Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 381

Full Length Research Paper

Genetic variability, heritability and correlation of quantitative traits for Arabusta coffee (C. arabica L. X Tetraploid C. canephora Pierre)

Jane Jerono Cheserek
  • Jane Jerono Cheserek
  • Kenya Agricultural and Livestock Research Organization (KALRO), Coffee Research Institute, P. O. Box 4-00232, Ruiru, Kenya.
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Kahiu Ngugi
  • Kahiu Ngugi
  • Department of Plant Sciences and Crop Protection, Faculty of Agriculture, College of Agriculture and Veterinary Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi Kenya.
  • Google Scholar
James Wanjohi Muthomi
  • James Wanjohi Muthomi
  • Department of Plant Sciences and Crop Protection, Faculty of Agriculture, College of Agriculture and Veterinary Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi Kenya.
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Chrispine Ogutu Omondi
  • Chrispine Ogutu Omondi
  • Kenya Agricultural and Livestock Research Organization (KALRO), Sugar Research Institute, P. O. Box 44-40100 Kisumu, Kenya.
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  •  Received: 12 July 2019
  •  Accepted: 18 October 2019
  •  Published: 31 March 2020

Abstract

The biennial bearing and the long productive nature of coffee makes it difficult to release coffee variety within a short time span. This study aimed at evaluating the yield performance of the Arabusta hybrids and its backcrosses developed by Coffee Research Institute of the Kenya Agricultural and Livestock Research Organization (KALRO-CRI) using the morphological traits. Nineteen coffee genotypes were evaluated at Siaya ATC and KALRO-Alupe using randomized complete block design with three replications and the morphological data for growth and yield was recorded during the year 2018. The results indicated that there was significant difference in yield among the coffee genotypes and between the sites. Yield had positive significant associations with parentage berries per node (r= 0.61), berries on the longest primary (r= 0.58) and berries per node on the longest primary(r=0.60). The genotypic coefficient of variation (GCV) values for the morphological traits varied from 6.50 to 31.01%. Broad sense heritability ranged from 0.15 to 0.61 with bean yield recording heritability of 0.31.  The number of berries on the longest primary had high broad sense heritability and high genetic advance indicating the presence of additive genes that can be used in coffee improvement through selection.

Key words: Environment, Genetic advance, Robusta, Response, Selection, Variation