https://doi.org/10.4081/ija.2013.e10

Combining ability and genetic components for pod and seed traits in cowpea lines

Vol. 8 No. 2 (2013)
Submitted: 6 July 2012
Accepted: 8 February 2013
Published: 17 May 2013
Vigna unguiculata, parents, hybrids, additive gene, transgressive segregation, yield traits.
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The identification of suitable parental genotypes potentially generating superior lines with traits contributing to the overall yield of cowpea is an important step in the development of improved varieties. Eight parents and their 28 hybrids obtained through diallel crossing design were evaluated in a randomized complete block design with three replications. Highly significant differences among the parents and their hybrids for different traits were observed. General combining ability (GCA) mean squares were larger than the specific combining ability mean squares for all the traits analysed. The ratio h2/H2 revealed different number of genes controlling the traits, pointing out their polygenic inherited control. The estimated low narrow sense heritability recorded in this study indicated that recurrent selection procedure could be effective to improve the analysed traits in the genotypes included in this study. Kananado with large, positive and significant GCA effects was identified as the parent with desirable genes for the genetic improvement of the considered yield component in cowpea. In addition, IT03K-316-1 x Cowpea-2 and IT99K-316-2 x Kananado seemed to be the best hybrids for number of pods/plant and 100-seed weight, respectively.

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Supporting Agencies

International Institute of Tropical Agriculture (IITA) and Institute for Agricultural Research and Training (IAR&T), both in Ibadan, Nigeria for supplying seeds of parental lines for this study.
Monininuola Adefolake Ayo-Vaughan, Federal University of Agriculture, Abeokuta, Nigeria.

Department of Plant Breeding and Seed Technology.

Lecturer I

How to Cite

Ayo-Vaughan, M. A., Johnson Ariyo, O., & Olusanya Alake, C. (2013). Combining ability and genetic components for pod and seed traits in cowpea lines. Italian Journal of Agronomy, 8(2), e10. https://doi.org/10.4081/ija.2013.e10

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