POLYMORPHISMS FOR GENETIC AND ECOLOGICAL SYSTEMS WITH WEAK COUPLING
POLYMORPHISMS FOR GENETIC AND ECOLOGICAL SYSTEMS WITH WEAK COUPLING
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DOI：
10.1016/0040-5809(72)90027-5
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发表时间：
1972-01-01
影响因子：
1.4
通讯作者：
MCGREGOR, J
中科院分区：
文献类型：
--
作者：
KARLIN, S;MCGREGOR, J
最近的实验和观察研究已经得出结论，自然群体的大部分基因座通常具有遗传多态性。具体而言，植物、昆虫和动物生物体大量同工酶多态性的发现（Lewontin 和 Hubby，1966；Harris，1966；Brown 和 Allard，1969；Marshall 和 Allard，1969；Kojima 和 Tobari，1969a、b 等）提供了无可争议的证据，证明野生种群中存在相当大的变异性。此外，许多似乎实行部分选型交配的动物种群和几乎是专性近交繁殖但偶尔进行异型杂交的植物种群表现出高度的多态性。对于许多存在大量多态性的高度自交植物群体来说，一个值得注意的事实是杂合子的频率很小，而不同等位基因的纯合子以大致相等的比例存在[参见Allard、Jain和Workman (1968)、Marshall和Allard (1969)和参考文献]。
Recent experimental and observational studies have established conclusively that natural populations are often genetically polymorphic at a large proportion of loci. Specifically, the discovery of vast numbers of isozyme polymorphisms for plant, insect and animal organisms (Lewontin and Hubby, 1966; Harris, 1966; Brown and Allard, 1969; Marshall and Allard, 1969; Kojima and Tobari, 1969a, b, and others) provides incontestible evidence of the considerable variability present in wild populations. Moreover, a number of animal populations which appear to be practicing partia1 assortative mating and plant populations which are almost obligate inbreeders, but which do outcross occasionally, exhibit a high degree of polymorphism. A noteworthy fact for many of these highly selfing plant populations where considerable polymorphism is present, is that the frequency of the heterozygotes is small while the homozygotes of the different alleles exist in approximately equal proportions [see Allard, Jain and Workman (1968), Marshall and Allard (1969) and references].