大麦节间长度的杂种优势及基因效应分析  

Analysis of genetic effect and beterosis of internode length in barley:

作　　者：李承道[1] 黄培忠[1] 刘玉芳[1] 马俊虎[1] 陈如梅[1] 

机构地区：[1]上海市农业科学院作物育种栽培研究所,上海201106

出　　处：《浙江农业学报》1993年第3期158-161,共4页Acta Agriculturae Zhejiangensis

基　　金：上海市青年科学基金和国家"八.五"科技攻关项目

摘　　要：用4×5双列杂交研究大麦各节间长度的杂种优势及基因效应,结果表明:各节间长度的杂种优势均存在较大的变异,但以倒二、三、四节间长度的杂种优势较强,而倒一和五节间的杂种优势较弱。节间长度的遗传符合加性—显性模型,但加性效应更重要。平均显性度与杂种优势表现一致。控制倒一、二节间长度的有较多显性基因,而控制基部节间长度的隐性基因较多。除倒一节间长度与粒重呈显著正相关外,其它各节间长度与产量构成因素的相关性均不显著。杂种亲本选配时,应注意控制中部节间的长度。Genetic effect and heterosis of internode length of barley were studied by 4×5 diallel crosses. It was showed that the heterosis of internode length had extensive variance. The 2nd, 3rd and 4th internodes from top had stronger heterosis, while the 1st and the 5th were relatively weaker. The genetics of internode length conformed to the additional-dominant model, but the additional effect was more important. The average dominant degree consisted with the heterosis of each internode. The 1st and the 2nd internode had more dominant genes and the basic internod had more recessive genes, Internode length had no significant relation with yield components except the 1st internode length had significant possitive relation with grain weight. The mid-internode length must be controlled for the parent selection of hybrid barley.

关 键 词：大麦 节间长度 杂种优势 基因效应 

分 类 号：S512.303.5[农业科学—作物学]