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Article: Genetic diversity in properties of starch from Zimbabwean sorghum landraces

TitleGenetic diversity in properties of starch from Zimbabwean sorghum landraces
Authors
Issue Date2001
PublisherAmerican Association of Cereal Chemists, Inc. The Journal's web site is located at http://www.aaccnet.org/cerealchemistry
Citation
Cereal Chemistry, 2001, v. 78 n. 5, p. 583-589 How to Cite?
AbstractStarch was isolated from 95 sorghum landraces from Zimbabwe using an alkali steep and wet-milling procedure. The physicochemical properties of sorghum starch were examined for potential use in Southern Africa. All the landraces evaluated had a normal endosperm indicated by the amylose content of the starches. Starch properties were not correlated to most of the physical grain quality traits evaluated. Grain hardness was weakly correlated to starch gel adhesiveness (r = 0.36) and amylose content (r = 0.38) (P < 0.001). The mean peak viscosity (PV) of the sorghum starches was 324 Rapid Visco Analyser units (RVU) compared with 238 RVU in a commercial corn starch sample; PV was 244-377 RVU. Some landraces had low shear-thinning starches, implying good paste stability under hot conditions. Pasting properties were highly correlated among the sorghum starches. The starch gel hardness showed considerable variation (44-71 g) among the landraces. Gelatinization peak temperatures were 66-70°C. The thermal properties of starches were not correlated with starch swelling and pasting properties. Genotype grouping by highest and lowest values in each category would allow selection of sorghums based on a specific attribute depending on the desired end use.
Persistent Identifierhttp://hdl.handle.net/10722/178728
ISSN
2015 Impact Factor: 1.036
2015 SCImago Journal Rankings: 0.566
References

 

DC FieldValueLanguage
dc.contributor.authorBeta, Ten_US
dc.contributor.authorObilana, ABen_US
dc.contributor.authorCorke, Hen_US
dc.date.accessioned2012-12-19T09:49:21Z-
dc.date.available2012-12-19T09:49:21Z-
dc.date.issued2001en_US
dc.identifier.citationCereal Chemistry, 2001, v. 78 n. 5, p. 583-589en_US
dc.identifier.issn0009-0352en_US
dc.identifier.urihttp://hdl.handle.net/10722/178728-
dc.description.abstractStarch was isolated from 95 sorghum landraces from Zimbabwe using an alkali steep and wet-milling procedure. The physicochemical properties of sorghum starch were examined for potential use in Southern Africa. All the landraces evaluated had a normal endosperm indicated by the amylose content of the starches. Starch properties were not correlated to most of the physical grain quality traits evaluated. Grain hardness was weakly correlated to starch gel adhesiveness (r = 0.36) and amylose content (r = 0.38) (P < 0.001). The mean peak viscosity (PV) of the sorghum starches was 324 Rapid Visco Analyser units (RVU) compared with 238 RVU in a commercial corn starch sample; PV was 244-377 RVU. Some landraces had low shear-thinning starches, implying good paste stability under hot conditions. Pasting properties were highly correlated among the sorghum starches. The starch gel hardness showed considerable variation (44-71 g) among the landraces. Gelatinization peak temperatures were 66-70°C. The thermal properties of starches were not correlated with starch swelling and pasting properties. Genotype grouping by highest and lowest values in each category would allow selection of sorghums based on a specific attribute depending on the desired end use.en_US
dc.languageengen_US
dc.publisherAmerican Association of Cereal Chemists, Inc. The Journal's web site is located at http://www.aaccnet.org/cerealchemistryen_US
dc.relation.ispartofCereal Chemistryen_US
dc.titleGenetic diversity in properties of starch from Zimbabwean sorghum landracesen_US
dc.typeArticleen_US
dc.identifier.emailCorke, H: harold@hku.hken_US
dc.identifier.authorityCorke, H=rp00688en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0034857134en_US
dc.identifier.hkuros63470-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034857134&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume78en_US
dc.identifier.issue5en_US
dc.identifier.spage583en_US
dc.identifier.epage589en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridBeta, T=6603223650en_US
dc.identifier.scopusauthoridObilana, AB=8346878700en_US
dc.identifier.scopusauthoridCorke, H=7007102942en_US

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