Chinese Journal of Rice Science

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Characterization of Dwarf Isogenic Lines of indica Rice

Zhu Lihong; Xie Chongqing; Wang Haoxi; Teng Youren; Xu Qin; Dai Jian   

  • Received:1900-01-01 Revised:1900-01-01 Online:1995-07-10 Published:1995-07-10

籼稻矮秆等基因系分析

朱立宏1; 谢重庆2; 王浩熙1; 滕友仁3; 徐芹4; 戴剑5   

  1. 1南京农业大学农学系,南京210095;2 Auburn University, U S A;3 江苏省盐城市种子公司,盐城224000;4 江苏省淮阴市农业专科学校,淮阴223200;4 江苏省农业科学院,南京210014

Abstract: Two sets of dwarf isogenic lines of indica rice have been developed by crossing eleven dwarf and semidwarf varieties or lines respectively with two tall cultivars, Mianhuatiao and Nanjing 6, and backcrossing forfive generations to the tall cultivars. Pleiotropical effects of dwarf genes on twenty two kinds of characters pertaining to plant height, leaf pattern, and yielding capabilities were studied. Results indicated that multiple effects of dwarf genes were apparent on such traits as plant height, length of four internodes above ground, length of panicle,length and width of upper three leaves, leaf angle of boot leaf and second leaf counting from the top. Differenceswere observed between sd-1 and nonallelic dwarf genes. Most charalters between isogenic lines and correspondingvarieties or lines were found to be significantly different also. The tentative cause of variation not due topleiotropism were discussed.

Key words: dwarf, indica rice, isogenic line, pleiotropism

摘要: 以11个籼稻矮秆品种(系)高秆籼稻棉花条和南京6号为轮回亲本,连续回交5代,育成两套籼稻矮秆等基因系。比较分析了有关株高、叶片配置和产量等22种性状的变异。结果表明:株高、地上部节间长、穗长、上部3叶片的长宽、剑叶和倒二叶的夹角等14个性状明显受矮秆基因多效性的影响。sd-1和非等位基因间存在差别。等基因系与原品种(系)之间,株高和地上部节间长多数性状有显著差别。讨论了非基因多效性引起的变异的遗传原因。

关键词: 籼稻, 矮秆, 等基因系, 基因多效性