Interaction of genotype and environment effects on important traits of cassava (Manihot esculenta Crantz)
| Autor: | Rob Melis, Paul Shanahan, Asiimwe Theodore, Athanase Nduwumuremyi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Veterinary medicine Genotype stability index medicine.medical_treatment Plant Science Plant disease resistance Interaction 01 natural sciences complex mixtures Additive main effects and multiplicative interaction lcsh:Agriculture Genotype medicine Total carotene content lcsh:Agriculture (General) biology business.industry Manihot esculenta Carotene lcsh:S Ammi Environmental adaptation 04 agricultural and veterinary sciences biology.organism_classification lcsh:S1-972 Biotechnology Physiological postharvest deterioration 040103 agronomy & agriculture Postharvest Genotype adaptation 0401 agriculture forestry and fisheries bacteria business Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Crop Journal, Vol 5, Iss 5, Pp 373-386 (2017) |
| ISSN: | 2214-5141 |
| Popis: | General and specific environmental adaptation of genotypes is the main goal of breeders. However, genotype-by-environment (G × E) interaction complicates the identification of genotypes for release. This study aimed at analyzing the effects of G × E interaction on the expression of important cassava traits using two multivariate analyses: additive main effects and multiplicative interaction (AMMI) and genotype stability index (GSI). Total carotene content (TCC), postharvest physiological deterioration (PPD), and reaction to viral diseases were significantly affected by G × E interaction effects. The low percent (%) variation due to genotype for cassava brown streak disease (CBSD) explained the influence of environment on CBSD expression. The % variation due to genotype for TCC was higher (96%) than variation due to environment (1.7%) and G × E interaction (2.4%) indicating a low interaction effect of environment on TCC accumulation. The % variation due to genotype was higher than % variation due to environment for all traits but CBSD root necrosis and CBSD on stems, indicating the influence of environment on the severity of the viral diseases. These findings indicate that screening for disease resistance requires multi-environment trials, whereas a single-environment trial suffices to screen for total carotene content. |
| Databáze: | OpenAIRE |
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