Chemical Element Accumulation by Populations of Corn (Zea mays L.) Selected for High and Low Accumulation of P¹

Abstract

The objective of the investigation of which this report is a part was to identify chemical elements, organic compounds, or metabolic processes which are associated with genetically controlled P accumulation in corn (Zea mays L.). Two populations of corn, each with subpopulations selected for high and low P in ear leaves, were produced by randomly sib mating the F2 and five and six subsequent generations of an early maturing single‐crossed hybrid and a late maturing single‐cross hybrid. Each single‐cross hybrid contained homozygous inbred lines previously characterized as contributors of low and high concentrations of P to other single‐cross hybrids. In ear leaves, high P was associated with significantly higher, but not substantially different, concentrations of N and B. In seedling plants, grown for three weeks in a growth chamber, high accumulation of P was associated with higher concentrations of N and significantly higher concentrations of S, Ca, Cu, and B.

Variability of soybean germplasm in relation to phosphorus uptake and use efficiency

“…Hybrids resulted from crossing of low P-accumulation inbred lines were also low accumulators, and those resulted from crossing of high P-accumulation inbred lines, were high accumulators. Baker et al (1970Baker et al ( ,1971 found differences among hybrids for the leaf P-accumulation and grain yield and confirmed the high heritability for this character. The leaf P accumulation was not correlated with plant ability in Puptake, but was associated to physiological processes independent of roots.…”

“…These variables together with shoot and total DM explained most of the variability within soybean germplasm for the P-efficiency characters (Figure 1). Other researchers have reported low nutrient concentration or accumulation in the plant tissue as a nutrient efficiency character (Barber et al, 1967;Baker et al, 1970;1971;Spehar & Souza, 1999). Barber et al (1967) observed genetic controlled variations in P-accumulation in maize.…”

“…Other researchers have reported low nutrient concentration or accumulation in the plant tissue as a nutrient efficiency character (Barber et al, 1967;Baker et al, 1970;1971;Spehar & Souza, 1999). Barber et al (1967) observed genetic controlled variations in P-accumulation in maize. Hybrids resulted from crossing of low P-accumulation inbred lines were also low accumulators, and those resulted from crossing of high P-accumulation inbred lines, were high accumulators.…”

Heritability of, and relationships between phosphorus and nitrogen concentration in shoot, stolon and root of white clover (Trifolium repens L.)

“…In lucerne (Hill and Lanyon, 1983) and maize (Baker et al, 1971), selection for increases and decreases in %P level of shoots has been achieved with realised heritabilities for lucerne of 0.17 to 0.36 (Miller et al, 1987). Similarly in lucerne selections for high and low %N levels have been successful (Teuber et al, 1984).…”

Genetic nature of phosphorus accumulation in maize

“…Neikova-Bocheva et al (15) emphasized the importance of chromosomal and cytoplasmic effects on the uptake and accumulation of elements in plants. The uptake and accumulation of phosphorus by maize has been studied extensively by Gorsline et al (10), Baker et al (1), Thomas and Baker (19), Clark et al (6), and 502 RAKHAETAL.…”