MAINTENANCE OF GENETIC POLYMORPHISM IN A SPATIALLY HETEROGENEOUS ENVIRONMENT - VARIATIONS ONA THEME BY HOWARD LEVENE
MAINTENANCE OF GENETIC POLYMORPHISM IN A SPATIALLY HETEROGENEOUS ENVIRONMENT - VARIATIONS ONA THEME BY HOWARD LEVENE
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DOI：
10.1086/282452
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发表时间：
1966-01-01
影响因子：
2.9
通讯作者：
MACARTHUR, R
中科院分区：
文献类型：
--
作者：
LEVINS, R;MACARTHUR, R
Levene的斑块环境中的多态性模型进行了推广和扩展，包括不同的斑块结构和近亲繁殖。从每个斑块中的杂种优势开始，随着杂合体的适合度降低，我们经过提供稳定多态性的平均杂种优势区域，然后是满足Levene多态性条件的区域，然后是交替平衡区域（一个多态性，一个单态性），最后是一个等位基因的固定。近亲繁殖、斑块丰富度和斑块性的变化也有类似的影响。任何一种都可能导致种群结构的不连续，沿着环境中的连续渐变。
Levene''s model of polymorphism in a patchy environment is generalized and extended to include different patch structures and inbreeding. Starting with heterosis in each patch, as the fitness of the heterozygote decreases we pass through regions of average heterosis providing stable polymorphism, then one satisfying Levene''s condition for polymorphism, then a region of alternative equilibria (one polymorphic, one monomorphic), and finally fixation of one allele. Variation in inbreeding, patch abundance, and patchiness can have similar effects. Any of these can result in a discontinuity in the population structure along a continuous cline in environment.