Correlation and cluster analysis of white seeded sesame (Sesamum indicum L.) genotypes oil yield in northern Ethiopia

Abstract

The experiment was carried out to access the inter relationship of genotypes in their oil yield with seed yield, oil content and other yield components and to determine cluster of white seeded sesame genotypes and environments based on their oil yield. Seventeen sesame genotypes were tested at six environments in northern Ethiopia during 2015 main season. The experiment was laid out in Randomized Complete Block Designs (RCBD) with three replications across all the environments. Seed yield had a significant and positive correlation (P≤0.01) with number of branches (r = 0.414) and number of capsules (r =0.468). Positive correlation seed yield with number of capsules and number of capsules indicated that better yield can obtain from highly branched plants and high number of capsules because the number of capsules increases with the degree of branching. Seed yield was negative significant correlated with days to maturity (r =-0.500) and flowering time (r = -0.626), significant at (p≤0.05) and (p≤0.01), respectively. The negative association between seed yield and days to flowering and maturity indicated that moisture stress after flowering might have caused relatively a yield reduction in the late maturing genotypes. Whereas, the early flowering and early maturing genotypes can escape the moister stress conditions. Based on the cluster analysis of 17 white seeded sesame genotypes classified in to different four distinct clusters. Cluster II, III and IV had high mean yield, oil content and oil yield than the other clusters. Genotypes grouped in those clusters had also greater genetic divergence important for farther yield, oil yield and oil content improvement program breeding in northern Ethiopia. Sesame growing environments also clustered in to four groups. Environments grouped in Cluster I, II and IV had high seed yield, oil content and oil yield. Hence, environments grouped in those clusters are important for seed yield, oil content and oil yield production improvement program in the study areas.

Evaluation of the performance of some white seeded sesame (Sesamum Indicum L.) genotypes using GGE biplot analysis in Northern Ethiopia

“…This indicated that the large influence of environment causing most of the variation in yield performance of sesame genotypes across all locations while the contribution of GEI to the total variation showed minimal role. Similar result was reported on sesame by Mekonnen et al (2015), Mohammed (2015) and Yirga (2016) (Table 4).…”

“…Accordingly, nearest to the first concentric circle, the environment Dabanu was the ideal environment to select widely adapted sesame genotypes, whereas, Agbe and Finaruwa were far from the ideal environment and considered as unstable. This result was in line with Yan et al (2000), Yan and Rajcan (2002), Yan et al (2007), Fiseha et al (2015 and Yirga (2016) in sesame and Muez et al (2015) in bread wheat.…”

Character Association and Path Analysis for Quantitative Traits in Advanced Breeding Lines of Sesame (Sesamum indicum L.)

“…There was positive significant association between plant height and the traits such as height to first capsule, branches per plant, capsules/plant and oil content. This results are in consonance with results of Goudappagoudra et al, (2011) There was a positive significant correlation between number of branches and traits like plant height, height to first capsule, number of capsules, 1000 seed weight and oil content the results are in consonance with Yirga (2017) and Atul Singh et al, (2018).…”

“…1). These results are in accordance with Sudhakar et al, (2007), Sumathi et al, (2007), Yingzhong and Yishou (2002), Engin Yol et al, (2010), Ibrahim andKhidir (2012), Ammara Fazal et al, (2015), Yirga (2017) and Atul Singh et al, (2018).…”

“…There was positive significant correlation between branches per plant and seed yield/plant, more number of branches leads to more capsules per plant ultimately helps in improving yield/plant these results are in consonance with Vina et al, (2017) and Yirga (2017). There was positive non-significant correlation between oil content and seed yield/plant the outcome were in consonance with Sumathi et al, (2007) and Khairnar and Monpara (2013).…”