Indian Society of Genetics & Plant Breeding

Genetic gain and morpho-physiological characterisation of BILs (Backcross inbred lines) under different moisture regimes in wheat (Triticum aestivum L.)

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Drought stress is one of the major yield limiting factors in

realising the full genetic potential of wheat. In the present

study, backcross inbred line population derived from

GW322*2/ HI1500 was characterized for different morphophysiological

traits and grain yield under rainfed and

irrigated conditions. Principal component analysis revealed

that first five components explained over 66.35 per cent of

variation. Grain yield showed significant correlation with

biomass and physiological traits viz., NDVI2, NDVI3, NDVI5,

CT2, CT3 and CT4. The analysis of variance on grain yield

data showed that mean squares of environments,

genotypes and GEI were highly significant (p<0.01). To

determine effects of GEI on grain yield, data were subjected

to AMMI and GGE biplot analysis, which identified BILs

G20, G2, G254, G214, G44 and G64 as the most stable and

high yielding. Based on Smith selection index expected

genetic gain for grain yield at 5% was 131.01gm/plot. Hence,

selecting genotypes based on morpho-physiological traits

will be rewarding under moisture depleting environment.

Keywords: Genetic gain, NDVI, CT, PCA, AMMI, GGE


Year: 2020
Volume: 80
Issue: 1
Article DOI: 10.31742/IJGPB.80.1.11
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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