Genotype by sowing date interaction effects on sugar yield components in sweet sorghum (Sorghum bicolor L. Moench)

Reddy, P S and Reddy, B V S and Rao, P S (2014) Genotype by sowing date interaction effects on sugar yield components in sweet sorghum (Sorghum bicolor L. Moench). SABRAO Journal of Breeding and Genetics, 46 (2). pp. 241-255. ISSN 1029-7073

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Sweet sorghum (Sorghum bicolor (L.) Moench) has a good potential as a raw material for ethanol production. However, continual supply of feed stock to the distillery is a major constraint in sweet sorghum based ethanol production. The main goals of this research were to determine genotype by sowing date interactions for sugar yield components and to identify high yielding and stable or specifically adapted genotypes for cultivation across the year via ANOVA (analysis of variance) and GGE (genotype + genotype by environment) biplot analysis. Given that sugar yield and quality varies with different sowing dates, 3 hybrids and 2 varieties of sorghum were planted at International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) research farm, India on first of every month from January to December in a split plot design considering sowing date as main plot and genotypes as sub plot. The experiment was repeated for 3 consecutive years between 2007 and 2010 and observations were recorded for sugar yield and contributing traits. Date of sowing was the most important source of variation, accounting for 58 to 94% of the G+S+GS for sugar yield and related traits. Of the 12 monthly sowings, May, June and July sowings recorded highest sugar, cane and juice yields and the yields decreased with delay in sowing there on. The genotypes SPV 422 and ICSSH 30 recorded high sugar yield while ICSSH 24 was stable performer with comparative sugar yield. ‘Which-won-where’ analysis has demarcated the sowing dates into 2 groups and based on mean performance for sugar yield and GGE biplot analysis, the genotype SPV 422 was suitable for sowing from September to March and the genotype ICSSH 30 was suitable for sowing from April to August. However, brix was more of a genetic trait less influenced by the date of sowing.

Item Type: Article
Divisions: RP-Dryland Cereals
CRP: CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords: Sweet sorghum, sowing date, sugar yield, G×E interaction, GGE biplot biofuel
Subjects: Mandate crops > Sorghum
Depositing User: Mr B K Murthy
Date Deposited: 22 Dec 2014 04:49
Last Modified: 06 Oct 2015 07:48
Official URL:
Acknowledgement: UNSPECIFIED
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