| 燕麦属不同种的核型分析与进化的关系 |
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| 引用本文： | 武生辉,李秀娴,李明哲.燕麦属不同种的核型分析与进化的关系[J].内蒙古农业大学学报(自然科学版),1990(2). |
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| 作者姓名： | 武生辉 李秀娴 李明哲 |
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| 作者单位： | 内蒙古农牧学院农学系，内蒙古农牧学院农学系，内蒙古农牧学院农学系 |
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| 摘 要： | 我们观察研究了燕麦属(Avena)中不同倍性三个种的染色体数目和核型。结果如下:砂燕麦Avena strigosa为二倍体,2n=2X=14,核型公式是2n=2X=14=10m+4sm(2SAT),核型类型为2A;野生大燕麦Avena magna为四倍体2n=4X=28,核型公式是2n=4X=28=16m+12Sm(2SAT),核型类型为2A;裸燕麦(莜麦)Avena nuda为六倍体2n=6X=42,核型公式是2n=6X=42=22m+20sm(2SAT),核型类型为2B。从核型结果中可以看出,多倍化是三个种进化重要趋势,随着倍性的增加,核型的不对称性也增加。
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| 关 键 词： | 燕麦属 核型 裸燕麦 |
A Study on the Karyotypes of Three Avena Species and Their Evolution |
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| Wu Shenghui,Li Xiuxian,Li Mingzhe.A Study on the Karyotypes of Three Avena Species and Their Evolution[J].Journal of Inner Mongolia Agricultural University(Natural Science Edition),1990(2). |
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| Authors: | Wu Shenghui Li Xiuxian Li Mingzhe |
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| Institution: | Agronomy Department. Inner-Mongolia Institute of Agriculture & Animal Husbandry |
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| Abstract: | We studied the chromosome numbers and karyotypes of three Avena species having different ploidy. The results were as follows: Avena strigosa is diploid 2n=2X=14, the karyotpe formula is 2n=2X=14=10m+4sm(2SAT), and the karyotype is 2A; Anena magna is tetraploid 2n=4x=28, the karotype formula is 2n=4x=28=16m+12sm(2SAT), and karyotype is 2A; Avena nuda is hexaploid 2n=6x=42, the karyotype formula and the karyotye are 2n=6x=42=22m+20sm(2SAT)and 2B respectivily. We can see from above results that polyploidy is importment evolution tendency for these Auenaspecies. There is an increasing of karyotype unsymmetry with the ploidy raising. |
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| Keywords: | Avena karyotype Naked Oats (Avena nuda) |
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