| 披碱草和野大麦及其杂种回交后代的农艺特性研究 |
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| 引用本文： | 李微微,李造哲,王磊.披碱草和野大麦及其杂种回交后代的农艺特性研究[J].农业科学与技术,2009,10(2):15-19. |
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| 作者姓名： | 李微微 李造哲 王磊 |
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| 作者单位： | 李微微,李造哲,LI Wei-wei,LI Zao-zhe(内蒙古农业大学生态环境学院,内蒙古呼和浩特,010019);王磊,WANG Lei(黑龙江省农业科学院克山分院,黑龙江齐齐哈尔,161600)
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| 基金项目： | 内蒙古科技厅草业研究院专项基金，国家留学回国人员科研启动基金 |
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| 摘 要： | 为了使披碱草和野大麦的优良特性综合在一起，培育出适合干旱、盐渍生境的牧草新品种，王照兰等（1992—1993年）将披碱草和野大麦组合进行了远缘杂交，成功地获得了高度不育的披碱草和野大麦的正、反交F1代。在正交F1代（披碱草X野大麦）的植株形态学和细胞学初步研究的基础上，笔者拟定了用回交法克服杂种F1代不育性的研究计划。用分株繁殖方法，
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| 关 键 词： | 杂种F1代 野大麦 披碱草 农艺特性 回交后代 优良特性 远缘杂交 繁殖方法 |
Agronomic Characters of Elymus dahuricus, Hordeum brevisubulatum and Their BC1F3 |
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| LI Wei-wei,LI Zao-zhe,WANG Lei.Agronomic Characters of Elymus dahuricus, Hordeum brevisubulatum and Their BC1F3[J].Agricultural Science ＆ Technology,2009,10(2):15-19. |
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| Authors: | LI Wei-wei LI Zao-zhe WANG Lei |
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| Institution: | 1. College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010019; 2. Keshan Branch, Heilongjiang Academy of Agricultural Sciences, Keshan 161600) |
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| Abstract: | Objective] This study was to explore the inheritance of BC1F3 to excellent characteristics of parents(Elymus dahuricus, Hordeum brevisubulatum), heterosis and fertility restoration. Method] The agronomic characters such as growth period, growth rate, pollen fertility, fecundity, reproducibility and fresh grass output of Elymus dahuricus, Hordeum brevisubulatum and BC1F3 were comparatively studied. Result] The growth dynamic of the BC1F3 lined tended to like that of its parent Hordeum brevisubulatum; although growing periods of various lines were different, they were close to that of Hordeum brevisubulatum. There were differences in pollen fertility and seed setting, the pollen fertility rate of YF3-93 was higher than recurrent parent Hordeum brevisubulatum, its seed setting rate in open pollination was also higher. Some lines had low pollen fertility rate and seed setting rate, such as the pollen fertility rate of PF3-52. There were significant differences in the output among BC1F3 lines, e.g. the heterosis (HP) of YF3-64, YF3-74 and YF3-83 were 75.53%, 75.12% and 66.16%, respectively; however, the yields of PF3-52, PF3-15 and PF3-42 were lower than their parents. Conclusion] This study provided reference for breeding new varieties of forage which is suitable to drought and saline environment. |
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| Keywords: | Elymus dahuricus Hordeum brevisubulatum Backcross posterity Agronomic characters |
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