Inheritance of field resistance to rust (Uromyces viciae fabae) in lentil

Inheritance of field resistance to rust (Uromyces vicia fabae) was studied in eight lentil genotypes viz., Markanday (EC 1), Vipasha (HPL5), Precoz, DPL 61, L 7107, IPL 131, IPL 138, and L 101. The F s from 1 the crosses of the test genotypes with highly susceptible cultivar L 830 were resistant, indicating that resistance was controlled by dominant genes. The F plants in crosses L 830 x L 101, Markandey x L 830, L 2 830 x Vipasha and Precoz x L 830 segregated into 15:1 resistant (R): susceptible (S) ratio inferring that resistance in genotypes L 101, Markandey, Vipasha, and Precoz was governed by two independent dominant genes. The F plant progenies from these crosses except L 830 x Vipasha segregated into 7 2-3 Homozygous Resistant (HR): 8 segregating (Seg): 1 Homozygous Susceptible (HS) ratio thereby, confirming the presence of two independently inherited dominant genes for resistance in genotypes L 101, Markandey and Precoz. In crosses, DPL 61 x L 830 and IPL 138 x L 830 the F plants segregated for rust 2 reaction into 3 R: 1 S and F plants segregated into 1 HR: 2 Seg.: 1 HS ratio, confirming the presence of a 2-3 single dominant gene for rust resistance in genotype DPL 61 and IPL 138. The F plants in cross L 830 x L 2 7107 segregated into 9 R: 7 S ratio and F plants segregated into 1 HR: 8 Seg. : 7 HS ratio showing that 2-3 resistance in L7107 was governed by two dominant complementary genes. Among the resistant x resistant crosses, no segregation was recorded in most of the crosses involving parents, Precoz, DPL 61, L 7107, IPL 131, IPL 138, and L 101 indicating that one or more resistance genes in these genotypes were common However, crosses Markandey x Precoz, Markandey x IPL 131, Markandeyx L 7107 segregated for resistance and susceptibility, indicating that resistance in genotype Markanday (EC 1), was governed by different genes..