Chemical fungicide seed treatments have kept common bunt outbreaks to a minimum, but alternative controls are nonetheless worth exploring should, for example, the chemical lose its effectiveness or be discontinued.
In field trials conducted since 2006, treating seed or soil with a ground-rye-grain formulation of Muscodor completely prevented common bunt under moderate disease conditions.
AC Ultima was very resistant to the prevalent races of stem rust, leaf rust, and common bunt
, and moderately resistant to common root rot.
3] families segregating for resistance to diseases such as common bunt of wheat is difficult to interpret because of disease escapes and incomplete expression of the genes being tested.
The objective of this study was to determine the pattern of inheritance of common bunt resistance from SC8021V2 and L8474D1 in random inbred lines and androgenetically derived doubled haploid lines.
L8474D1 (a sib of `AC Taber') a medium hard red spring wheat was derived from a line known to possess the dominant common bunt resistance gene BT10 (Knox et al.
Spores of common bunt were inoculated onto the seed by shaking the seed and spores in a Petri plate for at least 10 s.
Common bunt reactions of parents (Table 2) indicated the minimum 16 plants tested from each line (Table 1) was adequate for discriminating between resistant and susceptible classes.
Holton and Heald (1941) reviewed the literature on the genetics of common bunt prior to 1941 and they noted studies in which the inheritance of resistance was dominant, recessive, or intermediate.
Many examples of major gene segregation for resistance to common bunt are known (Holton and Heald, 1941; Stanford, 1941; Schaller et al.
The results point to the segregation of a single major gene for common bunt resistance in L8474D1.
Single major partially dominant genes explain the segregation of resistance to common bunt race T19 in L8474D1 and SC8021V2 when crossed with HY377, with the possibility of at least one modifier gene in SC8021V2.