Evaluation of the efficiency of oily sunflower inbred lines (Helianthus annuus L.) in terms of adsorption and consumption of phosphorus in soil

Phosphorus after nitrogen is the most important and essential nutrient for plants, and plays a major role in the process of energy production and transfer. In an experiment, adsorption efficiency and consumption of phosphorus in 100 oily sunflower inbred lines which collected from different parts of the world were evaluated based on a completely randomized design with three replications in potted conditions under both optimum and phosphorus deficiency states. The results of analysis of variance revealed that there is a significant difference among lines in terms of aerial part dried weight, total phosphorus content and concentration, fertilizer response, phosphorus acquisition efficiency, phosphorus utilization efficiency and calculated phosphorus efficiency. The average of fertilizer response for sunflower lines was 47.35. Totally, the index varied from 4.7 to 226.7 grams. The phosphorus acquisition efficiency index ranged from 0.08 to 0.79 with an average of 0.38. The average of phosphorus utilization efficiency in optimal conditions was 2.67 and in the case of phosphorus deficit conditions it was 1.35. The index varied from 1.11 to 6.11 grams' dry matter per milligram of phosphorus. The phosphorus efficiency index varied from 32.38 to 90.22%. Based on calculated indices, the sunflower lines including 1, 73, 2, 8, 34, 46, 47, 70 and 89 are introduced as phosphorus efficient genotypes and lines including 45, 56, 95, 11, 12, 27, 52, 71, 73, 78 and 94 introduced as phosphorus non-efficient genotypes. Phosphorous efficient lines can be potentially used in the production of phosphorus efficient sunflower hybrids in the breeding programs