Abstract
Cultivars of a crop can differ genetically with respect to their uptake, translocation, accumulation, and use of phosphorus. The objective of this paper was to evaluate genetic variation for P uptake and utilization among peanut (Arachis hypogaea L.) genotypes. Several traits contribute to the total P efficiency of the genotype, including root length, rate of P uptake per unit root length, leaf and pod characters such as P accumulation, and dry matter/yield produced per unit P absorbed [i.e., P efficiency ratio (PER)]. Peanut genotypes with increased P uptake and higher PER were identified. Some genotypes sustained higher PER at both low and high soil P availabilities.
Author notes
1 This research was conducted at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, AP 502324, India (Jour. Article No. 1317). Author is presently a Visit, Scholar at the Soil & Water Sci. Dept., Univ. of Florida, Gainesville, FL 32611.