Resistance evaluation of different inbreds and hybrids of sunflower to broomrape (Orobanche cumana wallr.)

Abstract

Resistance to broomrape of different inbred lines, hybrids and hybrid combinations of sunflower was investigated. The trial for this experiment, which was set at 6 locations on territory of Bačka, included set of differential genotypes which, according to literature, posess genes for resistance to races A-E, 152 inbred and 121 restorer lines developed at the Institute of Field and Vegetable Crops in Novi Sad, 72 crosses between these lines and 15 Russian and Ukrainian varieties. Differential genotypes behaved identically in all test sites. Domestic mother lines, restorer lines, newly developed hybrids as well as hybrid combinations showed resistance to present races of broomrape in all test sites in Vojvodina. Determination of resistance genes requires analysis of crossing inbred lines and differential lines. Results of the experiment performed in Romania and Turkey, with part of the experimental material, shows that these genotypes behaved differently in terms of resistance to broomrape in different conditions for experiments. The results require further separation on the basis of resistance to different races of the parasite by introducing new differential line.

Ispitivana je otpornost na volovod različitih inbred linija, hibrida i hibridnih kombinacija suncokreta. Ogled za ovaj eksperiment, koji je postavljen na 6 lokacija na teritoriji Bačke, uključio je set diferencijalnih genotipova koji, prema literaturi, imaju gene za otpornost prema rasama A-E, 152 i 121 samooplodne restorer linije stvorene u Institutu za ratarstvo i povrtarstvo, Novi Sad, 72 ukrštanja ovih linija i 15 ruskih i ukrajinskih sorti. Diferencijalni genotipovi su se ponašali identično u svim ispitivanim lokacijama. Domaće linije majke, restorer linije, novorazvijeni hibridi, kao i hibridne kombinacije su pokazali otpornost na prisutne rase volovoda u svim ispitivanim lokacijama na teritoriji Vojvodine. Određivanje gena otpornosti zahteva analizu ukrštanja inbred linija i diferencijalnih linija. Rezultati ogleda izvedenog u Rumuniji i Turskoj sa delom eksperimentalnog materijala pokazuju da su se ovi genotipovi različito ponašali u pogledu otpornosti na volovod u različitim uslovima izvođenja ogleda. Rezultati nalažu dalje razdvajanje na osnovu otpornosti na različite rase volovoda uvođenjem novih diferencijalnih linija.