Primary spheres derived from the cochlear spiral ganglion with a solid morphological population were produced after 7 DIV.
Genetic (mtDNA) and morphological distances among populations were highly correlated in sharp-snouted lenok (Mantel's r = 0.75, P < 0.001) but weakly correlated in blunt-snouted lenok (Mantel's r = 0.36, P = 0.014).
The morphological characters of all populations were measured in three replicates, and the mean value was used for the analysis.
Given that populations have diverged at a genetic level, we can also expect divergence at a morphological level (although the same populations were not compared for molecular and morphological analyses in this study).
Accordingly, different morphological characteristics of these five populations were observed.
According to the cluster analysis on both morphological and molecular markers, 25 populations were classified into 5 clusters, but the population intra-groups were different.
Species of the isolated populations were identified using morphological and molecular tools (Nguyen, 2007).
Inland populations were larger, on average, and showed greater morphological variation than coastal populations.
Morphological variation among populations was assessed through the measurement of fitness-related traits.
Understanding the causes underlying morphological differences between populations is a fundamental question in evolutionary biology.
