Because higher heritability traits are more responsive to selection than low heritability traits, these high heritabilities indicate that selection for the more predominant provitamin A compounds should be effective.
Under negative selection, i.e. in the opposite direction of the pathway effect, only null mutant alleles or repressors at upstream regulatory loci are responsive to selection and significant amounts of allelic diversity will remain at downstream loci.
Since ROS levels are important to cell growth, the possibility exists that ROS modulation has been responsive to selection pressure.
As early as generation 7 of selection, we learned that peripheral changes associated with a higher transfer of O2 within skeletal muscle were most responsive to selection and accounted for a large part of the initial divergence in endurance running capacity (7) between the low capacity runner (LCR) and high capacity runner (HCR) rats.
However, there are about 20 races of maize in the highlands of Mexico (Wellhausen et al. 1952; Sanchez et al. 2000) and we do not know if all these races would have similar problems responding to warmer conditions, or if some could be more plastic or responsive to selection.
Population size has been invoked to be one key variable for the possibility of evolutionary rescue (ER) of populations under changing environments, either by determining the amount of quantitative genetic variation responsive to selection, or indirectly via inbreeding effects (Willi et al. 2006).
Analyses of haplotype and nucleotide diversity based on 50 rice accessions which included improved cultivars, landraces, and wild species were conducted to reveal if the gene has been responsive to artificial selection and the associated geographic distribution of its alleles.
Additionally, insertion of a TE into a single Hsp70 promoter creates allelic variation that is apparently responsive to positive selection [12], [15].
The anterior part of the l-VLPFC (roughly coextensive with the left IFG-orbitalis) is thought to be involved in controlled lexical retrieval, whereas the left mid-VLPFC (∼IFG-triangularis) is thought to be responsive to postretrieval selection demands, or alternatively demands on cognitive control (Kan and Thompson-Schill 2004; Badre and Wagner 2007; Schnur et al. 2009).
The paper also gives measured on-street public transport benefits which have arisen from using a simple rule-based (traffic-responsive) signal plan selection system, compared with a time-tabled signal plan selection system.
As vendors start shipping smaller quantities and being less responsive, the inventory and selection at Sears stores is going to get even worse than it already is.
