Author(s):

Anisa M Nimbal and Rudra V Naik

Abstract: The present investigation was carried out with the main objective of estimating the extent of genetic variability released through recombination, induced mutation and their combination for yield and its component traits in ten segregating populations of bread wheat. The material consisted of segregating populations (F₂, M₂ and F₂M₂) developed from two bread wheat varieties viz., GW322 and UASBW11949 after irradiating with gamma-rays. Higher mean and wider range was recorded for grain yield per plant and other traits in F₂M₂ compared to F_2. Higher genotypic and phenotypic coefficient of variance was observed in F₂M₂ population for plant height, spikelets per spike, grains per spike, productive tillers per plant, spike length and 1000 seed weight indicating greater scope for selection and improvement of the characters in desired direction. The estimates of heritability, GA and GAM were increased from F₂ to F₂M₂ revealing possibility of getting more success by selecting in F₂M₂ compared to F₂ population.

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