). The average pigment index of the cultivar ‘Toyomizuki’ (I allele, upper first left panel) was significantly higher than that of the near-isogenic line of ‘Toyomizuki’ (Ic allele, upper second left panel) in the field test (This issue, p. 521–528).

(N. Yamaguchi: Hokkaido Research Organization Tokachi Agricultural Experiment Station)