Character associations between seed yield and its components traits in cowpea [<italic>Vigna unguiculata</italic> (L.) Walp.]

Abstract

A field experiment was conducted during kharif season 2013 to estimate the correlations and path coefficients for ten quantitative characters among 72 cowpea germplasm. Seed yield per plant had positive significant correlation with days to 50% flowering, plant height, primary branches per plant, pods per plant, pod length, seeds per pod and 100-seed weight at both genotypic and phenotypic levels. Path coefficient analysis revealed that primary branches per plant and 100-seed weight had high direct positive effect on seed yield per plant at both genotypic and phenotypic levels. Pod length, days to maturity, 100 seed weight and pod wall proportion had high positive direct effects on seed yield per plant at only genotypic level. Correlation and path analysis indicated that for increasing seed yield in cowpea direct selection should be carried out for higher values of primary branches per plant, pods length, days to maturity and 100 seed weight.

Correlation and Path Coefficient Analyses of Cowpea (&lt;i&gt;Vigna unguiculata&lt;/i&gt; L.) Landraces in Ethiopia

“…A similar finding was reported by [27]. In general, these genetic relationships of traits may result from pleiotropic effects of a gene, linkage of two genes, linkage disequilibrium, and epistatic effects of different genes or due to the environmental influences [28] [29].…”

“…On the other hand, numbers of seed per plant and biomass showed negatively phenotypic and genotypic correlated with days to flowering. [27] also reported days to maturity, plant height, pod length, number of seed per pod and hundred seed weight were positively correlated with days to flowering at phenotypic and genotypic levels. Positive and highly significant genotypic and phenotypic correlations were recorded between days to maturity and plant height, terminal leaflet width, number of seeds per pod, seed length, seed thickness, seed width, and hundred seed weight.…”

Character Association and Path Analysis in Cowpea [Vigna unguiculata (L.) Walp] Germplasm Line

“…Number of pods per plant (0.239) followed by biological yield per plant (0.236) and harvest index (0.089) exhibited considerable positive indirect effect on seed yield per plant via number of pods per cluster by Kutty et al, (2003) and Driba Shanko et al, (2014). Biological yield per plant (0.225) followed by number of cluster per plant (0.072), number of flowers per cluster (0.010), number of flowers per plant (0.008) and test weight (0.006) exhibited considerable positive indirect effect on seed yield per plant via number of primary branches per plant by Tyagi and Koranne (1988) and Altinbas and Sepetogly (1993) and Meena et al, (2015). Number of pods per plant (0.185) followed by number of seeds per pod (0.011) and test weight (0.009) exhibited considerable positive indirect effect on seed yield per plant via biological yield by Uguru (1995) and Kutty et al, (2003).…”

Path analysis for agronomic traits and yield of salt tolerant rice cultivars under moderate salinity condition in Central Vietnam

“…Therefore, the level of contribution of each factor/trait to yield is quantified. The path analysis method is very useful and plays an important role in identifying important agronomic traits/genes/factors that determine crop yields (Meena et al, 2015;Thanga et al, 2015;Anamika and Dhirendra, 2016;Tejbir, 2016;Yahaya and Ankrumah, 2017;Rukmini et al, 2017).…”