Genotype variation in grain nutrient concentration in tropical maize grown during a rainy and a dry seaon

Feil, B.; Thiraporn, R.; Geisler, G.; Stamp, P.

doi:10.1051/agro:19900903

Cited by 20 publications

(14 citation statements)

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“…The average GNY of CP 1 was 10% lower, but, at the highest rate of N fertilizer, CP 1 accumulated slightly more N in its kernels than did Suwan 2301 which was obviously due to the farmer's higher grain yield. All values agree well with those reported in an earlier study (Feil et al, 1990).…”

Section: Discussionsupporting

confidence: 92%

“…Reports on the intercultivar relationship between grain yield and GNC in maize are very contradictory (Dudley et al, 1977;Eberhard, 1977;Feil et al, 1990;Frey, 1977;Gupta et al, 1975;Kauffman and Dudley, 1979). The results of this investigation clearly confirm our earlier conclusion that genotypes of comparable yielding ability and of similar maturity can show considerable differences in GNC (Feil et al, 1990).…”

Section: Discussionsupporting

confidence: 83%

“…In an earlier study, we reported a considerable genotypic variation in nitrogen, phosphorus and potassium concentrations in the grains of highyielding tropical maize (Feil et al, 1990). This variability could be exploited to save the nutrient resources of soils.…”

Section: Introductionmentioning

confidence: 91%

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Can maize cultivars with low mineral nutrient concentrations in the grains help to reduce the need for fertilizers in third world countries?

1992

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An earlier study revealed considerable genotypic variation in grain N, P and K concentrations (GNC, GPC and GKC, respectively) in tropical maize. The expression of varietal differences in GNC, GPC and GKC, however, may depend on environmental conditions such as the N status of the soil. Two tropical maize hybrids (Suwan 2301 and CP 1) with comparable yielding capacity, but contrasting GNCs, GPCs and GKCs, were therefore grown at four levels of N in a field experiment at Farm Suwan (Thailand, latitude 14.5°N). Suwan 2301 exhibited a higher GNC than did CP 1 at all rates of N, but large differences in GPC and GKC were found only at high N fertilization. This was obviously due to individual grain yield responses of the cultivars to increasing rates of N fertilizer, demonstrating that grain nutrient concentrations are, at least in part, functions of the amount of grain carbohydrates which dilute a genetically and environmentally fixed amount of grain P and K. As compared to Suwan 2301, CP 1 accumulated less N, P and K in the grains at almost all levels of N fertilization, confirming our hypothesis that the cultivation of maize genotypes with low grain mineral nutrient concentrations may help third-world cash-crop farmers to reduce the need for scarce and costly mineral fertilizers. This finding has to be verified at reduced availability of soil -P, -K, and water.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 83%

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Can maize cultivars with low mineral nutrient concentrations in the grains help to reduce the need for fertilizers in third world countries?

1992

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“…By modeling the entire plant, nonintuitive bottlenecks in N metabolism can be determined, which then can be used to suggest genetic interventions through mutagenesis, transgenic technology, or maker-assisted selection to increase the NUE in maize. In addition, the flow of sugars to the kernel tissue can be analyzed to guide the increase of carbohydrate/sugar content of maize kernel by breaking the inverse relationship existing between carbohydrates and proteins (Feil et al, 1990). Apart from its crucial role as a food crop, maize is also used for cellulosic biofuels.…”

Section: Resultsmentioning

confidence: 99%

Assessing the Metabolic Impact of Nitrogen Availability Using a Compartmentalized Maize Leaf Genome-Scale Model

et al. 2014

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Maize (Zea mays) is an important C 4 plant due to its widespread use as a cereal and energy crop. A second-generation genomescale metabolic model for the maize leaf was created to capture C 4 carbon fixation and investigate nitrogen (N) assimilation by modeling the interactions between the bundle sheath and mesophyll cells. The model contains gene-protein-reaction relationships, elemental and charge-balanced reactions, and incorporates experimental evidence pertaining to the biomass composition, compartmentalization, and flux constraints. Condition-specific biomass descriptions were introduced that account for amino acids, fatty acids, soluble sugars, proteins, chlorophyll, lignocellulose, and nucleic acids as experimentally measured biomass constituents. Compartmentalization of the model is based on proteomic/transcriptomic data and literature evidence. With the incorporation of information from the MetaCrop and MaizeCyc databases, this updated model spans 5,824 genes, 8,525 reactions, and 9,153 metabolites, an increase of approximately 4 times the size of the earlier iRS1563 model. Transcriptomic and proteomic data have also been used to introduce regulatory constraints in the model to simulate an N-limited condition and mutants deficient in glutamine synthetase, gln1-3 and gln1-4. Model-predicted results achieved 90% accuracy when comparing the wild type grown under an N-complete condition with the wild type grown under an N-deficient condition.

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“…This interest has intensified recently with efforts to develop value‐added hybrids for animal feed and processing applications such as ethanol production. Numerous studies have documented genetic variability for kernel composition traits in maize (Pollmer et al, 1978; Feil et al, 1990; Dudley and Lambert, 1992), but breeding progress has been limited by an apparent inverse genetic relationship between grain yield and protein concentration in the cereals (reviewed in Simmonds, 1995; and in Feil, 1997). It has also been demonstrated, however, that both grain yield and grain protein respond positively to supplemental N fertilizer, and this paradox suggests that studying the interactive effects of genotype and N availability should provide insights into the genetic and physiological mechanisms that underlie the negative yield–protein relationship.…”

Section: Grain Composition Of the Protein Strains Inbred Parents For mentioning

confidence: 99%

Grain Composition and Productivity of Maize Hybrids Derived from the Illinois Protein Strains in Response to Variable Nitrogen Supply

2004

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The Illinois Long‐Term Protein Selection strains of maize (Zea mays L.) have been employed in a variety of studies investigating the genetic and physiological control of maize grain composition. These prior studies, however, have not assessed the grain composition and yield potential of these strains in hybrid combinations with an elite tester, or in response to supplemental N. Our objective was to study the interactive effect of genotype and N supply on productivity and grain quality for hybrids with a wide divergence in grain protein. Hybrids derived from the Illinois Protein Strains were evaluated in a 2‐yr field experiment where N rates were varied from 0 to 235 kg ha−1 (in eight 34‐kg increments), along with a current commercial hybrid sharing the same female parent (FR1064). The Illinois Protein Strain hybrids produced grain protein concentrations that reflected the strain parents, with all hybrids except Illinois Low Protein showing increased grain protein in response to increasing N supply. Many other strain attributes were also manifested at the hybrid level, including the relative differences in kernel weights and the inverse relationship between grain protein to both starch concentration and grain yield. Nitrogen supply positively enhanced grain yield in all hybrids, primarily by increasing kernel number. Nitrogen supply also impacted the yield–protein relationship by stimulating protein synthesis rather than by inhibiting starch production. These results demonstrate the strong genetic control of grain composition in maize hybrids, which can be modulated by the positive effects of N on reproductive sink capacity and seed protein synthesis.

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Genotype variation in grain nutrient concentration in tropical maize grown during a rainy and a dry seaon

Abstract: Summary — A set of 12 tropical maize cultivars was screened for grain nitrogen, phosphorus, and potassium concentration (GNC, GPC and GKC). The (fig 1a-f). Les hybrides KUH 2301 et KUH 2602 ont été identifiés comme cultivars à haut rendement et haut GNC (fig 1a, b). Mais

Cited by 20 publications

References 12 publications

Can maize cultivars with low mineral nutrient concentrations in the grains help to reduce the need for fertilizers in third world countries?

Can maize cultivars with low mineral nutrient concentrations in the grains help to reduce the need for fertilizers in third world countries?

Assessing the Metabolic Impact of Nitrogen Availability Using a Compartmentalized Maize Leaf Genome-Scale Model

Grain Composition and Productivity of Maize Hybrids Derived from the Illinois Protein Strains in Response to Variable Nitrogen Supply

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