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Submitted
June 20, 2021
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September 7, 2021
Published
November 19, 2021
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Abstract

Thirteen lines and three testers were used to produce 39 single cross maize hybrids by line Ítester mating design. The genetic divergence among thirteen lines and three tester of maize were estimated by using Mahalanobis D2 statistic for twelve characters. The genotypes were grouped into five clusters. Cluster I comprised 12 parental genotypes (L1, L2, L3, L4, L5; L6, L7, L8, L9, L11; L12, L13), while Cluster II (T3), III (T1), IV (L10) and V (T2) were mono-genotypic, suggesting more variability in genetic makeup of the genotypes included in these clusters. The correlation coefficients and linear regressions were used to know the effects of parental genetic distance in determining heterosis and per se performance of the hybrids. Parental genetic distance exhibited significant negative association and significant linear regression along with very low coefficient of determination with better parent heterosis (BPH) and non-significant with per se performance of the hybrids. The present investigation, therefore, the parental genetic distance has significant role in determining heterosis and hybrid performance in kharif maize.

Keywords

Genetic diversity, Kharif maize, Mahalanobis D2, Genetic distance

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Krishna, B. ., Singh, B. ., Mandal, S. S., Kumari, . R., & Ranjan, T. . (2021). Heterosis in relation to genetic divergence in short duration maize (Zea mays L.). Environment Conservation Journal, 22(3), 137–142. https://doi.org/10.36953/ECJ.2021.22317
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