| 遗传多样性与濒危植物保护生物学研究进展 |
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| 引用本文： | 张大勇,姜新华.遗传多样性与濒危植物保护生物学研究进展[J].生物多样性,1999,7(1):31-37. |
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| 作者姓名： | 张大勇 姜新华 |
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| 作者单位： | 北京师范大学生态学研究所,北京,100875 |
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| 基金项目： | 国家自然科学基金,教育部资助优秀青年教师基金 |
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| 摘 要： | 尽管对于濒危物种的遗传学人们已经进行了大量研究，但是种群遗传学在植物保护中的实际地位尚存在很大争议。濒危物种的遗传多样性可能会由于遗传漂变、近交的作用而丧失；但这种丧失更可能是濒危的结果而不是濒危的起因。遗传多样性水平与物种生存力之间没有任何必然的联系。但植物种群遗传结构如果由于自交不亲和等位基因的丧失和与亲缘种杂交造成的遗传同化而发生改变，那么它对物种生存力会产生明显负作用。
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| 关 键 词： | 保护生物学 濒危 遗传漂变 遗传多样性 近交衰退 |
| 收稿时间： | 1998-7-28 |
| 修稿时间： | 1998-12-15 |
Progress in studies of genetic diversity and conservation biology of endangered plant species |
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| ZHANG Da-Yong,JIANG Xin-Hua.Progress in studies of genetic diversity and conservation biology of endangered plant species[J].Biodiversity Science,1999,7(1):31-37. |
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| Authors: | ZHANG Da-Yong JIANG Xin-Hua |
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| Abstract: | Although there have been extensive studies on the genetics of endangered plant species, it is still highly debatable about the role of population genetics in rare plant conservation. The genetic diversity of endangered species may be lost due to genetic drift and inbreeding, but this loss is more likely to be a symptom of endangerment rather than its cause. There is no clear cut relationship between the level of genetic diversity and species viability. Changes in the genetic structure of plant populations may exert negative influence on population persistence if this change involves loss of self incompatibility alleles or genetic assimilation through hybridization with a reproductively compatible relative. |
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| Keywords: | conservation biology endangerment genetic drift genetic diversity inbreeding depression |
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