SVIBOR - Project code: 4-01-054

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 4-01-054


INVESTIGATION OF MAJOR DISEASES IN WINTER WHEAT BREEDING


Main researcher: KORIĆ, BOGDAN (75016)



Assistants
Type of research: basic
Duration from: 01/01/91. to 12/31/94.

Papers on project (total): 25
Papers on project quoted in Current Contents: 5
Institution name: B.C.Institut za oplemenjivanje i proizvodnju bilja, Zagreb (106)
Department/Institute: Department of Cereal Crops
Address: Marulićev trg 5/I
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0) 41 459-200
Fax: 385 (0) 41 446-645

Summary: The program comprises identification of the fungi Erysiphe graminis f.sp. tritici, Puccinia graminis f.sp. tritici and isolates of the fungi Leptosphaeria nodorum and Fusarium graminearum, the causal agents of powdery mildew, black stem rust, glume blotch and scab in wheat. The obtained pathotypes and isolates are further investigated to determine their formula of virlence, which determines the level of resistance of the selected wheat genotypes of both domestic and foreign origin, as well as of the material obtained from breeding program for resistance and level of resistance of the improved sources of resistance. These sources of resistance obtained from preliminary breeding program will serve for further breeding aimed at developing high-yielding wheat varieties resistant to the above causal agents.

Keywords: winter wheat, powdery mildew, septoria nodorum blotch, stem rust, scab, pathotypes, isolates, sources of resistance, virulence/avirulence

Research goals: The aim of the investigation is to determine the prevailing pathotypes of the fungi Erysiphe graminis f.sp. tritici and Puccinia graminis f.sp. tritici using adequate testing. Based on the identified pathotypes, their virulence or avirulence will be tested. This investigation is also aimed at identifying isolates of the fungi Leptosphaeria nodorum and Fusarium graminearum and determining the formula for Leptosphaeria nodorum virulence. By testing genotypes of local and foreign origin find sources of resistance, which, along with resistance to the above diseases, also incorporate other favourable genetic and economic traits suited to our wheat growing conditions. Through succesive crossing, resistance level of the obtained sources of resistance to powdery mildew and glume blotch in particular will be increased. The improved sources of resistnace thus obtained in so called preliminary breeding will serve in breeding for developing wheat varieties with desired resistance. The result of the investigation would be stable and high wheat production with reduced usage of fungicide in chemical control. This will not only reduce production costs, but will also preserve the environment from pollution. The end goal and success of the investigation is producton of ecologically healthy food. What has been accomplished so far is identification of pathotypes, determination of their virulence and resistance genes that controle the prevailing pathotypes. By investigating the virulence of individual isolates, inoculum for artificial infection was produced, which serves for testing breeding material and world sources of resistance. Consequently, selection of the best wheat genotypes for further breeding work is thus enhanced.


COOPERATION - INSTITUTIONS


  1. Name of institution: Research Institute for Plant Protection
    Type of institution: University/Faculty
    City: 6700 AC - Wageningen, Nizozemska

  2. Name of institution: European Yellow Rust Nursery
    Type of institution: University/Faculty
    City: 6700 AC - Wageningen, Nizozemska

  3. Name of institution: International Center for Agricultural Research in the Dry Areas (ICARDA)
    Type of institution: State administration
    City: Aleppo, Sirija

  4. Name of institution: El Centro Inernacional de Mejoramiento del Maiz y delTrigo (CIMMYT)
    Type of institution: State administration
    City: Mexico, Mexico

  5. Name of institution: International Winter Wheat Powdery Mildew Nursery (IWWPMN)
    Type of institution: Economical/Production
    City: Raleigh, North Carolina, SAD

  6. Name of institution: International Winter Wheat Septoria Nodorum Nursery, (IWWSNN)
    Type of institution: Economical/Production
    City: Boseman, Montana, SAD

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Last update: 11/07/95
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