Do uniform selection as a primary force reducing population genetic differentiation of cavitation resistance across a species range?
In contrast to growth and carbon isotope composition, no population differentiation was found for cavitation resistance. Heritability was higher than for the other traits, with a low additive genetic variance (h(2) (ns) = 0.43±0.18, CV(A) = 4.4%). Q(ST) was significantly lower than F(ST), indicating uniform selection for P(50), rather than genetic drift. Putative mechanisms underlying Q(ST)<F(ST) are discussed.
Liver stiffness measurement allows to predict the presence of large oesophageal varices in patients with cirrhosis, and may help to select patients for endoscopic screening.