Genetic variation among maize genotypes for phosphorus‐uptake and phosphorus‐use efficiency in nutrient solution

Ciarelli, Deborah Maria; Furlani, Â. M. C.; Dechen, Antonio Roque; Lima, Marlene

doi:10.1080/01904169809365556

Cited by 30 publications

(32 citation statements)

References 14 publications

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“…In sorghum, P-efficient inbred lines under low P developed larger root systems (Furlani et al 1984). In maize, Ciarelli et al (1998) observed inverse relation between P-uptake rate and the length of root system. Miao et al (2007a,b) evaluated root characters varieties under internal and external P conditions and observed differences among them in relation to root length, root surface, and P concentration in soybean plant parts.…”

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confidence: 99%

Effects of phosphorus concentration on adaptive mechanisms of high- and low-P efficiency soybean genotypes when grown in solution

Shu-jie¹,

Yun-fa²

2011

PLANT SOIL ENVIRON

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Low availability of phosphorus (P) in soil is a major constraint for crop production in agricultural ecosystems. Therefore, it is very important to explain the adaptive mechanism of crops under low P conditions. The response of high-and low-P efficient soybean (Glycine max L.) genotypes to various external P level was carried out in nutrient solution culture. Results showed that Dongnong1031 (low P-efficient genotype) undergoes major changes in terms of dry mass, root length, root number and root surface, while these response of Hai 616 (high P-efficient genotype) was lower after five weeks of growth. The higher P level in solution, the smaller difference between the two genotypes in these parameters. The amount of H + released by root of Dongnong1031 was lower than that of Hai 616, except when supplied with 50 μmol external P. There was a positive relationship between RPAE (relative phosphorus absorption efficiency) and P concentration in shoot and root material at all P levels, irrespective of soybean genotype. An exponential relationship was found between PUE (phosphorus utilization efficiency) and P concentrations in shoots and roots. These results suggested that an increase in measured root parameters coupled with H + release by roots were key mechanisms for soybean genotypes with high-P efficiency to cope with low P conditions when grown in solution. In order to best select high soybean genotype with high-P efficiency one should pay attention to PUE combined with high RPAE.

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confidence: 99%

Effects of phosphorus concentration on adaptive mechanisms of high- and low-P efficiency soybean genotypes when grown in solution

Shu-jie¹,

Yun-fa²

2011

PLANT SOIL ENVIRON

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“…Efficiency concepts in plant mineral nutrition have been defined based on the process by which plants acquire, transport, store and use the nutrient in order to produce dry matter or grain, at low or high nutrient supply (Ciarelli et al, 1998). The concepts of nutrient acquisition efficiency, used in the sense of plant nutrient acquired from the soil, and nutrient internal utilization efficiency, defined as plant internal ability to produce yield units per unit of nutrient in the plant, have been considered as the two major components of plant nutrient use efficiency (Good et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus acquisition and internal utilization efficiency in tropical maize genotypes

Parentoni

Júnior

2008

Pesq. agropec. bras.

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-The objective of this work was to determine the relative importance of phosphorus acquisition efficiency (PAE -plant P uptake per soil available P), and phosphorus internal utilization efficiency (PUTIL -grain yield per P uptake) in the P use efficiency (PUE -grain yield per soil available P), on 28 tropical maize genotypes evaluated at three low P and two high P environments. PAE was almost two times more important than PUTIL to explain the variability observed in PUE, at low P environments, and three times more important at high P environments. These results indicate that maize breeding programs, to increase PUE in these environments, should use selection index with higher weights for PAE than for PUTIL. The correlation between these two traits showed no significance at low or at high P environments, which indicates that selection in one of these traits would not affect the other. The main component of PUTIL was P quotient of utilization (grain yield per grain P) and not the P harvest index (grain P per P uptake). Selection to reduce grain P concentration should increase the quotient of utilization and consequently increase PUTIL.Index terms: Zea mays, mineral nutrition, phosphorus acquisition, phosphorus use efficiency, plant breeding, quotient of utilization. Eficiência de aquisição e utilização interna de fósforo em genótipos tropicais de milhoResumo -O objetivo deste trabalho foi determinar a importância relativa da eficiência de aquisição (EAP -P absorvido por unidade de P no solo) e de utilização interna de fósforo (EUIP -produção de grãos por unidade de P absorvido), sobre a eficiência de uso desse nutriente (EUP -produção de grãos por unidade de P no solo), em 28 genótipos tropicais de milho, avaliados em três ambientes com baixa e dois com alta disponibilidade de P. A eficiência de aquisição de P foi quase duas vezes mais importante que a EUIP, na variabilidade observada em EUP, nos ambientes com baixa disponibilidade de P, e três vezes mais importante naqueles com alta disponibilidade. Programas de melhoramento de milho devem utilizar índices de seleção com peso maior para EAP do que para EUIP, para aumento na EUP. A correlação entre EAP e EUIP não foi significativa em nenhum dos níveis de P. A seleção numa dessas características, portanto, não deve afetar a outra. O principal componente da EUIP foi o quociente de utilização (produção de grãos por unidade de P nos grãos), e não o índice de colheita de P (P nos grãos por unidade de P absorvido). A seleção para reduzir a concentração de P nos grãos deve aumentar o quociente de utilização e conseqüentemente aumentar a EUIP.Termos para indexação: Zea mays, nutrição mineral, aquisição de fósforo, eficiência de uso de fósforo, melhoramento de plantas, quociente de utilização.

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“…They are however in the range observed in other studies of this nature, i.e. of abiotic stress (CIARELLI et al, 1998;FRITSCHE-NETO et al, 2010), indicating good experimental precision and high reliability of the estimates.…”

Section: Resultsmentioning

confidence: 52%

Genetic control of traits associated with phosphorus use efficiency in maize by REML/BLUP

DoVale¹,

Fritsche‐Neto²

2013

Rev. Ciênc. Agron.

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Genetic variation among maize genotypes for phosphorus‐uptake and phosphorus‐use efficiency in nutrient solution

Cited by 30 publications

References 14 publications

Effects of phosphorus concentration on adaptive mechanisms of high- and low-P efficiency soybean genotypes when grown in solution

Effects of phosphorus concentration on adaptive mechanisms of high- and low-P efficiency soybean genotypes when grown in solution

Phosphorus acquisition and internal utilization efficiency in tropical maize genotypes

Genetic control of traits associated with phosphorus use efficiency in maize by REML/BLUP

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