title: Evaluation of nutritional profiles of starch and dry matter from early potato varieties and its estimated glycemic impact.
abstract: 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.
authors.affiliation: Department of Food Science, University of Guelph, Guelph, ON N1G2W1, Canada. Electronic address: rpinhero@uoguelph.ca.
authors.forename: Reena Grittle
authors.initials: RG
authors.lastname: Pinhero
authors.affiliation: Department of Food Science, University of Guelph, Guelph, ON N1G2W1, Canada; Agriculture and Agri-Food Canada, Guelph Food Research Centre, Guelph, Ontario N1G 5C9, Canada. Electronic address: rwaduge@yahoo.com.
authors.forename: Renuka Nilmini
authors.initials: RN
authors.lastname: Waduge
authors.affiliation: Agriculture and Agri-Food Canada, Guelph Food Research Centre, Guelph, Ontario N1G 5C9, Canada. Electronic address: Qiang.Liu@AGR.GC.CA.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Department of Plant Agriculture, University of Guelph, Guelph, Ontario N1G 2W1, Canada. Electronic address: asulliva@uoguelph.ca.
authors.forename: J Alan
authors.initials: JA
authors.lastname: Sullivan
authors.affiliation: Agriculture and Agri-Food Canada, Guelph Food Research Centre, Guelph, Ontario N1G 5C9, Canada. Electronic address: Rong.Cao@AGR.GC.CA.
authors.forename: Rong
authors.initials: R
authors.lastname: Tsao
authors.affiliation: Agriculture and Agri-Food Canada, Fredericton, New Brunswick E3B 4Z, Canada. Electronic address: Benoit.Bizimungu@AGR.GC.CA.
authors.forename: Benoit
authors.initials: B
authors.lastname: Bizimungu
authors.affiliation: Department of Food Science, University of Guelph, Guelph, ON N1G2W1, Canada; Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC V6T 1Z4, Canada. Electronic address: r.yada@ubc.ca.
authors.forename: Rickey Y
authors.initials: RY
authors.lastname: Yada
mesh_terms: D001786:Blood Glucose; D003296:Cooking; D004043:Dietary Fiber / Q000032:analysis; D004063:Digestion; D038321:Glycemic Index; D009753:Nutritive Value; D011198:Solanum tuberosum / Q000737:chemistry*; D013045:Species Specificity; D013213:Starch / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
chemical_list: D001786:Blood Glucose; D004043:Dietary Fiber; D013213:Starch
keywords: Glycemic index; Glycemic load; Potato; Rapidly digestible starch; Resistant starch; Slowly digestible starch