环境条件对水稻籼型软米品种粒形的影响*

 将毫木西等15个软米品种和11个对照品种分别种植于德宏和水富两地，研究软米的粒形在不同的环境条件下的变化。结果表明，软米粒形受环境的影响与粘米和糯米不同。软米的粒长在不同的环境下的变化未达显著水平；粒宽和长宽比都达到了极显著水平。不同的软米品种粒形受环境影响的程度不一，从而可选出粒形变化较小的品种。本试验选出了粒形在不同环境条件下变化较小的毫木占、毫磨牙、八宝米3个软米品种，可作为软米杂交稻品质育种的亲本材料。

The Effect of Environment Condition on the Grain Shape of Soft Rice(Indica)

Planting 15 varieties of indica soft rice and 11 varieties of comparison,researching the variety of grain shape in different area.The result indicated that the effect of the environment condition to soft rice grain shape is different as rigid rice and sticky rice.In different area,the variety of grain length of soft rice is not significant and the variety of grain width,ratio of length to width is significant at 1 percent.It can select varieties with less variation of grain shape under different environment for different varieties were affected by the environment is inconsistent.Based on this experiment,hao mu xi,hao mo ya and ba bao mi possessed the trait that the effect of the environment condition to grain shape is not significant and they can be used as the parents of soft hybrid rice in breeding of quality.