Effect of mutagens on character association and selection response in mutagenised populations of Grasspea (Lathyrus sativus l.)

Author: 
Swapan K. Tripathy, Chinmayee Behera, Monalisha Jena, Somanath Panda, Pavitra Mohan Mohapatra, Sasmita Dash, Susanta Kumar Mohanty and Dayanidhi Mishra
Abstract: 

Character association and component analysis at genotypic level were studied in mutagenised populations (M2) of grasspea land race “Dhenkanal local” following seed treatment with gamma-rays, EMS, NG and their combinations. Seeds/plant emerged as an independent direct yield contributing trait in all treatments except 40kR gamma-rays + 0.2% EMS. In general, number of branches/plant, pods/plant and seeds/plant exhibited very high and significant positive association with seed yield/plant. High correlation of 100-seed weight accompanied by its high direct effect on seed yield in 70kR gamma-rays, 0.03% NG and 40kR gamma-rays revealed breakage of undesirable linkage of this trait with seed yield. Negative association of plant height with seed yield in 0.2% EMS also provided a scope for selection of dwarf plant type coupled with high seed yield.

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   Vol. 07, Issue 01, January 2017

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