Indian Society of Genetics & Plant Breeding

Differential behaviour of polygenic characters to mutagenic treatments and selection in macrosperma lentil (Lens culinaris Medik.)

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Healthy seeds of a macrosperma lentil (Lens culinaris
Medik.) cv., Prevoz Selection, were treated with three
doses each of gamma rays, ethylene imine (EI) and Nnitroso-N-ethyl urea (NEU). All three mutagenized
populations (pooled over three doses of each mutagen)
showed increased variability over control for all the eight
polygenic characters studied in the M2 and M3. The
economically most important characters like pods and
seed yield/plant were not only highly mutable but also
showed increased variability in positive direction which
was exploited through effective selection. Despite similar
pattern of variability in M2 and M3 for all the traits, they
were not identical in the extent of change. The results
demonstrate that some characters, like pods and seed
yield/plant, have a tendency to stabilize sooner than others.
Therefore, selection for such characters can be confined
to M2 only as not much increase in variability and genetic
advance (GA) in M3 over M2 is observed.

Keywords: Induced polygenic variability, Lens culinaris, macrosperma. mutagens, selection


Year: 2001
Volume: 61
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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