Genetic Variation for Nitrogen-Use Efficiency Among Selected Tropical Maize Hybrids Differing in Grain Yield Potential

Abe, Ayodeji; Menkir, Abebe; Moose, Stephen P.; Adetimirin, Victor O.; Olaniyan, Amudalat Bolanle

doi:10.1080/15427528.2012.721483

Cited by 12 publications

(7 citation statements)

References 30 publications

(40 reference statements)

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“…In this study, we observed low GY at low N supply across sites, consistent with the results of Abe et al (2013); Cormier et al (2013) and Pang et al (2013). Unlike previous studies, however, here we explored genetic variation for NUE under low-yielding conditions where productivity is severely limited by moisture stress.…”

Section: Discussionsupporting

confidence: 76%

“…In line with previous reports (Bertin and Gallais 2001;An et al 2006;Asplund et al 2014), our study demonstrated that there is significant genetic variation for NUE between wheat genotypes. Abe et al (2013) also demonstrated significant genetic variation for GY and measured NUE component traits among maize hybrids at increasing rates of N application. In another recent study, the genetic progress for NUE in winter wheat was assessed in two hundred and twenty-five elite European varieties at four sites under two levels of N application (Cormier et al 2013).…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Australian wheat genotypes for response to variable nitrogen application

Mahjourimajd

Kuchel²,

Langridge

et al. 2015

Plant Soil

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Aims The key aim was to assess the genetic variation for nitrogen (N) response and stability in spring wheat germplasm to determine the scope for improvement of nitrogen use efficiency (NUE) under water-limited, low yielding conditions. A further aim was to evaluate NUE stability and NUE-protein yield (PY) as suitable NUErelated traits for selection. Methods The traits measured included grain yield (GY, kg ha) and NUE (kg GY kg −1 N) under varying N applications at all sites, and NUE for protein yield (NUE-PY), harvest index and plant height at some sites.In addition, two of the trials used two seeding rates to provide an assessment of the impact of plant density on NUE.Results Genetic variation was significant for all traits studied. Grain yield was affected by both genotype (G) and N rate and the interaction between the two. Interestingly, harvest index and height showed no direct response to varying N applications. However, for these traits, there was a significant G effect and N response (G × N interaction).Conclusions Increasing N inputs led to variable responses for GY at different sites. Importantly, genetic variation in N response was detected. The information and screening techniques will enable plant breeders to select wheat genotypes that show a consistent response to high N. There is clear scope to improve NUE in spring wheat grown in low yielding environments.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Evaluation of Australian wheat genotypes for response to variable nitrogen application

Mahjourimajd

Kuchel²,

Langridge

et al. 2015

Plant Soil

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“…Similarly, in this study, the correlation between Yield+N and Yield-N was +0.31. Hybrid correlation coefficients between Yield+N and NUE, NUpE, and NUtE were +0.74, +0.64, and +0.44, respectively, in agreement with reports that these traits are frequently positively correlated [12,37]. On the other hand, Yield-N was positively correlated with HI-N, HI+N, NHI+N, and GU.…”

Section: Phenotypic Variation Of N-use Traitssupporting

confidence: 91%

Genetic Variation of Nitrogen Use Traits Using Maize Expired Plant Variety Protection Germplasm

Mastrodomenico¹,

Hendrix²,

Below³

2017

Preprint

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“…Similarly, in this study, the correlation between Yield +N and Yield −N was +0.31. Hybrid correlation coefficients between Yield +N and NUE, NUpE, and NUtE were +0.74, +0.64, and +0.44, respectively, which is in agreement with reports that these traits are frequently positively correlated [20,46]. On the other hand, Yield −N was positively correlated with HI −N , HI +N , NHI +N , and GU.…”

Section: Phenotypic Variation Of N-use Traitssupporting

confidence: 81%

Nitrogen Use Efficiency and the Genetic Variation of Maize Expired Plant Variety Protection Germplasm

2018

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Nitrogen use efficiency (NUE) in maize (Zea mays L.) is an important trait to optimize yield with minimal input of nitrogen (N) fertilizer. Expired Plant Variety Protection (ex-PVP) Act-certified germplasm may be an important genetic resource for public breeding sectors. The objectives of this research were to evaluate the genetic variation of N-use traits and to characterize maize ex-PVP inbreds that are adapted to the U.S. Corn Belt for NUE performance. Eighty-nine ex-PVP inbreds (36 stiff stalk synthetic (SSS), and 53 non-stiff stalk synthetic (NSSS)) were genotyped using 26,769 single-nucleotide polymorphisms, then 263 single-cross maize hybrids derived from these inbreds were grown in eight environments from 2011 to 2015 at two N fertilizer rates (0 and 252 kg N ha −1 ) and three replications. Genetic utilization of inherent soil nitrogen and the yield response to N fertilizer were stable across environments and were highly correlated with yield under low and high N conditions, respectively. Cluster analysis identified inbreds with desirable NUE performance. However, only one inbred (PHK56) was ranked in the top 10% for yield under both N-stress and high N conditions. Broad-sense heritability across 12 different N-use traits varied from 0.11 to 0.77, but was not associated with breeding value accuracy. Nitrogen-stress tolerance was negatively correlated with the yield increase from N fertilizer.

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Genetic Variation for Nitrogen-Use Efficiency Among Selected Tropical Maize Hybrids Differing in Grain Yield Potential

Cited by 12 publications

References 30 publications

Evaluation of Australian wheat genotypes for response to variable nitrogen application

Evaluation of Australian wheat genotypes for response to variable nitrogen application

Genetic Variation of Nitrogen Use Traits Using Maize Expired Plant Variety Protection Germplasm

Nitrogen Use Efficiency and the Genetic Variation of Maize Expired Plant Variety Protection Germplasm

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