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籽粒干重增重率(Y)与距抽穗日数(x)的关系呈 S 型曲线,配合 Logisfic方程后发现,品种间强势粒的增重过程可用同一方程表示,而弱势粒增重过程的品种间差异显著,故不同品种的籽粒增重特征应集中反映于它们强、弱势粒位间增重模型差异的性质上。二棱大麦(Hordeum distichum)强、弱势粒问呈同步增重型,多棱大麦(H.vulgare)呈异步增重型,从中又可区分为弱势粒初期滞增亚型(多棱疏穗大麦)与弱势粒后期早衰亚型(多棱密穗大麦)两种。上述特征在遮穗、剪叶、剪芒和部分剪穗条件下仍能充分反映,这说明上述区分应内涵其一般生物学意义。改变条件时,异步增重型品种的弱势粒表现出强烈的粒重调节能力。
The relationship between grain dry weight gain rate (Y) and heading date (x) showed a S-shaped curve. When Logisfic equation was used, it was found that the same process could be used to describe the weight gain of grains. The difference between the two varieties is significant. Therefore, the grain weight-increasing characteristics of different varieties should be mainly reflected in the nature of the difference between their strong and weak grain weight gain models. Hordeum distichum is characterized by synchronous and increased weight. The H. vulgare is an asynchronous increase weight type, which can be further divided into the initial delay subtype of weak seed ) And inferior grain late premature senescence subtype (multi-ribbed barley) two. The above characteristics can still be fully reflected under the circumstance of cuticle, cut leaf, shear cut and part cuttings, which indicates that the above distinction should connot its general biological significance. When conditions were changed, weaker grains of asynchronous weight gain varieties showed strong grain weight regulation ability.