Heritability and Genetic Causation

Heritability and genetic advance in rapeseed (Brassica napus L.)

The present study was carried out to estimate genetic variability parameters for some traits such as pods per plant, cell membrane stability, one thousand kernel weight, flowering period, grain filling period, chlorophyll content, relative water content, leaf excised water content, seed per pod and pod length, in 16 winter rapeseed genotypes. Statistical analysis showed significant differences ...

Causal control and genetic causation

The mystery of missing heritability: Genetic interactions create phantom heritability.

Human genetics has been haunted by the mystery of "missing heritability" of common traits. Although studies have discovered >1,200 variants associated with common diseases and traits, these variants typically appear to explain only a minority of the heritability. The proportion of heritability explained by a set of variants is the ratio of (i) the heritability due to these variants (numerator),...

Genetic Specificity of Linguistic Heritability*

The most common method used to study the role of genetic factors for in development is to determine whether monozygotic (MZ) cotwins are linguistically more similar to one another than dizygotic (DZ) cotwins. Because MZ and DZ cotwins share essentially the same preand postnatal environment, whereas MZ cotwins share 100% of their DNA and DZ cotwins share only 50% of their DNA, if MZ cotwins are ...

Genetic Epidemiology and Heritability of Vitiligo

1.1 Prevalence & incidence The population prevalence of vitiligo ranges from 0.1% to 2% and shows a wide variability among ethnic groups (Bolognia et al., 1998; Hann and Nordlund, 2000). Whereas the estimated population prevalence of vitiligo is approximately 0.38% for Caucasians in the United States and Northern Europe (Howitz et al., 1977), vitiligo affects 0.19% of the population in China (X...