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高粱枝梗是籽粒的载体,是决定产量的重要性状。文中对高粱枝梗级别、数量进行了叙述。一般来说高粱品种或品系仅有一~三级枝梗,而杂交种尚有四、五级枝梗;在同一枝梗上着生的籽粒,下部小,上部次之,中部大;枝梗数量与产量呈正相关,抽穗期对枝梗的直接效应大。一级枝梗的加性效应是遗传控制的主要因素;二、三级枝梗的遗传控制中显性效应大于加性效应;四、五级枝梗基本是显性效应,无加性效应。杂交种的培育应注重超亲优势的利用。
Sorghum branch stem is the carrier of grain, which is an important trait of yield. In this paper, the sorghum branch level, the number of described. Generally speaking, sorghum varieties or lines have only one to three branches, while hybrids have four or five branches; the same branches on the birth of the grain, the lower part of the small, the upper second, the middle large; number of branches And the yield was positively correlated, the direct effect of the heading stage on the big branch. The additive effect of the primary branch stems is the main factor of genetic control. The dominant effect of the second and third branch stems is more than the additive effect in the genetic control. The fourth and the fifth branch stems are basically the dominant effect without additive effect. Hybrid breeding should focus on the use of super-parents advantage.