See more from this Session: Plant Breeding and Genetics Graduate Poster Competition
Tuesday, October 18, 2011
Henry Gonzalez Convention Center, Hall C, Street Level
Phosphorus (P) is the second most limiting plant nutrient, with 5.7 billion hectares being P deficient worldwide. As the price of P continues to increase, there is a need for more P efficient crops to increase yields on P deficient soils and conserve limited P resources. Most soils have a large amount of total P (100-1500 mg kg-1), yet only a small portion is plant available, as currently estimated by an agronomic P test such as Mehlich-3 (M3). However, certain varieties of plants have been noted as being “P efficient” with the ability to extract and uptake this relatively “non-labile” pool through a variety of mechanisms. The objective of this study was to assess P use efficiency among various wheat cultivars. Twenty-two different winter wheat cultivars were grown in two P deficient soils; calcareous and non-calcareous. After 4 weeks in a growth chamber, roots and shoots were harvested with total biomass measured. Results from this study will provide producers working on low P soils, as well as breeders working to improve the P use efficiency of their wheat lines, with new insight and tools to address the ever growing P deficiency throughout the world.