Starch properties of various ZP maize genotypes

Abstract

The objective of this study was to investigate molecular and functional properties of starches isolated from ZP maize genotypes of different genetic background. The protein, fat, ash and resistant starch contents were very low. The amylose content in the isolated starches of 10 ZP maize genotypes was characteristic for both types of maize starches, normal and wa×y. The wa×y type had the highest average molecular weight of amylopectin (4.84 × 108 Da). The onset temperature of gelatinisation values of starches of 10 ZP maize genotypes ranged from 62.1°C to 65.0°C. The wa×y maize starch displayed a significantly higher enthalpy change for gelatinised starch (ΔH=18.1 J/g) than normal maize starches did (ΔH=13.6-15.6 J/g). Rapid Visco Analyser (RVA) profiles of starches of ZP maize genotypes were typical for both types of maize starches, normal and wa×y.