African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6545

Full Length Research Paper

Preliminary evaluation of genetic inheritance of root traits of common bean (Phaseolus vulgaris L.) for tolerance to low soil phosphorus

Nathan Aliel Kachiguma
  • Nathan Aliel Kachiguma
  • Ministry of Agriculture, Department of Agricultural Research Services, Lunyangwa Agricultural Research Station, P. O. Box 59, Mzuzu, Malawi.
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Beatrice E. Ifie
  • Beatrice E. Ifie
  • West Africa Centre for Crop Improvement (WACCI), University of Ghana, College of Basic and Applied Sciences, PMB LG 30, Legon, Accra, Ghana.
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John S. Y. Eleblu
  • John S. Y. Eleblu
  • West Africa Centre for Crop Improvement (WACCI), University of Ghana, College of Basic and Applied Sciences, PMB LG 30, Legon, Accra, Ghana.
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Moses F. A. Maliro
  • Moses F. A. Maliro
  • Lilongwe University of Agriculture and Natural Resources, Bunda College Campus, P. O. Box 219, Lilongwe, Malawi.
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Pangirayi B. Tongoona
  • Pangirayi B. Tongoona
  • West Africa Centre for Crop Improvement (WACCI), University of Ghana, College of Basic and Applied Sciences, PMB LG 30, Legon, Accra, Ghana.
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Kwadwo Ofori
  • Kwadwo Ofori
  • West Africa Centre for Crop Improvement (WACCI), University of Ghana, College of Basic and Applied Sciences, PMB LG 30, Legon, Accra, Ghana.
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  •  Received: 13 January 2021
  •  Accepted: 16 April 2021
  •  Published: 30 June 2021

Abstract

Common beans are an important nutritious food crop to many people in developing countries. Inadequate soil-P is one of the major constraints to high bean seed yield productivity. Information about genetic effects that control inheritance of root traits in common bean grown under low soil-P conditions is scarce, and that is a challenge for genetic enhancement. This study was therefore implemented to determine inheritance and gene action of root traits in common bean for tolerance to low soil-P. The six generations were evaluated in a completely randomised design with two replicates under low soil-P in a pot experiment. Generation mean analysis revealed that both allelic and non-allelic genetic interactions controlled inheritance of root traits studied. Cumulative main gene effect was higher than epistasis effects. Additive genetic effects were more predominant than dominance effects. Additive and additive × dominance epistatic gene effects were more important in controlling inheritance of root traits under low soil-P. Broad-sense heritability for hypocotyl root number was the highest (93.98 %) while the narrow-sense heritability was moderate (51.13 %). To develop improved genotypes tolerant to low soil-P, recombination crossing should be followed by screening and selection in later generations for high seed yield, root and other preferred traits.

Key words: Common bean, inheritance, genotype, gene effect, heritability, low soil-P.