Respuesta :
The phenotypic and genetic variance in morphological features (thorax length, wing length, number of sternopleural and abdominal bristles, and number of arista branches) was investigated in Drosophila melanogaster in relation to temperature, diet, and density stressors.
Additionally, the impact of stress on the stability of bilateral characteristics' fluctuation asymmetries was examined.
It has been demonstrated that all pressures lead to an increase in phenotypic variance and variable bilateral trait asymmetry. Under stressful circumstances, genetic diversity of morphometric features evaluated using the isofemale line approach was greater than under regular circumstances.
The impact of biotic and abiotic pressures on genetic and phenotypic diversity was comparable. Stress typically had a greater impact on morphometric trait variability than it did on meristic trait variability.
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