Incorporating the social environment in genotype environment interaction studies of mental disorders

Incorporating the social environment in genotype environment interaction studies of mental disorders.

In 2003, Caspi et al. (2) published a groundbreaking article which found that a common variable number of tandem repeats polymorphism in the promoter region of the serotonin transporter gene (SLC6A4), designated as 5-HTTLPR, moderated the relation between stressful life events and depression. Specifically, individuals possessing one or two copies of the short (s) 5-HTTLPR allele that is less tr...

Genotype x environment interaction in the regional testing of safflower cultivars

Genotype - - Environment Interaction

T HE experiment involved 48 pairs of male Holstein fraternal twin calves. Two methods of raising calves were contrasted: (A) High fat (20%) and protein (20%) vealer ration fed from 3 days of age to a market weight of 128 kilograms. (B) The same vealer was fed up to a live weight of 56.7 kg, followed by pelleted grain mixture fed ad libitum and hay offered to a maximum of 0.9 kg per day. Twin pa...

Stability Analysis of Genotype × Environment Interaction Effect on Sugar Yield in Sugar Beet Hybrids

   Testing plant varieties under different regions is necessary to assess their stability. In this study, 17 sugar beet genotypes were evaluated in a randomized complete block design with six replications in five regions including Karaj, Hamedan, Miandoab, Mashhad, and Shiraz. After checking the homogeneity of mean squares in five experiments by Bartlett’s test, analysis of the combined was per...

From Genotype × Environment Interaction to Gene × Environment Interaction

Historically in plant breeding a large number of statistical models has been developed and used for studying genotype × environment interaction. These models have helped plant breeders to assess the stability of economically important traits and to predict the performance of newly developed genotypes evaluated under varying environmental conditions. In the last decade, the use of relatively low...