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: 409

Full Length Research Paper

Morphological diversity and association of traits in ethiopian food barley (Hordeum vulgare l.) landraces in relation to regions of origin and altitudes

Bedasa Mekonnon*
  • Bedasa Mekonnon*
  • Department of Plant Science, Aksum University College of Agriculture, P. O. Box 314, Aksum, Ethiopia. 2Holetta Agricultural Research Center, P. O. Box 31, Holetta, Ethiopia.
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Berhane Lakew
  • Berhane Lakew
  • Bahir Dar University College of Agriculture and Environmental Science, P. O. Box 79, Bahir Dar, Ethiopia.
  • Google Scholar
Tadesse Dessalegn
  • Tadesse Dessalegn
  • Bahir Dar University College of Agriculture and Environmental Science, P. O. Box 79, Bahir Dar, Ethiopia.
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  •  Received: 22 July 2014
  •  Accepted: 20 November 2014
  •  Published: 28 February 2015

Abstract

One hundred and two barley accessions and five checks were evaluated using augmented design consisting of four complete blocks in 2012 main cropping season at holetta agricultural research center. Ten quantitative and six qualitative characters were recorded. Analysis of variance showed significant difference (p<0.01) among accessions for plant height, awn length, peduncle extrusion, thousand seed weight, number of seeds per spike, days to 50% flowering and days to maturity. Cluster analysis grouped accessions in to five distinct classes with maximum number of accessions (44) in cluster I and minimum (2) in cluster V. Principal component analysis showed that variances of 30, 17, 15 and 10% were extracted from the first four principal components, respectively, which contributed 72% of the total variation among accessions. Estimates of genetic diversity index based on qualitative characters showed high diversity index among characters at Arsi, Wellega and Wello, and diversity index increased in altitude between 2001 and 3000 m.a.s.l and decrease at altitude >3000. Phenotypic diversity was very high for kernel row number (H′=0.99), grain color (H′=0.90) and spike attitude (H′=0.85) and low for lemma color (H′=0.48). Days to flowering, days to maturity and numbers of seed per spike, from quantitative characters and kernel row number, grain color and spike attitude from qualitative characters were the most characters which contributed variances among accessions.

 

Key words: Cluster analysis, diversity index, principal component analysis, qualitative characters, quantitative characters.