On maximal subgroups of the general linear group over rational functions field

We construct a class of the maximal subgroups of the general linear group $G = \mathrm{GL}(n,k(x))$ of degree $n$ over a field of the rational functions $k(x)$ with coefficients in a field $k$ of odd characteristic, containing non-split maximal torus associated with the radical extension of the basic field $k(x)$.