African Journal of Plant Science
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Article Number - B2983BA61529


Vol.10(11), pp. 246-257 , November 2016
DOI: 10.5897/AJPS2016.1448
ISSN: 1996-0824



Full Length Research Paper

Genetic diversity in lowland, midaltitude and highland African maize landraces by morphological trait evaluation



Stephen Asare
  • Stephen Asare
  • Department of Crop and Soil Science, Kwame Nkrumah University of Science and Technology Kumasi, Ghana.
  • Google Scholar
Antonia Y. Tetteh
  • Antonia Y. Tetteh
  • Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology Kumasi, Ghana.
  • Google Scholar
Patrick Twumasi
  • Patrick Twumasi
  • Department of Crop and Soil Science, Kwame Nkrumah University of Science and Technology Kumasi, Ghana.
  • Google Scholar
Kingsley B. Adade
  • Kingsley B. Adade
  • Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology Kumasi, Ghana.
  • Google Scholar
Richard A. Akromah
  • Richard A. Akromah
  • Department of Crop and Soil Science, Kwame Nkrumah University of Science and Technology Kumasi, Ghana.
  • Google Scholar







 Received: 28 July 2016  Accepted: 29 September 2016  Published: 30 November 2016

Copyright © 2016 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


Genetic diversity information is a resource for improvement in crop productivity and trait performance, however, there is scanty information on genetic diversity estimates in the maize landraces covering the major geographical regions of Africa. In the current study, the genetic diversity of 35 landraces originating from lowland, midaltitude and highland regions of Africa and held in the IITA Genetic Resource Center, Ibadan, Nigeria, were evaluated using morphological trait evaluation. The landraces were tested in non-stressed environments in Ghana by evaluation of 27 traits. A large within and between genetic variability was identified which increased from highland to lowland populations and was highest in the midaltitude population. Genetic similarity coefficients ranged from 0.00 to 0.80 with mean of 0.26±0.18 across the three populations, and 0.23±0.16, 0.29±0.18, and 0.38±0.25 in the midaltitude, lowland and highland populations, respectively. A total of 21 discriminant traits were identified from the principal components analysis. A UPGMA cluster analysis and PCA biplot produced four main clusters which provide a sound basis for exploitation of heterosis. Nine distant landraces were identified majority of which produced grain yield exceeding 5.0 Mg ha-1. In terms of improvement in grain yield, earliness and drought tolerance, TZm-14, TZm-41, TZm-242, TZm-37, TZm-1360, TZm-1376, TZm-1367, TZm-4, and TZm-270 would be useful. A large genetic diversity resides in the African maize landraces which could be conserved and exploited for maize improvement.

Key words: Maize, genetic diversity, African maize landraces, morphological traits, cluster analysis, PCA.

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APA Asare, S., Tetteh, A. Y., Twumasi, P., Adade, K. B., & Akromah, R. A. (2016). Genetic diversity in lowland, midaltitude and highland African maize landraces by morphological trait evaluation. African Journal of Plant Science, 10(11), 246-257.
Chicago Stephen Asare, Antonia Y. Tetteh, Patrick Twumasi, Kingsley B. Adade and Richard A. Akromah. "Genetic diversity in lowland, midaltitude and highland African maize landraces by morphological trait evaluation." African Journal of Plant Science 10, no. 11 (2016): 246-257.
MLA Stephen Asare, et al. "Genetic diversity in lowland, midaltitude and highland African maize landraces by morphological trait evaluation." African Journal of Plant Science 10.11 (2016): 246-257.
   
DOI 10.5897/AJPS2016.1448
URL http://academicjournals.org/journal/AJPS/article-abstract/B2983BA61529

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