In an $\mathrm{SU}\left(3\right)\mathrm{}$-symmetric quark model, the production of vector mesons in high-energy $\mathrm{PN}\to \mathrm{VB}$ collisions is investigated in the crossed $t$ channel. We assume that the physical baryon octet is given by $8\left(\mathrm{physical}\right)=8^{\prime }cos\theta +8\mathrm{}sin\theta$, where 8 and 8′ octets arise from $3\otimes \overline{3}$ and 3 ⊗ 6, respectively. It is found that the value $\theta =20\mathrm{}°$, which leads to predictions in reasonable agreement with the available data on high-energy meson-baryon scattering and the photoproduction of pseudoscalar mesons, is also consistent with the available data on vector-meson production. Also, independently of the mixing angle $\theta$, a number of sum rules are obtained.

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