| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1111/j.0014-3820.2000.tb01236.x |
| The evolutionary dynamics of direct phenotypic overdominance: Emergence possible, loss probable. | |
| Van Dooren TJM | |
| 发表日期 | 2000 |
| 出处 | Evolution 54 (6): 1899-1914 |
| 出版年 | 2000 |
| 语种 | 英语 |
| 摘要 | An evolutionary dynamical system with explicit diploid genetics is used to investigate the likelihood of observing phenotypically overdominant heterozygotes versus heterozygous phenotypes that are intermediate between the homozygotes. In this model, body size evolves in a population with discrete demographic episodes and with competition limiting reproduction. A genotype-phenotype map for body size is used that can generate the two qualitative types of dominance interactions (overdominance versus intermediate dominance). It is written as a single-locus model with one focal locus and parameters summarizing the effects of alleles at other loci. Two types of evolutionarily stable strategy (ESS; continuously stable strategy, CSS) occur. The ESS is generated either (1) by the population ecology; or (2) by a local maximum of the genotype-phenotype map. Overdominant heterozygotes are expected to arise if the population evolves toward the second type of ESS, where nearly maximum body sizes are found. When other loci with partially dominant inheritance also evolve, the location of the maximum in the genotype-phenotype map repeatedly changes. It is unlikely that an evolving population will track these changes; ESSs of the second type now are at best quasi-stationary states of the evolutionary dynamics. Considering the restrictions on its probability, a pattern of phenotypic overdominance is expected to be rare. |
| 主题 | Adaptive Dynamics Network (ADN) |
| 关键词 | Evolutionary dynamics Invasion fitness Lotka-Volterra difference equations Metabolic profit Overdominance |
| URL | http://pure.iiasa.ac.at/id/eprint/5960/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/127885 |
| 推荐引用方式 GB/T 7714 | Van Dooren TJM. The evolutionary dynamics of direct phenotypic overdominance: Emergence possible, loss probable.. 2000. |
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