Effect of gamma radiation of macro mutations, effectiveness and efficiency under M2 generation in pea (Pisum sativum L.)
Journal Title: Annals of West University of Timisoara, ser. Biology - Year 2016, Vol 19, Issue 1
Abstract
The present investigation was undertaken to study the spectrum of macro mutants, effectiveness and efficiency of different doses of gamma rays in pea variety (Arkel). The seeds were treated with gamma rays viz., 00kR (dry control), 05kR, 10kR, 15kR, 20kR, 25kR, 30kR, 35kR, 40kR (dry seeds) and presoaked seeds of the same was exposed to 00kR (wet control), 05kR, 10kR, 15kR, 20kR (kilo Roentgen) biological damage was calculated in M1 and M2 generation based on lethality (L) and pollen sterility. The irradiated seeds were sown in the M1 field their respective controls and harvested in bulk to raise the M2 generation in Randomized Block Design (RBD) with three replications. The spectrum of macro mutants i.e., plant stature (tall, dwarf, small dwarf), maturity (early, late), pod shape (bold, long, short), seed colour (brown, light white, light green) and seed shape (small, bold, wrinkled) were observed in M2 generation. The usefulness of any mutagen in plant breeding depends not only on its effectiveness but also upon if efficiency. Mutagenic effectiveness is a measure of the frequency of mutations induced by unit mutagen dose, whereas mutagenic efficiency is measure of proportion of mutations in relation of undesirable changes like lethality and sterility are used for gamma rays. A result of the indicated positive relationship in M2 generation with macro mutation, effectiveness and efficiency was found to be highest at lowest doses.
Authors and Affiliations
Arvind KUMAR, A. K. CHAURASIA, S. MARKER, P. K. SHUKLA, Prashant K. RAI, Pankaj Verma, Bineeta M. BARA
Keywords
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