Legume Research-An International Journal

Identification of New Sources of Rust Resistance in Cowpea (Vigna Unguiculata L. Walp) Germplasm Using Simple Sequence Repeat Markers

DOI: 10.18805/LR-488    | Article Id: LR-488 | Page : 185-189
Citation :- Identification of New Sources of Rust Resistance in Cowpea (Vigna Unguiculata L. Walp) Germplasm Using Simple Sequence Repeat Markers.Legume Research-An International Journal.2020.(43):185-189
A.T. Asare, T.A. Mensah, S.M.A. Tagoe and D.K.A. Asante theophilus.mensah2@stu.ucc.edu.gh
Address : Department of Molecular Biology and Biotechnology, School of Biological Sciences, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana.
Submitted Date : 6-04-2019
Accepted Date : 24-09-2019
First Online:

Abstract

The demand for resistance cowpea to rust infection has currently increased due to considerable yield losses caused by the fungal pathogen. The study assessed available cowpea genotypes for rust resistance using simple sequence repeat (SSR) markers. Out of 100 cowpea genotypes screened, 97% showed presence of the markers whilst 3% showed absence of the markers. Among the cowpea were 72% resistance, 16% moderate resistance and 9% low resistance to rust. The markers revealed mean high allele frequency (0.86) and low gene diversity (0.24) and polymorphism information content (0.21) among the cowpea genotypes. The markers co-inherited with mean regression value greater than 0.1. There was no clear pattern of clustering among the cowpea genotypes. The cowpea genotypes with rust resistance traits could serve as good sources of germplasm for cultivation or resilient genes with rust target in breeding programmes to improve the crop.

Keywords

Cowpea Genotype Rust resistance SSR marker

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