Genotypic diversity and environmental stability of starch physicochemical properties in the USDA rice mini-core collection

Kehu Li, Jinsong Bao, Harold Corke*, Mei Sun

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The USDA rice mini-core collection consists of 217 accessions representative of a world-wide germplam bank. We investigated its genotypic diversity in starch physicochemical properties and the effects of genotype, environment and G × E interaction in this study. High genotypic diversity was found in all 18 measured starch quality traits in the mini-core rice in two location-years in China. Genotype, environment and G × E effects on these traits were analysed using 115 common accessions successfully produced in both environments. Thermal properties (To, Tp and Tc) were very stable whereas most other traits differed significantly between environments. However, when these accessions were divided into five subgroups based on amylose content, environment was found to have differential effects. G × E interaction also played a significant role in determining the starch traits. These findings will provide guidance for selection from the diverse genotypes in the USDA mini-core collection for cultivation and for developing cultivars with desired cooking and eating quality.

Original languageEnglish
Pages (from-to)1186-1196
Number of pages11
JournalFood Chemistry
Volume221
DOIs
StatePublished - 15 Apr 2017

Keywords

  • Apparent amylose content
  • Environmental effects
  • Genotypic diversity
  • Physicochemical properties
  • Rice starch
  • USDA rice mini-core collection

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