International Journal of
Genetics and Molecular Biology

  • Abbreviation: Int. J. Genet. Mol. Biol.
  • Language: English
  • ISSN: 2006-9863
  • DOI: 10.5897/IJGMB
  • Start Year: 2009
  • Published Articles: 131

Full Length Research Paper

Inheritance of primary yield component traits of common beans (Phaseolus Vulgaris L.): Number of seeds per pod and 1000 seed weight in an 8 × 8 diallel cross population

Mulugeta Atnaf1*, Hussein Mohammed2 and Habtamu Zelleke3
  1Ethiopian Institute of Agricultural Research, Pawe Research Center, Northwestern Ethiopia. 2Hawassa University, College of Agriculture, P. O. Box 05, Hawassa, Ethiopia. 3Haramaya University, College of Agriculture, P. O. Box 37, Dire Dawa, Ethiopia.
Email: [email protected]

  •  Accepted: 08 August 2013
  •  Published: 30 September 2013

Abstract

 

Thirty six (36) genotypes (eight parents and 28 F1 diallel crosses) were grown in randomized complete block design with two replicates during 2006 at Mandura, North western Ethiopia. The experiment was executed to study the inheritance of two primary yield component traits: number of seeds per pod and 1000 seed weight. Statistical significant difference was observed between genotypes, parents and crosses for the traits considered. The mean square due to general combining ability was significant for the two traits. However, specific combining ability mean square was significant only for number of seeds per pod. Thus, both additive and non-additive types of gene actions were important in the inheritance of number of seeds per pod. Significant b1 component was obtained for number of seeds per pod. The b2 and b3 components however, were insignificant, suggesting the absence of gene asymmetry. From Wr/Vr graph, inheritance of seeds per pod was governed by partial dominance with additive gene action.

 

Key words: Diallel crosses, general combining ability, Phaseolus vulgaris L., specific combining ability.