horizontal resistancea situation where a large number of genes (POLYGENES) in the host plant confer a general level of resistance to a wide range of attacking organisms (pathogens or parasites). Such a system is usually able to withstand genetic changes in the attacking organism and thus produce stable production of crops. Compare RACE-SPECIFIC RESISTANCE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005