Development of Improved Mutants for Grain Yield and Related Traits in Finger Millet (Eleusine coracana L Gaertn.) Through Gamma Mutagenesis
K. N. Ganapathy, T. S. S. K. Patro, K. B. Palanna, I. K. Das, M. Elangovan, B. Prashant, S. C. Venkatesha, N. Anuradha, T. E. Nagaraja, V. A. Tonapi
International Journal of Plant & Soil Science · pp. 225–235 · Published 3 Sep 2021
10.9734/ijpss/2021/v33i1830592Abstract
Recombination breeding is limited in finger millet due to tiny florets and irregular anthesis. Induced mutagenesis using gamma irradiation was attempted to improve grain yield and related traits in three elite cultivars (GPU28, GPU 67 and MR 6). Mean performance and estimates of BLUP and BLUE of 61 mutants showed variability among the mutants for grain yield in comparison to parental genotypes. Grain yield being a complex trait and influenced by high G × E interaction recorded low heritability estimate sand therefore BLUP provided more reliable estimates for grain yield. Stability analysis was conducted using GGE biplot techniques and also by plotting the trait means with their respective coefficient of variation values(CVs). From mean performance and stability analysis, the mutants GPU28-2212, GPU28-2086, GPU28-2082 derived from GPU 28 variety, GPU67-3358, GPU67-3359, GPU67-2094 from GPU67 variety and MR6-3393 from MR6 variety were superior for grain yield and related traits. Combined association analysis revealed tillers per plant as highly correlated trait with grain yield indicating key trait for grain yield improvement in finger millet. Mutants with improved finger traits and blast resistance are also discussed.
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