Agromorphological and Physiological Performance of Ethiopian Common Bean (Phaseolus vulgaris L.) Genotypes under Different Agroecological Conditions
Author:
Tigist Shiferaw Girsil12ORCID, Sibiya Julia2ORCID, Amelework Assefa3ORCID, Keneni Gemechu4
Affiliation:
1. Ethiopian Institute of Agricultural Research, Melkassa Agricultural Research Centre, Adama P.O. Box 430, Ethiopia 2. African Center for Crop Improvement, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa 3. Agricultural Research Council, Vegetable, Industrial and Medicinal Plant, Private Bag X293, Pretoria 0001, South Africa 4. Ethiopian Institute of Agricultural Research, Holeta Agricultural Research Centre, Addis Ababa P.O. Box 2003, Ethiopia
Abstract
The objectives of this study were to assess the agronomic performance of common bean genotypes, previously selected for their response to infestation, by Mexican bean weevil and to identify promising lines that can be used as parents in a downstream breeding program. Field experiments were conducted using 144 genotypes under three different agro-ecologies in an unbalanced incomplete block design with three replications. Data on 15 agro-morphological traits were collected, and multivariate methods were used to examine the patterns of variation among the genotypes. The genotypes revealed a high level of phenotypic diversity for all agronomic traits. Six principal components, which contributed 84% of the total variation among the genotypes, were identified. The 15 agro-morphological traits classified the genotypes into three distinct major clusters and sub-clusters. The clustering patterns of the genotypes were according to the seed size, whereby the small and medium beans were distinctly separated from the large-seeded beans. The study established the existence of considerable genetic variations among common bean genotypes. Unique genotypes, such as Nasir, Awash Melka, and RAZ-36 from Cluster I, RAZ-2, RAZ-11, and RAZ-42 from Cluster II, and SER-125, SCR-15, MAZ-200, MAZ-203, and RAZ-120 from Cluster III, were selected based on their distinct agronomic performance. The selected genotypes could be useful for the common bean breeding program.
Funder
Revolution for Africa African Centre for Crop Improvement University of KwaZulu-Natal
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
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