Genotype by Environment Interaction Effects on Starch Content and Digestibility in Potato (Solanum tuberosum L.)

Biochemically, starch is composed of amylose and amylopectin but can also be defined by its digestibility rates within the human intestinal tract, i.e., rapidly digested (RDS), slowly digested (SDS), or resistant (RS). The relative ratio of these starch components is the main contributor to differen...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2013-04, Vol.61 (16), p.3941-3948
Main Authors: Bach, Stephanie, Yada, Rickey Y, Bizimungu, Benoit, Fan, Ming, Sullivan, J. Alan
Format: Article
Language:English
Subjects:
amylopectin
amylose
Biological and medical sciences
Breeding
breeding lines
cultivars
digestibility
Digestion
disease resistance
Environment
Food industries
Fruit and vegetable industries
Fundamental and applied biological sciences. Psychology
Gene-Environment Interaction
Genotype
genotype-environment interaction
Glycemic Index
Humans
intestines
potatoes
Solanum tuberosum
Solanum tuberosum - chemistry
Solanum tuberosum - genetics
Solanum tuberosum - metabolism
Species Specificity
Starch - analysis
Starch - metabolism
Starch and starchy product industries
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Summary:Biochemically, starch is composed of amylose and amylopectin but can also be defined by its digestibility rates within the human intestinal tract, i.e., rapidly digested (RDS), slowly digested (SDS), or resistant (RS). The relative ratio of these starch components is the main contributor to differences in the glycemic index (GI) of carbohydrate sources. This study evaluated the digestible starch profile of 12 potato genotypes comprising elite breeding lines and commercial varieties in six environments, with the optimal profile defined as low RDS and high SDS. Genotype by environment interaction (GEI) analysis found significant (p = 0.05) genotypic and environmental effects for all digestibility rate components; however, interaction effects were only significant for SDS. Optimal starch profiles were identified for two genotypes, CV96044-3 and Goldrush. The desirable starch profile in these potato cultivars can be exploited in breeding programs for the improvement of starch profile and other important characteristics such as high yields and disease resistance.
ISSN:0021-8561
1520-5118
DOI:10.1021/jf3030216