Evaluation of resistance of new sunflower hybrids to broomrape in the breeding programs in Novi Sad

Abstract

Broomrape (Orobanche cumana Wallr.) presents a serious problem in sunflower production in a number of countries, it reduces sunflower seed yield and negatively affects other sunflower traits in sunflower production. Continued work on creating new sunflower hybrids resistant to broomrape requires testing of breeding materials in both field conditions and controlled conditions of a greenhouse. The best solution is to do the testing simultaneously in order to verify the congruence of the evaluation of the broomrape resistance achieved by these two methods. The screening of chosen new 15 sunflower hybrids for broomrape resistance was done in 2009 and 2010 in infected field on two locations in Vojvodina Province and in 2010 in greenhouse. Both field and the greenhouse tests rated the hybrids exclusively on the basis of presence or absence of the parasite. The infection of hybrids with broomrape has shown that out of 15 hybrids tested, 9 hybrids were resistant. These hybrids were fully resistant in both years in field conditions and controlled greenhouse conditions during one year. Fully resistant hybrids in field conditions and in greenhouse conditions NS-H-6385 and NS-H-6396 had significantly higher seed yield, seed oil content and oil yield in relation to standard.