Effect of genotype and environment on grain quality of sorghum (Sorghum bicolor L. Moench) lines evaluated in Kenya
2018
Grain sorghum (Sorghum bicolor) has a great potential for use as food and beverage in developing
countries. However, information regarding the effect of the agro-ecological environments on the grain
quality attributes of selected sorghum lines desirable for malting and brewing and for baking in Kenya,
is lacking. The experiments of this study were conducted at different environmental locations in
Kisumu, Siaya and Busia Counties of Kenya. Nine sorghum lines were sown in plots in Randomized
Complete Block Design (RCBD) and replicated three times. Panicles from two central rows of each plot
were harvested at physiological maturity to provide grains that were used for proximate analysis. The
percentage crude protein, tannin and starch content were determined. The amount of starch varied with
sorghum lines and growing environments, ranging between 29.7 and 80.2%. SDSAI × ICSR43 line
recorded tannin content in the range of 8.00 to 24.33 mg/100 ml tannic acid equivalents. Crude protein
content and starch ranged 8.9 to 15.4% and 29.7 to 80.2%, respectively across environments. The
combined analysis showed that the growing environment variously affected the nutritional and antinutritional
content of sorghum lines. This implies that breeders should consider stability of the quality
parameters that define commercial utilization of these sorghum lines.
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