| 木兰科两个杂交组合的细胞学研究 |
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| 引用本文： | 龚洵,张国莉,潘跃芝.木兰科两个杂交组合的细胞学研究[J].园艺学报,2003,30(5):615-618. |
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| 作者姓名： | 龚洵 张国莉 潘跃芝 |
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| 作者单位： | (中国科学院昆明植物研究所, 昆明650204 ; 中山大学生命科学学院, 广州510275) |
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| 基金项目： | 云南省自然科学基金资助项目(2003C0062M)，云南省中青年学术与技术带头人后备人才培养资助项目 (95 19) |
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| 摘 要： | 研究了木兰科中木兰属( Magnolia) 和含笑属( Michelia) 间两个杂交组合后代的染色体。杂交组合紫玉兰( ♀) ×云南含笑( ♂) 后代的染色体数目为2n = 3x = 57 , 正好是四倍体紫玉兰(2n = 4x =76) 和二倍体云南含笑(2n = 2x = 38) 的染色体半数之和, 证明该F1 为两者的杂交种; 杂交组合球花含笑( ♀) ×广玉兰( ♂) 后代的染色体数目为2n = 2x = 38 , 与二倍体球花含笑(2n = 2x = 38) 相同, 而不是球花含笑和广玉兰(2n = 6x = 114) 的染色体半数之和, 证明该F1 代不是真正的杂交种, 可能是无融合生殖的结果。本研究结果支持含笑属与木兰属玉兰亚属具有较近亲缘关系的观点。
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| 关 键 词： | 木兰属 含笑属 杂交组合 染色体 |
| 文章编号： | 0513-353X(2003)05-0615-03 |
| 收稿时间： | 2002-12-25 |
| 修稿时间： | 2002年12月25 |
A Cytological Study on Two Hybridized Combinations of Magnoliaceae |
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| Gong Xun ,Zhang Guoli ,and Pan Yuezhi.A Cytological Study on Two Hybridized Combinations of Magnoliaceae[J].Acta Horticulturae Sinica,2003,30(5):615-618. |
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| Authors: | Gong Xun Zhang Guoli and Pan Yuezhi |
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| Institution: | 1. Department of General Surgery, Zhejiang University, Hangzhou 310016, China;
2. Center of Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310016, China |
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| Abstract: | The chromosome number and size of two intergeneric hybridized combinations between Magnolia and Michelia in Magnoliaceae were studied in this paper. Magnolia liliflora is a tetraploid species with a chromosome number of 2n = 4x = 76 , Michelia yunnanensis is diploid species with a chromosome number of 2n = 2x = 38.The intergeneric hybridized combination , Magnolia liliflora ( ♀) ×Michelia yunnanensis ( ♂) , is triploid with a chromosome number of 2n = 3x = 57 , which was a half of the total chromosome number of its two parents. Ofwhich , 38 chromosomes from M. liliflora are smaller , and 19 chromosomes from M. yunnanensis are larger.So , the hybrid was confirmed to be crossbreeding filial generation of M. liliflora and M. yunnanensis. Michelia sphaerantha is a diploid species with a chromosome number of 2n = 2x = 38. Magnolia grandiflora is a hexaploid species with a chromosome number of 2n = 6x = 114. The intergeneric hybridized combination , M. sphaerantha ( ♀) ×M. grandiflora ( ♂) , is a diploid with a chromosome number of 2n = 2x = 38 , which is the same to that of its female parent , M. sphaerantha , in number and size. So , the hybridized combination is not a real hybrid , and the filial generation may be resulted from apomixes. The study showed that cytological method is one of efficient measures applied to early identification in crossbreeding of Magnoliaceae. The cross - compatibility indicated that Michelia is closely allied with Magnolia subgenus Yulania and is far allied with Magnolia subgenus Magnolia in phylogeny. |
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| Keywords: | Magnolia Michelia Hybridized combination Chromosom e |
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