Sjemenarstvo, Vol. 16 No. 1-2, 1999.
Izlaganje sa skupa
EVALUATION OF WHEAT RESISTANCE TO FUSARIUM HEAD BLIGHT (Fusarium graminearum Schw.) THROUGH GRATN YIELD PER PLANT UNDER THE CONDITIONS OF ARTIFICIAL AND NATURAL INFECTION
Slobodan Tomasović
; Bc Institut za oplemenjivanje i proizvodnju bilja d.d.,Zavod za strne žitarice i krmno bilje, Zagreb, Hrvatska
Sažetak
Aware of the fact to what extent possible diseases can affect grain yield of wheat and in order to preserve high-yield stability, Bc Institute has focused its breeding programs oh developing high-yielding varieties with satisfactory grain and flour quality, as well as genetic resistance to the most important diseases like black stem rust, powdery mildew, and more recently to septoria and especially to fusarium on spikes. The program of incorporating wheat resistance to fusarium head blight is very complex, because it means dealing with a facultative parasite. Under favourable conditions for its growth and development, it can cause considerable damages. ln breeding for resistance to Fusarium graminearum Schw. (more recently also to Fusarium moniliforme var. subglutinans) tests were made with lines derived from mutually crossed sources of resistance. The lines were tested both in natural and artificial conditions (Fusarium nursery). Grain yield per plant is a complex wheat characteridtic and is the result of a number of influencing factors. How much damage Fusarium graminearum may cause in a certain wheat growing region is difficult to determine precisely without conducting exact field trials. Effect of Fusarium graminearum on fulfill yield capacity was estimated on the basis of resistance of initial sources of resistance and their crosses. Yield reduction may be achieved if severe infection is duplicated after applying artificial infection in adequate climatic conditions. ln our investigations it was successful. Initial sources of resistance (parents) were compared for resistance to Fusarium graminearum Schw. with their single and double crosses from F₁ and F₁ x F₁ generations in two field trials in artificial and natural (control) infection.
Ključne riječi
Fusarium graminearum Schw.; Fusarium moniliforme var. subglutinans; wheat breeding; evaluation of resistance; grain yield per plant; field trials; artificial and natural infection
Hrčak ID:
168174
URI
Datum izdavanja:
23.3.1999.
Posjeta: 655 *