PATH COEFFICIENT ANALYSIS OF YIELD AND ITS COMPONENTS IN QUINOA (Chenopodium quinoa Willd.) UNDER DIFFERENT NITROGEN LEVELS

doi:10.12816/ejpb.2020.199313

PATH COEFFICIENT ANALYSIS OF YIELD AND ITS COMPONENTS IN QUINOA (Chenopodium quinoa Willd.) UNDER DIFFERENT NITROGEN LEVELS

Document Type : Original research

10.12816/ejpb.2020.199313

Abstract

Application of nitrogen fertilizer is the most important practice that determines the grain yield and its quality. The field experiment was performed to determine differential response of 4 quinoa genotypes under 3 different levels of nitrogen fertilization. The results indicated that, Chipaya and Line 14 genotype are superior in the grain yield / hectare. While, Q5 genotype recorded the highest value of protein at 160 kg N/ha. Use efficiency showed that, the rate of increase of nitrogen fertilization from 0 to 80 kg/ha is greater than increasing nitrogen fertilization from 80 to 160 kg. With regard to correlation, the strong relationships with grain yield/ha were recorded with plant height and grain yield/plant. Concerning path analysis, the grain yield and weight of 1000 grain followed by fat % exhibited high positive direct effects on grain yield/ha. We can conclude that, plant height is useful in indirect selection during early stages of growth while, grain yield/ plant and weight of 1000 grains are useful in direct selection at harvesting for grain yield/ ha.

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