Character Association Studies in Groundnut (Arachis hypogaea L.)
| Autor: | Olalekan J. Olasan, Celestine Uzoma Aguoru, Lucky O. Omoigui, Ebenezer J. Ekefan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Regression analysis 04 agricultural and veterinary sciences General Medicine Plant disease resistance Biology 040401 food science 01 natural sciences Crop 0404 agricultural biotechnology Animal science Point of delivery Trait Chi-square test Cultivar Completely randomized design 010606 plant biology & botany |
| Zdroj: | American Journal of Plant Sciences. :1531-1543 |
| ISSN: | 2158-2750 2158-2742 |
| DOI: | 10.4236/ajps.2018.97112 |
| Popis: | The aim of this study was to evaluate the degree of relationship and association amongst morphological characters of groundnut as an important food crop in Nigeria. 118 cultivars were planted in a completely randomized design structure. Characterization was based on qualitative and quantitative evaluations of 62 characters. Data were analysed on the SPSS software (20.0 versions). Correlation tools were applied using Spearman, Kendall and Pearson methods. Level of relationship was determined based on the strength of coefficients R. Dependence among traits was tested using the Chi square. Multiple regression analysis was carried out in a predictive model. As a result, many of the traits are very weakly correlated. Day to emergence has no effect on Day to 50% flowering (R = 0.237, p 0.6, p < 0.9) were observed amongst pod and seed parameters. Pod sizes significantly affect the number of seeds present (R = 0.551, p < 0.01) with R2 of 30%. Qualitative traits have no effect on each other as all coefficients are very low. Pod constriction and sizes have no relationship (R = -0.029). Tolerance to diseases is not affected by any qualitative trait. Also, no trait determines seed colour. Pubescence of young and mature leaflets recorded the only high positive correlation among all qualitative traits (R = 0.837, p = 0.01). However, leaf and stem pubescence have no relationship. The following traits significantly depend on cultivar type: disease tolerance (χ2 = 17.93, p = 0.000), plant survivorship (χ2 = 39.97, p = 0.000) and pod yield (χ2 = 69.695, p = 0.008). Seed yield has been predicted in a fit model with R2 of 51% and significant p values (p < 0.05) among some predictors. When appropriately applied, the information provided in this report may be useful to groundnut growers and breeders as well those interested in systematic studies of the crop. |
| Databáze: | OpenAIRE |
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