Heritability, Genetic Advance and Character Association in Six Yield Related Characters of Solanum anguivi

Exploitation of genetic potential of sweetpotato for end-user traits improvement

“…The trends for the PVC and the GVC values (Table 6) were in agreement with the results reported for Solanum anguivi (Denton and Nwangburuka, 2011), Corchorus olitorius (Nwangburuka and Denton, 2012), Triticale (Kumar et al, 1985) and oat (Prasad et al, 1981). The observed trend between PVC and GVC could be attributed to environmental effects (Denton and Nwangburuka, 2011). This is because variance of phenotype is due to genotypic and environmental factors combined.…”

“…However, a large number of replicates may be required for traits with lower genetic variance than the error variance (root dry matter, sucrose, total sugar, starch, protein and zinc content) to enhance the optimisation of their genetic effects. The trends for the PVC and the GVC values (Table 6) were in agreement with the results reported for Solanum anguivi (Denton and Nwangburuka, 2011), Corchorus olitorius (Nwangburuka and Denton, 2012), Triticale (Kumar et al, 1985) and oat (Prasad et al, 1981). The observed trend between PVC and GVC could be attributed to environmental effects (Denton and Nwangburuka, 2011).…”

“…Except for the very high (>1) values observed for dry matter and beta-carotene content (-1.2), sucrose and total sugar content (1.09), sucrose and iron content (1.07), and sucrose and zinc content (1.15), the values for the genetic correlation coefficient were in agreement with those reported by Grüneberg et al (2009). Denton and Nwangburuka (2011) also reported genotypic correlation coefficients greater than one in a study on Solanum anguivi. A similar observation was made by Nwangburuka and Denton (2012) for character association on leaf Corchorous olitorius.…”

“…Traits with medium to high heritability are influenced by additive gene effects (Denton and Nwangburuka, 2011). This suggests that selection based on phenotype will be effective.…”

Genetic Variability, Heritability and Genetic Advance in Cowpea Genotypes in Two Agro-ecological Environments

“…Estimates of genetic parameters do provide an indication of the relative importance of the various types of gene effects affecting the total variation of a plant character. Genotypic and phenotypic coefficients of variation and heritability accompanied with genetic advance are very important parameters in improving traits (Denton andNwangburuka, 2011). Johnson et al (1955) reported the immense importance of selecting and evaluating varieties for quantitative and yield ability in any breeding programme, before such varieties can be introduced to a given local environment.…”