INDUCED MUTATIONS IN CHICKPEA (CICER ARIETINUM L.) II. FREQUENCY AND SPECTRUM OF CHLOROPHYLL MUTATIONS

Abstract

A comparative study of frequency and spectrum of chlorophyll mutations induced by two physical (gamma rays, fast neutrons) and two chemical mutagens (NMU, EMS) in relation to the effects in Ml plants and induction of mutations in M2 was made in four chickpea (Cicer arietinum 1.) varieties, two desi (G 130 and H 214) one Kabuli (C104) and one green seeded (L 345). The treatments included three doses each of gamma rays (400, 500 and 600 Gy) and fast neutrons (5, 10 and 15 Gy) and two concentrations with two different durations of two chemical mutagens, N'MU [0.01% (20h), and 0.02% (8h») and EMS [0.1% (20h) and 0.2% (8h»). The frequencies and spectrum of three different kinds of induced chlorophyll mutations in the order albina (43.5%), chlorina (27.3%) and xantha (24.2%) were recorded. Chemical mutagens were found to be efficient in inducing chlorophyll mutations in chickpea. Highest frequency of mutations was observed in green seeded var. L 345 (83% of Ml families and 19.9/1000 M2 plants). Kabuli var. C 104 was least responsive for chlorophyll mutations.