Evaluation of nutritional profiles of starch and dry matter from early potato varieties and its estimated glycemic impact.

To identify healthier potatoes with respect to starch profiles, fourteen early varieties were evaluated for their dietary fiber, total starch, rapidly digestible (RDS), slowly digestible (SDS), and resistant (RS) starch for nutrition and with regard to estimated glycemic index (eGI) and glycemic load (eGL). While all these profiles were highly dependent on the potato variety, eleven out of fourteen varieties were classified as low GL foods (p<0.05). A strong positive correlation was observed with eGI and RDS (r=0.975-1.00, 0.96-1.00 and 0.962-0.997 for uncooked, cooked and retrograded varieties, respectively), whereas a strong negative correlation was observed between eGI and RS (r=-0.985 to -0.998, -0.96 to -1.00 and -0.983 to -0.999 for uncooked, cooked and retrograded varieties respectively, p<0.05). For the cultivars examined, the present study identified RDS and RS as major starch factors contributing to eGI.

[1]  Suman Mishra,et al.  Nutritional Value of Potatoes: Digestibility, Glycemic Index, and Glycemic Impact , 2009 .

[2]  L. Copeland,et al.  Discovery of a low-glycaemic index potato and relationship with starch digestion in vitro , 2013, British Journal of Nutrition.

[3]  L. Copeland,et al.  Starch retrogradation: a comprehensive review , 2015 .

[4]  Juming Tang,et al.  Impact of food processing on the glycemic index (GI) of potato products , 2014 .

[5]  J. Seidell,et al.  Carbohydrate intake and obesity , 2007, European Journal of Clinical Nutrition.

[6]  S. Hizukuri.  Studies on Starch Phosphate , 1970 .

[7]  A. Karim,et al.  Effects of phosphorus contents on the gelatinization and retrogradation of potato starch. , 2007, Journal of food science.

[8]  R. Yada,et al.  The synergistic effects of amylose and phosphorus on rheological, thermal and nutritional properties of potato starch and gel , 2012 .

[9]  L. Thompson,et al.  Factors affecting starch digestibility and the glycemic response with special reference to legumes. , 1983, The American journal of clinical nutrition.

[10]  F. Saura-calixto,et al.  A starch hydrolysis procedure to estimate glycemic index , 1997 .

[11]  Qiang Liu,et al.  Physicochemical properties of dry matter and starch from potatoes grown in Canada , 2007 .

[12]  J. A. Sullivan,et al.  Genotype by environment interaction effects on fibre components in potato (Solanum tuberosum L.) , 2012, Euphytica.

[13]  H. Englyst,et al.  Classification and measurement of nutritionally important starch fractions. , 1992, European journal of clinical nutrition.

[14]  S. Tabata,et al.  Studies on Starch Phosphate. Part 2. Isolation of Glucose 3‐Phosphate and Maltose Phosphate by Acid Hydrolysis of Potato Starch , 1971 .

[15]  P. Williams,et al.  rapid colorimetric procedure for estimating the amylose content of starches and flours , 1970 .

[16]  S. Lim,et al.  Effect of partial gelatinization and retrogradation on the enzymatic digestion of waxy rice starch , 2006 .

[17]  HuChanli,et al.  Influence of cultivar and year on phytochemical and antioxidant activity of potato (Solanum tuberosum L.) in Ontario , 2012 .

[18]  T. Wolever,et al.  Glycemic index of potatoes commonly consumed in North America. , 2005, Journal of the American Dietetic Association.

[19]  Kaye Foster-Powell,et al.  International Tables of Glycemic Index and Glycemic Load Values: 2008 , 2008, Diabetes Care.

[20]  G A Colditz,et al.  Dietary fiber, glycemic load, and risk of non-insulin-dependent diabetes mellitus in women. , 1997, JAMA.

[21]  J. Brand-Miller.  Glycemic load and chronic disease. , 2003, Nutrition reviews.

[22]  I. Sotome,et al.  In vitro starch digestibility and in vivo glucose response of gelatinized potato starch in the presence of non-starch polysaccharides , 2015 .

[23]  Kaye Foster-Powell,et al.  International table of glycemic index and glycemic load values: 2002. , 2002, The American journal of clinical nutrition.

[24]  E. Bertoft,et al.  Structure of Potato Starch , 2009 .

[25]  I. Zaidul,et al.  Enzymatic hydrolysis of potato starches containing different amounts of phosphorus , 2009 .

[26]  S. Engelsen,et al.  The Effects of Amylose and Starch Phosphate on Starch Gel Retrogradation Studied by Low-field 1H NMR Relaxometry , 2003 .

[27]  M. Camire,et al.  Potatoes and Human Health , 2009, Critical reviews in food science and nutrition.

[28]  M. Miles,et al.  The roles of amylose and amylopectin in the gelation and retrogradation of starch , 1985 .

[29]  K. Enevoldsen,et al.  Starch Phosphorylation in Potato Tubers Proceeds Concurrently with de Novo Biosynthesis of Starch , 1994, Plant physiology.

[30]  K. M. Behall,et al.  Effect of starch structure on glucose and insulin responses in adults. , 1988, The American journal of clinical nutrition.

[31]  R. Giacco,et al.  Role of glycemic index and glycemic load in the healthy state, in prediabetes, and in diabetes. , 2008, The American journal of clinical nutrition.

[32]  S. Vinoy,et al.  Glycaemic index of cereal products explained by their content of rapidly and slowly available glucose , 2003, British Journal of Nutrition.

[33]  A. Thybo,et al.  Changes occurring in potatoes during cooking and reheating as affected by salting and cool or frozen storage : a LF-NMR study , 2008 .

[34]  Serge Pérez,et al.  The molecular structures of starch components and their contribution to the architecture of starch granules: A comprehensive review , 2010 .

[35]  S. Hizukuri,et al.  Location of phosphate groups in potato amylopectin , 1982 .

[36]  J. Jane,et al.  Resistant starch: promise for improving human health. , 2013, Advances in nutrition.

[37]  N. Singh,et al.  Effect of cooking on amylose content of rice , 2012 .

[38]  R. Hoover,et al.  Composition, molecular structure, and physicochemical properties of tuber and root starches: a review , 2001 .

[39]  D. Lynch,et al.  Glycemie index — a review and implications for the Potato industry , 2007, American Journal of Potato Research.

[40]  M. Storey,et al.  Income and race/ethnicity influence dietary fiber intake and vegetable consumption. , 2014, Nutrition research.

[41]  M. Sitohy,et al.  Degradability of Different Phosphorylated Starches and Thermoplastic Films Prepared from Corn Starch Phosphomonoesters , 2001 .

[42]  C. Brennan.  Dietary fibre, glycaemic response, and diabetes. , 2005, Molecular nutrition & food research.