| 两种三尖杉属植物的遗传多样性研究 |
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| 引用本文： | 关品高,陈少瑜,司马永康.两种三尖杉属植物的遗传多样性研究[J].西部林业科学,2010,39(2):32-37. |
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| 作者姓名： | 关品高 陈少瑜 司马永康 |
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| 作者单位： | 1. 云南森林自然中心,云南,昆明,650224
2. 国家林业局云南珍稀濒特森林植物保护和繁育实验室,云南省森林植物培育和开发利用重点实验室,云南省林业科学院,云南,昆明,650204 |
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| 基金项目： | 国家林业局重点科学技术计划项目 |
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| 摘 要： | 以种子的胚乳为材料,采用等位酶凝胶电泳技术,分析了高山三尖杉和粗榧两种三尖杉属植物的遗传多样性特征。结果表明,高山三尖杉和粗榧的遗传多样性水平较低,其多态位点比率均为0.273,平均每个位点的等位基因数分别为1.364和1.455,平均期望杂合度分别为0.092和0.101,观察杂合度分别为0.074和0.093;内繁育系数分别为0.194和0.086,均存在一定的内繁育现象。结合已报道的三尖杉属其他植物的遗传多样性研究结果,认为:三尖杉属植物低水平的遗传多样性是它们极度濒危现状的反映。建议将三尖杉属的全体植物列为国家重点保护野生植物,以利进一步加强对三尖杉属植物保护的力度和宽度。同时指出,三尖杉属植物的内繁育系数与其自然分布范围大小呈正相关,自然分布范围小的物种比分布范围大的物种具有更为严重的内繁育现象。
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| 关 键 词： | 高山三尖杉 粗榧 遗传多样性 |
Genetic Diversity Analysis of Two Cephalotaxus Species |
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| GUAN Pin-gao,CHEN Shao-yu,SIMA Yong-kang.Genetic Diversity Analysis of Two Cephalotaxus Species[J].Journal of West China Forestry Science,2010,39(2):32-37. |
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| Authors: | GUAN Pin-gao CHEN Shao-yu SIMA Yong-kang |
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| Institution: | GUAN Pin-gao1,CHEN Shao-yu2,SIMA Yong-kang2(1.Yunnan Forest Nature Center,Kunming Yunan 650204,P.R.China,2.Yunnan Laboratory for Conservation of Rare,Endangered & Endemic Forest Plants,State Forestry Administration,Kunming Yunnan 650204,P.R.China) |
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| Abstract: | Using endosperm as material,allozyme gel electrophoresis technique was employed to analyze the genetic diversity of Cephalotaxus alpina and C.sinensis.The results showed that the genetic diversity levels of these two species were low,ratio of the polymorphic loci was 60 % and the average allele number per loci were 1.364 and 1.455 respectively,the average expected heterozygosity were 0.092 and 0.101,the average observed heterozygosity were 0.074 and 0.093,the inbreeding coefficient were 0.194 and 0.086 resp... |
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| Keywords: | Cephalotaxus alpina Cephalotaxus sinensis genetic diversity |
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