Genetic architecture of F2 and identified transgressive segregants for yield and its component traits in bread wheat (Triticum aestivum L.)

Two crosses of bread wheat viz., K 1006 x LOK 1 and PBW 343 HUW 234 were investigated to explore the useful variability parameters, correlation along with inheritance study (skewness kurtosis) in segregating F2 F3 population for yield its component traits respectively. Narrow difference between phenotype genotype coefficient variation showed less influence environment on expression under investigation. High heritability coupled high genetic advance as per cent mean (GAM) registered segregants both majority characters. Among identified transgressive it was higher most like Grain filling duration (GFD), Spike length (SPL), Awn (AL),  Peduncle (PL), Plant height (PLH), No. spikelet’s spike (SLPS), Net effective tiller (NET), Area SPAD decline curve (AUSDC)  in generation depicting predominance additive gene action, followed by selection progeny testing that can be utilized improving these traits. Significance sum square  for among indicated presence adequate amount plants. plant-1 significant positive NET, SPL, PLH, SLPS, GPS revealed leads increase overall productivity crop. Inheritance a negatively skewed Platykurtic distribution (1000 grain weight, AL, PL, DM, GFD AUSDC) governed many genes exhibiting dominant based duplicate epistasis population. Similarly, positively GYPP, GPS, DF suggested large number showing complementary epistasis. Hence, intense is required rapid gain. studies are more powerful than first second-degree statistics which disclosed interaction effects. Keywords: Wheat, Skewness, Kurtosis, Transgressive Segregants, Variation, Correlation.