Comparison of Bread Wheat Genotypes for Leaf Rust Resistance Genes

Abstract

Leaf rust caused by Pucinia recondita tritici is one of themost important diseases of bread wheat worldwide. It isconsidered that the most environmentally sound; low costmethod of controlling leaf rust is to breed and growgenetically resistant wheat varieties. In the research, twentyfour bread wheat varieties grown intensively were used asgenetic material in Trakya Region where the North-West Partof Turkey. To create artificial leaf rust epidemic in fieldconditions, two sensitive varieties (Morrocco andCumhuriyet 75) was sown after each ten genotypes, and thereactions of the varieties to leaf rust were investigated in fieldconditions. Isogenic lines carrying the genes Lr9, Lr14, Lr19,Lr24 and Lr47 from CIMMYT were used as controlgenotypes in molecular analysis.In the field conditions, although Pehlivan, Selimiye,Sagittario, Tina, Anapo, Montchill and Saraybosna were themost sensitive genotypes, Nota, Kate A1, Prostor and Sanawere the most resistant bread wheat varieties to leaf rust. Itwas determined that Sana, Pehlivan, Golia, Falmura 85,Saroz 95, Renan, Sirena, Kate A1, Selimiye, Bezostoja 1,Saraybosna, Nina and Tina varieties have Lr9 gene with SSRanalysis. It has been observed that all bread wheat varietiescarry Lr14, Lr19, Lr24 and Lr47 (except Krasunia, Aldaneand Gelibolu varieties) genes.It is revealed that Lr9 and Lr47 genes should be takeninto consideration in the studies to be performed in the regionand these genes will be useful to examine together with alarger number of leaf rust genes for more successful resultsin breeding studies.