| 小麦—滨麦—偃麦草三属杂交后代的细胞遗传学和形态学研究 |
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| 引用本文： | 赵继新,傅杰,武军,杨群慧,陈新宏,何蓓如.小麦—滨麦—偃麦草三属杂交后代的细胞遗传学和形态学研究[J].西北农业学报,2001,10(4):20-24. |
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| 作者姓名： | 赵继新 傅杰 武军 杨群慧 陈新宏 何蓓如 |
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| 作者单位： | 西北农林科技大学 |
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| 基金项目： | 国家自然科学基金项目 (项目编号 :3 9670 45 8)资助 |
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| 摘 要： | 对小麦—滨麦—偃麦草三属杂交后代进行了形态学、育性和细胞遗传学研究。结果表明 :三属杂种杂交结实率较低 ,平均为 2 1 .8%。F1 自交结实率很低 (平均 2 .6% ) ,形态介于双亲之间 ,生长旺盛 ,熟期晚 ,具有较强的杂种优势。 F2 、F3出现严重分离。 F1 根尖体细胞染色体数为 2 n=5 6,花粉母细胞减数分裂中期 平均构型为 1 2 .2 3 2 1 .0 6 0 .2 3 0 .1 3 0 .0 3 0 .0 2 ,同时出现大量多价体。说明普通小麦近缘种属染色体组 J和 E、St的部分染色体之间能形成不紧密的配对。PMC后期 ,有落后染色体排列在赤道板上 ;末期 、末期 分别出现大量的二分孢子带微核和四分孢子带微核现象。这是 F1 育性极低的原因
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| 关 键 词： | 小麦 滨麦 偃麦草 三属杂种 |
| 文章编号： | 1004-1389(2001)04-0020-05 |
| 收稿时间： | 2001/6/12 0:00:00 |
| 修稿时间： | 2001年6月12日 |
Studies on Cytogenetics and Morphology of the Progenies of Trigeneric Hybridization Involving Triticum, Leymus and Thinopyrum |
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| ZHAO Ji-xin,FU Jie,WU Jun,YANG Qun-hui,CHEN Xin-hong and HE Bei-ru.Studies on Cytogenetics and Morphology of the Progenies of Trigeneric Hybridization Involving Triticum, Leymus and Thinopyrum[J].Acta Agriculturae Boreali-occidentalis Sinica,2001,10(4):20-24. |
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| Authors: | ZHAO Ji-xin FU Jie WU Jun YANG Qun-hui CHEN Xin-hong and HE Bei-ru |
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| Institution: | Plant Genetic Engineering and Breeding Key laboratory of Shaanxi Province, College of Agronomy, Northwest Sci Tech University of Agriculture and Forestry, Yangling Shaanxi 712100, China;Plant Genetic Engineering and Breeding Key laboratory of Shaanxi Province, College of Agronomy, Northwest Sci Tech University of Agriculture and Forestry, Yangling Shaanxi 712100, China;Plant Genetic Engineering and Breeding Key laboratory of Shaanxi Province, College of Agronomy, Northwest Sci Tech University of Agriculture and Forestry, Yangling Shaanxi 712100, China;Plant Genetic Engineering and Breeding Key laboratory of Shaanxi Province, College of Agronomy, Northwest Sci Tech University of Agriculture and Forestry, Yangling Shaanxi 712100, China;Plant Genetic Engineering and Breeding Key laboratory of Shaanxi Province, College of Agronomy, Northwest Sci Tech University of Agriculture and Forestry, Yangling Shaanxi 712100, China;Plant Genetic Engineering and Breeding Key laboratory of Shaanxi Province, College of Agronomy, Northwest Sci Tech University of Agriculture and Forestry, Yangling Shaanxi 712100, China |
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| Abstract: | The progenies of trigeneric hybridization involving Triticum,leymus and Thinopyrum were created by the cross between Octoploid Tritilegmus and Octoploid Triti-thinopyrum.The studies on cytogentics,morphology and fertility of the progenies showed that the rate of hybrid-fertility was very low(average only 21.8%).The morphological feature of F1 was between the male and the female parents and its growth have stronger hybrid vigor.The self-fertility of F1 was also rather low(average only 2.6%).The F2 and F3 plants appeared significant segregation phenomenon. |
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| Keywords: | Triticum aestivum Leymus mollis Thinopyrum Trigeneric hybridization |
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