The relations of 1000-seed weight, Starch Content and its Structures to Alcohol Volume of Sorghum Grain
Wang, R. C. and C. T. Tseng
This study were undertaken to evaluate the relations of Sorghum [Sorghum bicolor (L) Moench] 1000-seed-weight, starch content and its structures to alcohol volume. The information were provided to help in breeding the brewing wine sorghum hybrids. Thirty R lines were used in this study. These lines were selected with pedigree breeding method from a C3 population. The experimental results indicated that the correlation of alcohol volume to 1000-seed-weight was negative and to starch content was significant positive, the r values were –0.1275 and +0.4404, respectively. However, the correlation between 1000-seed-weight and seed coat content was significant positive (r=0.499), the correlation between 1000-seed-weight and starch content was negative (r=-0.351). Therefore, it was clearly that the seed weight was mostly from seed coat than from that of starch. The correlations of alcohol volume to the contents of starch and amylopectin were positive, their r values were 0.4404 and 0.3134, respectively, but the correlation between alcohol volume and amylose content was negative (r=-0.0116) and the correlation between alcohol volume and amylopectin was positive (r=+0.3134). In other words, higher the contents of starch and amylopectin was more the alcohol volume. Thus, inbred lines with higher contents of starch and amylopectin were more useful than those higher I 100-seed-weight and amylose content for breeding of wine brewing sorghum hybrids.
Key words: sorghum, alcohol volume, amylose, amylopectin
Accepted for publication: October 5, 1996