| 思茅松不同居群的染色体核型研究 |
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| 引用本文： | 吴丽圆,赵文书,顾志建.思茅松不同居群的染色体核型研究[J].西部林业科学,1999(2). |
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| 作者姓名： | 吴丽圆 赵文书 顾志建 |
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| 作者单位： | 云南省林业科学院，中科院昆明植物研究所 |
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| 摘 要： | 对思茅松［Ｐｉｎｕｓｋｅｓｉｙａｖａｒ．ｌａｎｇｂｉａｎｅｎｓｉｓ（Ａ．Ｃｈｅｖ．）Ｇａｕｓｅｎ］４个不同居群的染色体核型进行了研究。结果表明：４个不同居群的染色体核型相似，核型公式均为Ｋ（２ｎ）＝２４＝２４ｍ，核型不对称性都属于１Ａ型，染色体次缢痕的数目和位置一致（Ｎｏ．３长臂上）；４个不同居群仅在染色体长度比、着丝点端化值等指标上存在差异。与其他非裸子植物相比，思茅松在染色体上较为保守。
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| 关 键 词： | 思茅松，居群，染色体，核型 |
Study on Chromosome' s Karyotypes of Different Populations of Pinus kesiya var. langbianensis THZ(A.Chev.)Gaussen |
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| Wu LiyuanZhao Wenshu.Study on Chromosome' s Karyotypes of Different Populations of Pinus kesiya var. langbianensis THZ(A.Chev.)Gaussen[J].Journal of West China Forestry Science,1999(2). |
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| Authors: | Wu LiyuanZhao Wenshu |
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| Abstract: | In present paper,chromosome' s karyotypes were investigated with the materials of four different populations of Pinus kesiya var. langbianensis (A.Chev.)Gaussen.Chromosome'KG-*2s karyotypes of these populations mentioned above were very similar.The karyotypes of metaphase chromosomes of all these populations were formulated to be K (2n)=24= 24m.The karyotypes asymmetry of all these populations were of 1A type.Numbers of secondary constriction in chromosomes of all these populations were identical.The secondary constriction in chromosomes of all these populations were located in longarms of the third autochromosome.Differences in these populations were merely displayed in some index,such as the length ratio of chromosomes and the centromeric terminalization value,etc.It was indicated by investigation results that BXPinus kesiya var. langbianensis (A.Chev.)Gaussen was very conservative in respect of chromosomes,compared with other nongymnosperms. |
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| Keywords: | Pinus kesiya var langbianensis(A Chev )Gaussen population chromosome karyotype |
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