Abstract
Dry and dormant seeds (10% moisture) of Lathyrus sativus L. var. P10, P24, P288, P293, P585 and LC76 were irradiated with 10, 20, 30, 40 and 50 kR gamma rays. Both control and irradiated seeds of variety P288 was treated with 0.2 MES for six hours. Albino, Xantha, Albo-Xantha, Xanthalba, Albo-viridis, Virescence, Chlorina, Albescence, Tigrina and Maculata were the general types of chlorohyll mutations observed in all the six varieties at M2 generations.
The spectrum of chlorophyll mutations was found to be dependent on the nature of genotypes. This was further noted to have linear relationship with doses. Maximum chlorohyll mutations were observed in LC76 which was proved to be more sensitive than rest of other varieties.
High frequency of mutations was recorded in P288 as a result of differential and combined treatment of 0.2% MES which was seen to be as effective as 20 kR gamma rays.
