TY - JOUR
T1 - Genetic and environmental variation in sorghum starch properties
AU - Beta, Trust
AU - Corke, Harold
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2001
Y1 - 2001
N2 - Starch was isolated from eight local Zimbabwean landrace varieties, an improved cultivar (SV2) and a hybrid (DC-75) of sorghum grown in four environments. Amylose content, pasting (peak (PV), hot-paste (HPV), cool-paste (CPV) viscosity), textural and thermal (gelatinisation peak temperature (Tp) and gelatinisation energy (ΔH)) properties of the starches were determined. The F-tests from analyses of variance detected significant (p<0.001) differences among genotypes and growing environments for the starch properties measured. The results indicate that a range of genetic and environmental variability exists for these traits in sorghum genotypes although the latter could be greater than varietal effects. Hybrid DC-75 largely differed in starch amylose content, pasting PV, and gel hardness from the local landrace varieties. Environments used for local landrace varieties caused significant differences in starch properties, hence selection and monitoring of growing conditions is essential if a particular genotype is to maintain minimum variation in the desired pasting, textural or thermal properties. Genotype x environment interactions indicate that in breeding programmes, selection for starch properties at a single location would be misleading.
AB - Starch was isolated from eight local Zimbabwean landrace varieties, an improved cultivar (SV2) and a hybrid (DC-75) of sorghum grown in four environments. Amylose content, pasting (peak (PV), hot-paste (HPV), cool-paste (CPV) viscosity), textural and thermal (gelatinisation peak temperature (Tp) and gelatinisation energy (ΔH)) properties of the starches were determined. The F-tests from analyses of variance detected significant (p<0.001) differences among genotypes and growing environments for the starch properties measured. The results indicate that a range of genetic and environmental variability exists for these traits in sorghum genotypes although the latter could be greater than varietal effects. Hybrid DC-75 largely differed in starch amylose content, pasting PV, and gel hardness from the local landrace varieties. Environments used for local landrace varieties caused significant differences in starch properties, hence selection and monitoring of growing conditions is essential if a particular genotype is to maintain minimum variation in the desired pasting, textural or thermal properties. Genotype x environment interactions indicate that in breeding programmes, selection for starch properties at a single location would be misleading.
KW - Environment
KW - Genotype
KW - Sorghum
KW - Starch properties
UR - http://www.scopus.com/inward/record.url?scp=0035214745&partnerID=8YFLogxK
U2 - 10.1006/jcrs.2000.0379
DO - 10.1006/jcrs.2000.0379
M3 - 文章
AN - SCOPUS:0035214745
VL - 34
SP - 261
EP - 268
JO - Journal of Cereal Science
JF - Journal of Cereal Science
SN - 0733-5210
IS - 3
ER -