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。
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.
出处
《生物多样性》
CAS
CSCD
1999年第1期31-37,共7页
Biodiversity Science
基金
国家自然科学基金
教育部资助优秀青年教师基金
关键词
保护生物
遗传漂变
遗传多样性
近交衰退
conservation biology, endangerment, genetic drift, genetic diversity, inbreeding depression
