Interrelationship and Path Coefficient Analysis of Some Growth and Yield Characteristics in Cowpea (Vigna Unguiculata L. Walp) Genotypes
Journal of Plant Sciences
Volume 2, Issue 2, April 2014, Pages: 97-101
Received: Apr. 12, 2014; Accepted: May 8, 2014; Published: May 20, 2014
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Authors
Diriba Shanko, Department of Biology, Bule Hora University, Bule Hora, Ethiopia
Mebeasellasie Andargie, Biology Department, Haramaya University (HU), P.O. Box: 138, Dire Dawa, Ethiopia
Habtamu Zelleke, Plant Sciences Department, College of Agriculture and Environmental Sciences, Haramaya University (HU), Dire Dawa, Ethiopia
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Abstract
Field experiments were conducted during 2010/2011 to determine the interrelationship and path coefficient analysis of growth characters to seed yield. The experiment was laid out in 7 x 7 triple lattice designs at Haramaya University research farm, Dire Dawa. Seed yield exhibited positive and significant environmental correlation with number of primary branches per plant, number of secondary branches per plant, days to 50% flowering, number of pods per plant, number of seeds per pod and plant height. Path analysis revealed that, yield per plant exerted the maximum positive direct effect on seed yield followed by number of pods per plant, while number of secondary branches per plant, days to flowering, days to maturity and number of seed per pod exhibited negative direct effect phenotypically. In addition, genotypic path analysis revealed that, maximum direct effect on seed yield was exerted by number of pods per plant and yield per plant. However, days to 50% flowering, days to maturity, number of secondary branches per plant and number of seed per pod exerted negative direct effect on seed yield. Thus, yield per plant and number of pods per plant could be used as a selection index for cowpea improvement.
Keywords
Correlation, Cowpea, Interrelationship, Path Analysis
To cite this article
Diriba Shanko, Mebeasellasie Andargie, Habtamu Zelleke, Interrelationship and Path Coefficient Analysis of Some Growth and Yield Characteristics in Cowpea (Vigna Unguiculata L. Walp) Genotypes, Journal of Plant Sciences. Vol. 2, No. 2, 2014, pp. 97-101. doi: 10.11648/j.jps.20140202.13
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