Genotype × environment interaction for seed amylopectin content in waxy sorghum [Sorghum bicolor (L.) Moench]

Abstract

Waxy sorghum flour can be put to multiple industrial uses. Thirteen waxy and three non-waxy sorghum genotypes were grown across four environments to assess relative genotype (G), environment (E) and genotype × environment (GEI) effects on amylopectin, grain yield and other morphological traits. The amylopectin content (APT) among the high amylopectin sorghum (HAS) lines across the locations ranged from 96.7 (HAS 9) to 99.1 (HAS 3, HAS 5, HAS 6 and HAS 12), while among the checks, it ranged from 78.1 to 81.8%. The G, E, GEI were significant for all the target traits. The genetic component explained more than 90% of the total variance for APT and the environment component for grain yield (GY). The APT and GY correlated significantly and negatively (r = -0.55; p <0.05). The HAS lines produced smaller seeds in size than checks. The HAS 4 with red pericarp and HAS 5 with cream pericarp showed high GY and APT and HAS 4 is suitable for wider adaptation. The HAS lines yielded more at location Hagari, whereas HAS 6 (cream pericarp) and HAS 12 (red pericarp) were specifically adapted.