Greener Journal of Plant Breeding and Crop Science

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Greener Journal of Plant Breeding and Crop Science

Vol. 9(1), pp. 8-18, 2021

ISSN: 2354-2292

Copyright ©2021, the copyright of this article is retained by the author(s)

https://gjournals.org/GJPBCS

 

 

 

 

 

 

 

Generation mean analysis for harvest and leaf-yield indices in Cowpea

 

 

1,3Akombo, R.A.; 2Adeyemo, M.O.; 3Odo, P.E.; 3Vange, T.

 

 

1 (Department of Crop Production Technology, Akperan Orshi Polytechnic Yandev, PMB 181 Gboko, Njgeria). 

2(Department of Crop Production, Joseph Sarwuan Tarka University, Makurdi, PMB 2373 Makurdi, Njgeria).

1,3(Department of Plant Breeding and Seed Science, Joseph Sarwuan Tarka University, Makurdi, 2373 Makurdi, Njgeria).

 

 

 

ARTICLE INFO

ABSTRACT

 

Article No.: 080121072

Type: Research

 

 

Genetic studies of dual-purpose traits in cowpea was carried out at Teaching and Research Farm of Joseph Sarwuan Tarka University, Makurdi, Nigeria. The objective of the study was to understand  the  gene  action  controlling  harvest  and  leaf-yield  indices  in cowpea  and  to  identify  the  most  appropriate  breeding  strategies  for improving these traits.  Six generations viz: P1, P2, F1, F2, BC1 and BC2 constituted the experimental material. They were grown in a Randomized Complete Block Design with three replications. Data were obtained on Seed yield, dry leaf weight at maturity, total biomass, biological yield, leaf-yield index, harvest index. Statistical analyses conducted included analysis of variance, scaling tests and gene effects, heritability and genetic advance under selection. Significant variation existed among the generations in the two crosses for all the traits indicating sufficient diversity for those traits. Non-allelic interactions along with additive and dominant components played pertinent role in the determination of various characters in cowpea. Inheritance of all traits studied in both crosses were governed by duplicate gene action except for biological yield in Cross II where it was governed by complementary gene action. Selection in later generation for duplicate gene action is recommended. Moderate to high heritability and genetic advance exhibited by most of the traits indicated that heritability was due to additive gene effect. The presence of both additive and non-additive gene effects, moderate to high heritability coupled with moderate/high expected genetic advance in inheritance of most of the traits, suggest that pureline method of breeding could be employed. Breeding methods involving crossing like biparental, pureline breeding, mass selection, that take care of both additive and non-additive gene action should be adopted for improvement of various characters studied.

 

Accepted:  03/08/2021

Published: 06/09/2021

 

*Corresponding Author

Akombo, R.A.

E-mail: akomborich@ yahoo.com

Phone: +2348038289185

 

Keywords:

heritability; genetic advance; generation mean analysis; duplicate gene action; complimentary gene action.

 

 

 

 

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Cite this Article: Akombo, RA; Adeyemo, MO; Odo, PE; Vange, T (2021). Generation mean analysis for harvest and leaf-yield indices in Cowpea. Greener Journal of Plant Breeding and Crop Science, 9(1): 8-18.

 

 


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