The Indian Journal of Genetics and Plant Breeding

Inheritance of rust resistance in lentil was studied based on analysis of 23 crosses involving 8 resistant and 10 susceptible genotypes. The crosses were made in three possible combinations, viz., resistant x susceptible, resistant x resistant and susceptible x susceptible types. The F2 segregation analysis of 14 out of 15 crosses involving resistant x susceptible parents revealed that resistance was governed by a single dominant gene. The F₂ analysis of the cross Lens 4076 x DPL 21, revealed that resistance in the variety DPL 21 was under monogenic recessive control. Analysis of three crosses involving only resistant parents indicated that genotype Precoz has a dominant gene for resistance at different locus to that of Pant L 4. The crosses among susceptible parents revealed susceptibility as noncomplementative. The gene symbol Urf₁ has been proposed for rust resistance in the genotypes Precoz and Lens 4603 and url₂. in the varieties Pant L 4 and Lens 4147. The gene symbol ur₆, Urf₃ has been proposed in variety DPL 21, where resistance was conferred by monogenic recessive gene.