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Characterisation of grain quality in diverse sorghum germplasm using a Rapid Visco-Analyzer and near infrared reflectance spectroscopy

Shewayrga, H. and Sopade, P. A. and Jordan, D. R. and Godwin, I. D. (2012) Characterisation of grain quality in diverse sorghum germplasm using a Rapid Visco-Analyzer and near infrared reflectance spectroscopy. Journal of the Science of Food and Agriculture, 92 (7). pp. 1402-1410. ISSN 0022-5142

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Article Link(s): http://dx.doi.org/10.1002/jsfa.4714

Abstract

BACKGROUND: Twenty-two diverse sorghum landraces, classified as normal and opaque types obtained from Ethiopia, were characterised for grain quality parameters using near infra-red spectroscopy (NIRS), chemical and Rapid Visco-Analyzer (RVA) characteristics. RESULTS: Protein content ranged from 77 to 182 g kg-1, and starch content from 514 to 745 g kg(-1). The NIRS analysis indicated the pig faecal digestible energy range from 14.6 to 15.7MJ kg(-1) as fed, and the ileal digestible energy range from 11.3 to 13.9MJ kg(-1) as fed. The normal sorghums had higher digestible energy than the opaque sorghums, which exhibited lower RVA viscosities, and higher pasting temperatures and setback ratios. The RVA parameterswere positively correlated with the starch content and negatively correlated with the protein content. The normal and opaque types formed two distinct groups based on principal component and cluster analyses. CONCLUSION: The landraces were different for the various grain quality parameters with some landraces displaying unique RVA and NIRS profiles. This study will guide utilisation of the sorghum landraces in plant improvement programs, and provides a basis for further studies into how starch and other constituents behave in and affect the properties of these landraces. (C) 2011 Society of Chemical Industry

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:Shewayrga, Hailemichael Sopade, Peter A. Jordan, David R. Godwin, Ian D. Sida The first author acknowledges the financial support of SIDA for the study. The authors are grateful to David Appleton (School of Agriculture and Food Sciences, University of Queensland), and Glen Fox and Donna Hocroft (QAAFI) for technical support. Wiley-blackwell Malden
Keywords:viscosity landraces NIRS ileal digestible energy grain quality shear thinning properties starch digestibility protein-quality bicolor l. wheat gene corn gelatinization landraces endosperm
Subjects:Science > Botany > Genetics
Plant culture > Field crops > Sorghum
Deposited On:04 Feb 2014 03:31
Last Modified:04 Feb 2014 03:31

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