Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XX
Written by Gabriel Florin ANTON, Maria JOITA-PACUREANU, Călina Petruţa CORNEA
Sunflower broomrape (Orobanche cumana Wallr.) is causing a great deal of damage to sunflower production in many countries in Europe as well as in countries from Asia and in Australia. Extensive research on sunflower resistance to broomrape has been conducted in Russia, Romania, Bulgaria, Turkey, Serbia and Spain. New races of the parasite appear frequently. Sunflower breeders have been trying to develop sunflower genotypes resistant to all known races of this parasite. In our research work regarding resistance to broomrape we have used different sources of resistance, the best ones being the sunflower wild species. For obtaining results presented in this paper there have been used six cultivated sunflower genotypes which were crossed with two sunflower wild species, in order to obtain some populations. These populations are used for obtaining sunflower inbred lines which can to be used as sources of resistance (donor of genes) or directly to obtain hybrids. There have been studied the interspecific hybrids as well as the parental forms, for the number of released seeds, for oil content, one thousand seed weight and resistance to different populations of broomrape parasite, in the artificial and natural infestation conditions. We identified some populations full resistant to the most virulent races of broomrape in sunflower crop in Romania.
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