The centre of origin for brinjal is not clear. However, the maximum varietal distribution of brinjal may be observed in South and South East Asia. Researchers have studied brinjal crossing behaviour and Bt brinjal behaves in a similar fashion. It does not show any changes in its pollen dispersal or crossability than has been reported in conventional brinjal. As the cry1-Ac gene does not confer any change in plant habit or behaviour, it will have no impact on diversity.