Abstract:

Quality characters of seed including 100-seed weight, seed coat color, production rate of sweetened bean paste, starch content, size of starch granule, etc. were analyzed using adzuki bean germplasm resources from major production regions in China. The 100-seed weight of adzuki bean averaged 11.63 g, and ranged from 61.90% to 75.98%. The geometric value of starch granules of adzuki bean 57.71 μm, and ranged from 46.21 to 83.46 μm. The red value(a*) 19.71, and ranged from 13.0 to 26.0. The yellow value(b*) 9.58, and ranged from 5.2 to 16.8. The brightness value(L*) 26.47, and ranged from 18.1 to 34.0. The production rate of sweetened bean paste 68.08%, and ranged from 61.90% to 75.98%. The total starch content 57.06%, and ranged from 44.79% to 67.44%. The amylopectin relative content 82.24%, and ranged from 62.61% to 98.94%. There were remarkable differences between varieties on each of the eight investigated quality characters. The heritability values of the six characters of 100-seed weight, a*, b*, L*, tatol starch content and amylopectin relative contents were comparatively high. The heritability values of the two characters of geometric average value of starch granules and production rate of sweetened bean paste were relatively low. There were comparatively high potentialities select to all of the eight quality characters. A batch of excellent germplasm resources were obtained by selection, which can be applied to quality breeding in adzuki bean.

Key words: Adzuki bean（Vigna angularis）, Germplasm resource, Starch granules, Seed color, Whole starch contents, Production rate of sweetened bean paste, Genetic parameter