Crops resistant to economically important diseases such as fusarium wilt, rust and Ascochyta blight are essential for agricultural production. Identification of resistant plants is now faster and more reliable. The use of biotechnological methods, especially molecular markers based on PCR, enables the analysis of the genome and thus the presence of genes for disease resistance. Markers that differentiate between genotypes based on DNA polymorphisms serve as indicators of a resistance gene when located in its immediate vicinity. Wilt resistance in lentil (Lens culinaris Medik.) is caused by the Fw gene. The latter has a RAPD marker OP-K158900 in the proximity of 10,8 cM. A stronger association was detected with SSR marker SSR59-2B and AFLP marker p17m30710 at distances of 8,0 and 3,5 cM, respectively. Rust resistance is regulated by the R gene, which is flanked by two SSR markers LcSSR606 and LcSSR440 at distances 8,3 and 8,2 cM, respectively. Resistance to rust and wilt is determined by a dominant gene, in contrast to blight, which has two known dominant genes that determine resistance. Ascochyta blight has two RAPD markers, RB18 and RV01, near the AbR1 gene of 14 and 6 cM, respectively. Ral2 is another dominant gene, while ral2 is recessive.
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