Natural selection occurs because individuals having more-useful traits, such as more-acute vision or swifter legs, survive better and produce more progeny than individuals with less-favourable traits.
Perhaps ANN maybe more useful for functional traits (or traits were e.g., epistasis is present) than for milk traits, which seem to behave additively and can be predicted well with linear methods.
For example the RAND health perceptions questionnaire [ 22] which contains 33 questions in 6 sub-scales, has shown high stability over time, suggesting that it may be more useful as a trait indicator than an outcome measure that is responsive to change [ 22].
EST-SSR also have a higher probability of being in linkage disequilibrium with genes/QTLs controlling economic traits, making them more useful in studies involving marker-trait association, QTL mapping and genetic diversity analysis [ 9].
One approach may be to examine whether narrow, i.e., lower-order personality traits may be more useful than their underlying, broad personality trait dimensions.
Gene-based markers are more useful in mapping of quantitative trait loci (QTL), molecular breeding, and gene cloning.
In answer to our main research question – which of two levels of personality traits may be more useful as markers of different subgroups of suicide attempters- we identified both qualitative and quantitative differences.
Through intentional hybridization, breeders could combine useful traits from two or more sources in one individual plant in one or more generations.
Hierarchical measurement of latent traits, such as HRQoL, is more useful than simply summing item scores and using the total score alone.
One trait will be more useful than the other when Elena lands a job as a live-in aide to Cindy and Jim (played by Cindy Silver, the director's mother, and Jim Chiros), dueling spouses who need help caring for Jim's mother.
