Li Kehu, Bao Jinsong, Corke Harold, Sun Mei
School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
Institute of Nuclear Agricultural Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hua Jiachi Campus, Hangzhou 310029, China.
Food Chem. 2017 Apr 15;221:1186-1196. doi: 10.1016/j.foodchem.2016.11.040. Epub 2016 Nov 9.
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 (T, T and T) 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.
美国农业部水稻微型核心种质库由217份代表全球种质库的种质材料组成。在本研究中，我们调查了其淀粉理化性质的基因型多样性以及基因型、环境和基因型与环境互作对其的影响。在中国两个地点年份种植的微型核心水稻中，所测定的18个淀粉品质性状均表现出较高的基因型多样性。利用在两种环境中均成功种植的115份共同种质材料，分析了基因型、环境和基因型与环境互作对这些性状的影响。热性质（糊化起始温度、峰值温度和终止温度）非常稳定，而大多数其他性状在不同环境间差异显著。然而，当根据直链淀粉含量将这些种质材料分为五个亚组时，发现环境具有不同的影响。基因型与环境互作在决定淀粉性状方面也发挥了重要作用。这些研究结果将为从美国农业部微型核心种质库的不同基因型中筛选用于种植的材料以及培育具有理想蒸煮和食用品质的品种提供指导。
