Márcia Carvalho1, Penelope J Bebeli2, Graça Pereira3, Isaura Castro1,4, Catalina Egea-Gilabert5, Manuela Matos4,6, Efstathia Lazaridi2, Isabel Duarte3, Teresa Lino-Neto7, Georgia Ntatsi2, Miguel Rodrigues8, Dimitrios Savvas2, Eduardo Rosa1, Valdemar Carnide1,4. 1. Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal. 2. Department of Crop Science, Agricultural University of Athens, Athens, Greece. 3. National Institute for Agrarian and Veterinarian Research IP (INIAV), Elvas, Portugal. 4. Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal. 5. Department of Agrarian Science and Technology, Technical University of Cartagena, Cartagena, Spain. 6. Biosystems and Integrative Sciences Institute (BioISI), Sciences Faculty, University of Lisbon, Lisbon, Portugal. 7. BioSystems and Integrative Sciences Institute (BioISI), Plant Functional Biology Centre, University of Minho, Braga, Portugal. 8. Animal and Veterinary Research Centre (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal.
Abstract
BACKGROUND: Genetic diversity is fundamental to breeding programs and consequently has an important role in obtaining new varieties. To properly use the genetic diversity present in germplasm collections, a good knowledge of the agro-morphological traits of each accession is needed. The aim of this study was to explore the production capacity of 24 cowpea landraces from southern Europe, through phenotypic characterization and evaluation in three different locations in Greece and Portugal. RESULTS: Most qualitative parameters tested showed a high stability among the three locations. A wide difference was observed among the three locations with respect to number of days to flowering, ranging from 55 to 99 days. Quantitative traits showed a higher genotype × environment than genetic variance component. In general, an inverse relationship between σ2ge /σ2g ratio (where σ2ge is genotype × genotype interaction and σ2g is genotype impact) and heritability value was observed. Principal component analysis was able to group accessions based on their origin. The first two principal components explained 97.52% of variation, being the number of seeds per plant, plant height and seed protein content, the traits which contributed most to variability. CONCLUSION: The results show that sufficient variation exists in different traits within landraces in the studied cowpea germplasm to pursue a breeding program. However, the quantitative traits showed a higher genotype × environment component.
BACKGROUND: Genetic diversity is fundamental to breeding programs and consequently has an important role in obtaining new varieties. To properly use the genetic diversity present in germplasm collections, a good knowledge of the agro-morphological traits of each accession is needed. The aim of this study was to explore the production capacity of 24 cowpea landraces from southern Europe, through phenotypic characterization and evaluation in three different locations in Greece and Portugal. RESULTS: Most qualitative parameters tested showed a high stability among the three locations. A wide difference was observed among the three locations with respect to number of days to flowering, ranging from 55 to 99 days. Quantitative traits showed a higher genotype × environment than genetic variance component. In general, an inverse relationship between σ2ge /σ2g ratio (where σ2ge is genotype × genotype interaction and σ2g is genotype impact) and heritability value was observed. Principal component analysis was able to group accessions based on their origin. The first two principal components explained 97.52% of variation, being the number of seeds per plant, plant height and seed protein content, the traits which contributed most to variability. CONCLUSION: The results show that sufficient variation exists in different traits within landraces in the studied cowpea germplasm to pursue a breeding program. However, the quantitative traits showed a higher genotype × environment component.
Authors: Antonio M De Ron; Penelope J Bebeli; Valeria Negri; Maria Carlota Vaz Patto; Pedro Revilla Journal: Front Plant Sci Date: 2018-10-22 Impact factor: 5.753
Authors: Márcia Carvalho; Valdemar Carnide; Carla Sobreira; Isaura Castro; João Coutinho; Ana Barros; Eduardo Rosa Journal: Plants (Basel) Date: 2022-08-09