摘要： 本文利用4个不育系和4个恢复系、两组亲本及其16个杂种、两个杂交组合的F₂为材料研究了高粱胚轴伸长潜力、出苗日数和出苗率的遗传规律及其相互关系.结果表明,高粱胚轴伸长潜力和出苗日数具有较高的遗传力,其基因系统的加性效应占主导地位;品种胚轴伸长潜力大小是出苗率高低的决定因素;出苗日数与胚轴伸长潜力呈高度负相关.

关键词: 高粱, 胚轴伸长, 遗传

Abstract: Two groups of sorghum parental lines ( 4 A-lines and 4 R-lines ), their 16 hybrids and F2s of two hybridized combinations were used as materials to study the genetic regularities .which included potentiality of embryo stem extension, the number of days of emergence and the rate of seedling emergence, and their interrelations were studied simultaneously. The results indicated that the potentiality of embryo stem extension and the number of days of seedling emergence have higher genetic ability, and the additive effect of gene system holds a dominant position; the potentiality of embryo stem extension is a decisive factor to the rate of seedlings emergence-, the number of days of emergence is negatively correlated, to a higher degree, with the potentiality of embryo stem extension.

Key words: Sorghum, Embryo stem extension, Genetic