In the breeding program for high-yielding sorghum, grain quality improvement needs high consideration to meet consumer demands. Thirty sorghum genotypes underwent genetic variation evaluation, with 13 undergoing assessment for genotype by environment effects on the amylose content. The research proceeded in three Indonesian provinces from June–December 2022. The results showed genetic variations among the sorghum genotypes for amylose content and yield traits with a high and medium heritability for yield traits and amylose content, respectively. The genotype Demak 4 had the lowest amylose content (8.57%), and 10 genotypes with amylose content had a range of 10% to less than 20% (Keris M-3, 431, CK.2, Rumbia, Pulut 3, Keris, Gadam Human, 867.032, Lokal Bima 3, and Cantel Ketan), and 19 genotypes showed amylose content higher than 20%. No correlation between amylose content and yield exists. The analysis of combined variance showed that genotypes had a highly significant effect; however, location and the interaction of genotype and location had no significant influence on the amylose content of sorghum. Genotypes Pulut 3 and CK.2 consistently received a heterowaxy classification, with Demak 4 classified as waxy sorghum by growing in three different environments. This data would benefit the selection of promising genotypes for crossing and designing a breeding program to develop high-yield cultivars with low and medium amylose content.
Amylopectin, GE interaction, rice, simultaneous selection, quality
The information produced by this research would help breeders select parental candidates in a breeding program for developing high-yielding cultivars with low or medium amylose content. The recommended genotypes for sources of genes controlling amylose content are Demak 4, Pulut 3, 431, CK 2, Lokal Bima 3, and Cantel Ketan.