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Zekeria Yusuf Habib
Habtamu Zeleke
Wassu Mohammed
Shimelis Hussein
Arno Hugo
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Zekeria Yusuf Habib
Habtamu Zeleke
Wassu Mohammed
Shimelis Hussein
Arno Hugo
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International Journal of Plant Breeding and Crop Science

Genetic Progress for Yield, Yield Components and Other Agronomic Characters of Groundnut (Arachis Hypogea L.) Cultivars in Eastern Ethiopia

Zekeria Yusuf*, Habtamu Zeleke, Wassu Mohammed, Shimelis Hussein, Arno Hugo

Biology Department, Haramaya University, Dire Dawa, Ethiopia.

School of Plant Science, Haramaya University, Dire Dawa, Ethiopia.

Department of Crop Science, University of Kwazulu-Natal, Durban, Republic of South Africa.

Department of Food Science, University of Free State, Bloemfontein, Republic of South Africa.

Accepted 2 July, 2017

Citation: Yusuf Z, Zeleke H, Mohammed W, Hussein S, Hugo A (2017). Genetic Progress for Yield, Yield Components and Other Agronomic Characters of Groundnut (Arachis Hypogea L.) Cultivars in Eastern Ethiopia. International Journal of Plant Breeding and Crop Science 4(2): 237-242.

Copyright: © 2017 Yusuf et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Abstract

Genetic progress has brought about increase in yield potential per se for almost all production areas around the world. The present study examines the relationship of groundnut yield with year of release, yield components and other agro-morphological traits using aggregative data from 1976 to 2012 to calculate genetic gain in groundnut grain yield across four locations in Eastern Ethiopia. The direct method, that compares cultivars with their year of release, was used. The relative gain for groundnut grain yield was 1.08% since 1976. A deeper understanding of these issues facilitates the identification of specific yield-limiting factors that can be used for future breeding strategies. Grain yield, 100 seed weight, plant height and harvest index were significantly correlated with year of release for tested locations, emphasizing the most promising traits for groundnut breeders in the past. These traits were also responsible for the significant genetic progress in groundnut yield in Ethiopia since 1976. Further improvement in the yield potential of groundnut will have to involve increase in other traits, like pod weight per plant, seed weight per plant, that have shown significant positive correlation with grain yield.

Key words: relative genetic gain, genetic progress, grain yield, groundnut