The phrase "a very narrow selection" is correct and usable in written English.
It can be used to describe a limited range of options or choices available in a particular context.
Example: "The store offers a very narrow selection of organic products, making it difficult for health-conscious shoppers to find what they need."
Alternatives: "a limited range" or "a small variety".
In research conducted with the Robert Wood Johnson Foundation, Dr. Polsky found that 41percentt of silver plans offered a "narrow or very narrow" selection of doctors, meaning at best 25percentt of physicians in an area were included.
Theoretical work has shown that GR will be selected for only in a very narrow range of stabilizing selection pressures; and within this restricted range, selection for ER will be relatively weak compared to a higher level of stabilizing selection (for an illustration of this see Figure 9 of [3]).
In highly outcrossing, equilibrium species, recombination events will limit the signal of balancing selection to a very narrow region surrounding the selected site [ 52], whereas we expect a more extended elevation of diversity in selfing species, creating a much greater difference between regions under balancing selection and the genomic average.
Most of agromyzids studied thus far have shown a very narrow range of host plant selection, i.e., only five species, and are considered truly polyphagous [17] [18].
Again, these observations suggest the existence of a common and small founding population with very limited haplotype diversity and/or a very narrow genetic bottleneck before inbred strain selection.
Cultivated sunflower was selected from a very narrow genetic base.
If formulation has a very narrow end point window or potential stability issue due to moisture exposure, selection of a process using fluid-bed granulation may be of benefit.
Upland cotton has a very narrow genetic base due to multiple bottleneck events including, polyploidization, domestication and continuous selection.
All banana export cultivars grown today are, however, selections from somatic mutants of the group Cavendish and have a very narrow genetic base, while smallholders in sub-Saharan Africa, tropical Asia and Latin America use some bred-hybrids (mostly cooking types).
But that is a very narrow part.
