Genetic Associations under Aphids and Rosette Stress in Groundnut (Arachis hypogaea L.)

Musa V. H.^{1, 2,} , Akogu S. E.², Agbaji F.² and Adah H.²

¹Institute for Agricultural Research/Department of Plant Science, Ahmadu Bello University, Zaria, Kaduna State, Nigeria

²Department of Crop Production, Kogi State University, Anyigba, Kogi State Nigeria

Cite this paper

Musa V. H., Akogu S. E., Agbaji F. and Adah H.. Genetic Associations under Aphids and Rosette Stress in Groundnut (Arachis hypogaea L.). World Journal of Agricultural Research. 2020; 8(3):89-96. doi: 10.12691/WJAR-8-3-4

Abstract

Groundnut production is largely constrained by biotic stresses with groundnut rosette virus disease seriously contributing to losses in yield in Nigeria and sub Saharan Africa. This study was conducted to understand performances and correlations between aphid resistance, rosette resistance and other quantitative characters. Two aphid resistance, one rosette resistance, one aphid susceptible and one rosette susceptible lines were used as parents to develop F1s, F2s, BC1P1 and BC1P2. The seventeen generations obtained were evaluated along with three checks in three replications using randomized complete block design. The F₁ generations had higher mean performance compared to the parents suggesting heterosis. The segregating generations (F2s, BC1P1 and BC1P2) had mean values higher or lower than the parents due to transgressive genes. The genotypic correlation coefficients in contrasting magnitudes and directions exceeded those of the corresponding phenotypic correlation coefficients for most of the character pairs indicating that the correlations were more genetic than environmental in the three sets of crosses studied.

Keywords

mean, performance, genotypic, phenotypic, correlations, heterosis, aphids, rosette, groundnut

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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