Theory of niche construction and application of its two-locus population genetic model

The research on relationship between niche construction of species and its evolutionary consequences belongs to the new field in niche theory.We will introduce entirely a development of niche construction theory,discuss the fundamental definition,i.e.what is niche construction,and explore the evolutionary consequence of niche construction by two locus population genetic model.The primary conclusions are:① Niche construction describes the species with evolution scale,materially.Species determine its niche through metabolism,action and selection,including some creation and destruction of its niche;② The pressure of natural selection and the artificial selection have different directions,and the niche construction can lead to different law of evolutionary inertia and evolutionary momentum;③ Niche construction can be a potent evolutionary agent by generating selection that leads to the fixation of otherwise deleterious alleles,supporting stable polymorphisms where none are expected,eliminating what would otherwise be stable polymorphisms and generating unusual evolutionary dynamics,even small amounts of niche construction,or niche construction that only weakly efforts resource dynamics,can significantly alter both ecological and evolutionary patterns.Based on these,we will go deep into our work for three directions and have further comprehension about positive feedback from organisms and their environments.First,building on conventional evolutionary theory,the model emphasizes the capacity of organisms to modify sources of natural selection in their environment;the evolutionary dynamics can also be broadened to incorporate ontogenetic and cultural process,with phenotypes playing a much more active role in evolution.Culture amplifies the capacity of human beings to modify sources of selection in their environments to the point that capacity raises some new questions about the process of human adaptation.So it can be applied to human social science.Second,the proposal of niche construction theory is based on the level of population,but this can be enlarged or reduced to explore explicit problems with various scales.Third,Due to the different evolutionary directions of natural and artificial selection,there would specially highlight the effect of artificial selection on ecological environment influenced by human factors.The above results can be the theoretical supports to the breed and selection of the crop species and the artificial regulation of the crop fields.