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当前位置: 首页 > 文章 > 木兰科两个杂交组合的细胞学研究 园艺学报 2003,30 (5) 615-617
Position: Home > Articles > A Cytological Study on Two Hybridized Combinations of Magnoliaceae Acta Horticulturae Sinica 2003,30 (5) 615-617

木兰科两个杂交组合的细胞学研究

作  者：
龚洵;张国莉;潘跃芝
单  位：
中国科学院昆明植物研究所
关键词：
木兰属;含笑属;杂交组合;染色体
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
译  名：
A Cytological Study on Two Hybridized Combinations of Magnoliaceae
作  者：
Gong Xun 1,2 ,Zhang Guoli 1,and Pan Yuezhi 1 ( 1Kunming Institute of Botany,Chinese Academy of Sciences,Kunmi ng 650204, China; 2School of Life Science, Zhongshan University , Guangzhou 510275 ,China)
关键词：
Magnolia;Michelia;Hybridized combination;Chromosom e
摘  要：
The chromosome number and size of two intergeneric hybri dized combinat ions 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 o f 2n=2x=38.The intergeneric hybridized combination,Magnolia liliflora(♀ ) × Michelia yunnanensis(♂),is triploid with a chromosome number of 2n=3x=57,wh ich was a half of the total chromosome number of its two parents.Of which,38 chr omosomes from M.liliflora are smaller,and 19 chromosomes from M.yunnanensi s 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 hexap loid species with a chromosome number of 2n=6x=114.The intergeneric hybridized c ombination,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,i n number and size.So,the hybridized combination is not a real hybrid, and the fi lial generation may be resulted from apomixes.The study showed that cytological method is one of efficient measures applied to early identification in crossbre eding 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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