摘要： 利用13对不育系及其保持系材料和杂交组合130B×1141B的F2群体,研究了高粱茎秆含糖量在灌浆期间的积累变化规律,估算了遗传相关参数。结果认为,不同不育系之间,不育系与保持系之间的茎秆糖分积累有所不同。育性不稳、自交结实率较高的不育系与保持系一样,在灌浆中期茎秆含糖量较低,随后含糖量又有回升,而正常不育系茎秆的含糖量在此期间保持较高的水平。灌浆后期少数不育系和多数保持系的茎秆含糖量较低。用F2群体进行的遗传分析表明,高粱茎秆中的含糖量和茎汁液含量遗传均符合一对主基因加显模型,其显性效应为负向。两者的主基因遗传率分别为62.97%和55.83%。据此,提出了在高含糖量育种上,选择籽粒成熟期茎秆含糖量高的材料,以及在杂交高代材料中对含糖量进行选择容易得到预期效果。

关键词: 高粱, 含糖量, 积累, 遗传参数, 育种

Abstract: 13 male sterile lines and their restorers were adopted,the F2 generation from the cross of 130B ×1141B was used to study the sugar accumulation and inheritance in sorghum stalk .Results showed that the sugar content of the stalks among male sterile lines and between the male sterile lines and theirs restorers were different .Lower sugar content was observed at the middle milking stage in the stalk of restorers and some of the male sterile lines with high grain bearing percentage for theirs unstable male sterile characters .There was a higher sugar content in those normal male sterile lines at this stage .When developed to later milking stage,the sugar content in some of the male sterile lines and majority of the restorers were low .The F2 population showed that the inheritance of sugar content and the juice content in sorghum stalk were fit the single gene additive -dominant effect model and the dominant effects were negative .The gene heritability of sugar content and juice content in sorghum stalk were 62 .97 % and 55 .83 %.We suggested that choose the plant with higher sugar content at later milking stage and in the higher progeny population were credible in sorghum breeding of high sugar content .

Key words: Sorghum, Sugarcontent, Accumulation, Inheritanceparameter, Breeding

中图分类号: 

• S514.03