title: New thoughts on an old riddle: What determines genetic diversity within and between species?
abstract: The question of what determines genetic diversity has long remained unsolved by the modern evolutionary theory (MET). However, it has not deterred researchers from producing interpretations of genetic diversity by using MET. We examine the two observations of genetic diversity made in the 1960s that contributed to the development of MET. The interpretations of these observations by MET are widely known to be inadequate. We review the recent progress of an alternative framework, the maximum genetic diversity (MGD) hypothesis, that uses axioms and natural selection to explain the vast majority of genetic diversity as being at equilibrium that is largely determined by organismal complexity. The MGD hypothesis absorbs the proven virtues of MET and considers its assumptions relevant only to a much more limited scope. This new synthesis has accounted for the overlooked phenomenon of progression towards higher complexity, and more importantly, been instrumental in directing productive research.
authors.affiliation: State Key Laboratory of Medical Genetics, School of Life Sciences, Xiangya Medical School, Central South University, 110 Xiangya Road, Changsha, Hunan 410078, China. Electronic address: huangshi@sklmg.edu.cn.
authors.forename: Shi
authors.initials: S
authors.lastname: Huang
mesh_terms: D000818:Animals; D004247:DNA / Q000145:classification / Q000235:genetics*; D019143:Evolution, Molecular; D056084:Genetic Fitness; D014644:Genetic Variation; D006801:Humans; D008957:Models, Genetic; D010802:Phylogeny; D012641:Selection, Genetic; D013045:Species Specificity
chemical_list: D004247:DNA
keywords: Axioms; Genetic diversity; Maximum genetic diversity (MGD) hypothesis; Modern evolutionary theory (MET)