水稻品种外观品质性状稳定性分析

Stability Analysis for Appearance Qualities of Rice Cultivar

基于AMMI模型 ,研究了 18个水稻品种外观品质性状与环境的交互作用 ,并对参试品种的品质性状稳定性进行了分析。以 6个外观品质性状表型值及相应的品种稳定性参数为指标 ,进行系统聚类分析 ,据此对供试品种外观品质性状进行了评价。结果表明 ,品种与环境互作效应在 1%水平显著 ,外观品质性状的稳定性随品种而变化较大 ;随水稻品种的稻米粒长、长宽比值变大 ,相应品质性状的稳定性下降 ;相反 ,垩白率、垩白度越小的水稻品种 ,相应性状的品种稳定性越高。汕优 6 3的 6个外观品质性状均居参试品种平均水平 ,但其品种稳定性极高 ;932 72、南京 16、W0 0 2、苏香粳 2号等水稻品种垩白率低 ,垩白面积小 ,稳定性高 ,可作为水稻外观品质改良的育种亲本。

The performance of cultivar stabilities in appearance qualities, which composed of grain length (GL), grain width (GW), ratio of grain length to width (RLW), ratio of grains with chalkiness (RC), size of chalkiness per grain (SC) and degree of chalkiness (DC), were analyzed by additive main effects and multiplicative interaction (AMMI) model in 18 rice cultivars. The results showed that the genotype by environment interaction was significant at 1% level and the performance of appearance qualities varied with the cultivar. The cultivar stabilities of the rice appearance qualities were decreased with the increase of the corresponding traits. The indica hybrid Shanyou 63 showed the best cultivar stability in all the six appearance qualities, while the conventional cultivars 93272,Nanjing 16, W002 and Suxiangjing 2 exhibited lower RC and SC and higher cultivar stabilities in the two traits. The cultivars with high appearance qualities and stability could be used in elite rice breeding.