The abundant, senile or late-onset type of Alzheimer's disease is epidemiologically sporadic and can be attributed to polygenic influences and environmental factors [ 3].
These reductions in marker effects due to spurious associations may result in an increased variance attributed to the polygenic effect.
No study has determined whether cognitive impairments can be attributed to schizophrenia's polygenic architecture using data from GWAS.
Genome-wide association studies have demonstrated a significant polygenic contribution to BD and MDD, where risk is attributed to the summation of many alleles of small effect.
This phenomenon is often attributed to "spurious inflation", and would be expected under polygenic architecture [ 35, 36].
As it is well known that hypertension is a complex, multifactorial, quantitative trait under a polygenic control, 30% to 50% of the variation in blood pressure between individuals is attributed to genetic factors, and the genes responsible for susceptibility and blood pressure variation are mostly unknown.
Thus, we attributed the observed inflation in our study to the presence of polygenic inheritance [ 35], since higher λ are obtained when the number of significantly associated SNPs is large.
In the computation of the genomic relationship matrix G*, attributing a weight (w) for pedigree-based relationships is equivalent to fitting residual polygenic effects that are not captured by the markers [ 21].
Calculate the phenotype for each individual i as y i = aq i + bu i + cε i, where a, b, and c are constants used to adjust relative contributions of each term to the total phenotypic variance, ensuring that the QTL accounts for v%, polygenic effects account for 50% (in HS) or 0% (in pre-CC), and the remainder is attributed to individual-specific noise.
These results indicated that the phenotypic difference between the two chicken lines may be attributed to many QTL each with small individual effects in concordance with the infinitesimal model for polygenic inheritance.
A polygenic theory of schizophrenia.
