نتایج جستجو برای: genotype main effect
تعداد نتایج: 2231371 فیلتر نتایج به سال:
Little agreement exists as to acute dopamine (DA) manipulation effects on intertemporal choice in humans. We previously found that catechol-O-methyltransferase (COMT) Val158Met genotype predicts individual differences in immediate reward selection bias among adults. Moreover, we and others have shown that the relationship between COMT genotype and immediate reward bias is inverted in adolescent...
Genes of the major histocompatibility complex (MHC) form a vital part of the vertebrate immune system and play a major role in pathogen resistance. The extremely high levels of polymorphism observed at the MHC are hypothesised to be driven by pathogen-mediated selection. Although the exact nature of selection remains unclear, three main hypotheses have been put forward; heterozygote advantage, ...
In a crop breeding program, multiple-location trials can be used to define target regions and mega-environments that, in turn, will help the breeder develop stable cultivars. In addition, locations can be chosen that are efficient for distinguishing among cultivars (genotypes) and that are good representatives of the target regions. The objectives of this study were to study mega-environments a...
Assessment of the stability and adaptability of a genotype to different environments is useful for recommending cultivars for known conditions and is one of the requirements in plant breeding programs. Considering the inherent climatic diversity in Iran, recognition of genotype by environment interaction is important. In this study ten oat (Avena sativa L.) genotypes were tested at six environm...
We sought to replicate previous studies reporting a moderating effect of the 5HTT gene on the association between trait neuroticism and smoking behaviour, and extend on this work by including a formal test of this interaction, in a sample of 141 heavy smokers. Nicotine dependence was measured using the Fagerström Test for Nicotine Dependence; trait neuroticism was assessed using the Eysenck Per...
Recent studies have identified DAAO as a probable susceptibility gene for schizophrenia and bipolar disorder. However, little is known about how this gene affects brain function to increase vulnerability to these disorders. We examined the impact of DAAO genotype (rs3918346) on brain function in patients with schizophrenia, patients with bipolar I disorder and healthy controls. We tested the hy...
In order to find the high-yielding and adaptable cultivars in different environments, eight cotton genotypes including two early maturity hybrids were studied and compared with the Varamin cultivar as control in a randomized complete block design with four replications in six regions in 1997 and 1998. Using Barttlet test, some of the environments were eliminated from statistical analysis. There...
In this research, the possibility of applying selection index of ideal genotype (SIIG) technique for identify tolerate genotypes using the different drought tolerance indices be amended. The experiment was conducted as split plot based on randomized complete block design with three replications at the experimental farm of agricultural research institute and natural resources, Yazd, Iran in 2011...
Maize ranks first among worldwide production and an important source of human animal feed. Its can be affected by management practices climatic conditions. The objective this study was to estimate stability yield hundred grains weight six maize genotypes during two growing seasons at locations, subjected four different treatments: T1 treatment—without herbicide, Control; T2 treatment—active sub...
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