Character Association and Path Coefficient Analysis in Grain Amaranth (Amaranthusspp.)

Abstract

Twenty-two genotypes of amaranth (Amaranthus spp.) were evaluated for 12 quantitative traits for two years and the pooled data was analyzed. The mean, range, genotypic and phenotypic coefficient of variation, heritability in broad sense and genetic advance were calculated. Path coefficient analysis was carried out using correlation coefficients to know the yield-contributing traits having true associations with seed yield. The low differences between the phenotypic and genotypic coefficients of variations indicated low environmental influences on the expression of the traits studied. High heritability coupled with high genetic advance for yield/day to maturity, yield/day to seed fill, harvest index, panicle girth and seed yield/plant was observed. All the traits except days to seed fill possessed positive association with grain yield. Harvest index was positively correlated with days to maturity. Harvest index, aerial biomass/plant and days to maturity also had high phenotypic and genotypic direct effects on seed yield/plant, revealing that indirect selection for these traits would be effective in improving seed yield. Highlights• The characters yield/day to maturity, yield/day to seed fill, harvest index, panicle girth and seed yield/plant showed high heritability coupled with high genetic advance • The path coefficient analysis revealed harvest index, panicle girth, aerial biomass/plant and days to maturity as the most important yield component traits that should be taken into account while formulating selection strategies in amaranth.

Genotypic Correlation Coefficients among Growth, Yield and Quality Parameters in Amaranthus Genotypes (Amaranthus tricolor L.)

“…Hence, selection pressure on any one of these character would bring about improvement in all these yield traits. Similar results were noticed by Sarker et al, (2014), Roni (2013), Patial et al, (2014), Chattopadhyay et al, (2013), Diwan et al, (2017), Buhroy et al, (2017) and Sravanti (2011) andPanda (2015). The traits like hypocotyl length, iron content and oxalate content of leaves exhibited negative and significant association with plant height.…”

“…Similar results were obtained by Sravanti (2011) for seed yield per plant, Patial et al, (2014) for yield per plant and harvest index, Yashwanth (2009) for grain yield per plant in grain amaranth genotypes (Table 2).…”

Genetic variability studies in amaranthus (Amaranthus spp.)

“…Moderate GCV and PCV were observed for leaf width, petiole length and foliage yield per plant which indicated presence of moderate amount of variability for these traits and little influence of environment on these traits. The similar results are also observed by Ahammed et al (2012), Hasan et al(2013), Patial et al(2014), Buhroy et al (2017) and Diwan et al (2017).…”

Colorant Pigments, Nutrients, Bioactive Components, and Antiradical Potential of Danta Leaves (Amaranthus lividus)

“…However, in the Indian subcontinents, it has grown as a wild and cultivated form. The diversified germplasm of amaranth indicates its enormous variability and plasticity in phenotype [ 173 , 174 , 175 , 176 , 177 , 178 , 179 , 180 , 181 , 182 , 183 , 184 , 185 , 186 , 187 , 188 , 189 , 190 , 191 , 192 , 193 , 194 , 195 ], which has multipurpose uses. The attractive flavor, color, and taste make it a standard vegetable in different culinary dishes in the Indian subcontinent.…”