水稻品种直链淀粉含量、糊化温度和蛋白质含量的稳定性分析

 利用AMMI模型对18个水稻品种的直链淀粉含量（AC）、糊化温度（GT）和蛋白质含量（PC）进行两年三点的稳定性分析，并以AC、GT和PC的表型值及相应的稳定性参数（Di）为性状指标，对供试品种进行聚类分析和评价。结果表明，稻米AC、GT和PC在不同品种和环境间的差异以及G×E互作效应都达到极显著水平（P<0.01）；3项品质性状的稳定性随品种不同而变化较大（0.15≤Di≤2.68），AC、GT和PC稳定性都高的品种仅有W002；综合考虑AC、GT和PC等3项品质性状的表现、稳定性、产量水平等因素，W002、广陵香粳、早丰九号和南京16号等品种可作为育种亲本，以改良水稻品种食味品质及其稳定性。

Analysis on Stability of AC, GT and PC in Rice Varieties(Orzya sativa L.)

The stability of amylose content (AC), gelatinization temperature (GT) and protein content (PC) of rice varieties were analyzed using additive main effects and multiplicative interaction (AMMI) model in two years and three sites. Eighteen tested varieties were further clustered and evaluated based on the phenotypic values of three quality traits and their Di value from the AMMI analysis. The results showed that the genotype by environmental interactions, the difference in phenotype and stability of AC, GT and PC among different genotypes and environments were all significant at 1% level. Also, only one variety, W002, had high stability for all the three quality traits. Additionally, in consideration of AC, GT and PC, and their stability in rice varieties, etc, four rice varieties, W002, Zaofeng 9, Guanglingxiangjing and Nanjing16, could be also adopted as breeding parents to improve eating quality and stability of elite rice.