is an active metabolic process dependent upon cultivar
genetics (Terry Haig, personal communication). Copaja
et al. (1991) screened 52 Chilean cultivars of T. aestivum
and T. durum, and found that DIMBOA amount varied
from 1.4 to 10.9mmol/kg fresh weight. DIMBOA
amount was found to be maximum in T. speltoides
(16mmol/kg fresh weight) and least in T. tauschii (Coss.)
Schmalh (0.21mmol/kg fresh weight). While both
monogenic and polygenic controls were suggested for
the accumulation of DIMBOA in maize, the allelo-
chemical gramine is suggested to be synthesized in the
presence of double-recessive genes (mmtt).