The Impacts of Interplant Variation on Aboveground Biomass, Grain Yield, and Harvest Index in Maize

Tokatlidis, Ioannis S.; Remountakis, Emmanouel

doi:10.1007/s42106-019-00067-3

Cited by 7 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Still the establishment of PYH as a practical stability index merits further investigation. Interplant inequality intensifies the intraspecific competition and is related to reduced grain yield productivity [60][61][62]. Thus, addressing intraspecific competition may be beneficial for breeding high-yielding varieties [63,64].…”

Section: Implications Of Breeding At the Bdmentioning

confidence: 99%

Plant Yield Efficiency by Homeostasis as Selection Tool at Ultra-Low Density. A Comparative Study with Common Stability Measures in Maize

et al. 2020

Self Cite

View full text Add to dashboard Cite

The study pertains to field experimentation testing seven maize (Zea mays L.) hybrids at four densities, across five locations under normal (NIR) and low-input (LIR) regimes. The main objective was to assess the prognostic value of plant yield efficiency by homeostasis (PYEH) for breeding purposes at ultra-low plant density to predict hybrid yield potential and stability. PYEH comprises plant yield efficiency (PYE) that reflects the ability of individual plants to exploit resources, and plant yield homeostasis (PYH) that indicates the crop’s ability to evade acquired plant-to-plant variability. The same hybrids were also evaluated for stability by commonly used parametric and non-parametric statistics based on data at low (LCD) and high crop densities (HCD). Hybrid stability focused on potential yield loss due to erratic optimum density (OD). Most methods produced conflicting results regarding hybrid ranking for yield and stability especially at LCD. In contrast, PYEH consistently highlighted high-yielding and stable hybrids, potentially able to reach the attainable crop yield (ACY) inter-seasonally irrespective of crop spacing. Low density is common practice under resource-deficit conditions, so crop adaptation to crop spacing is a viable option to overcome erratic OD that constitutes a root source of crop instability in rainfed maize. The results were further supportive of breeding at ultra-low density to facilitate the identification and selection of superior genotypes, since such conditions promote phenotypic expression and differentiation, and ensure repeatability across diverse environments.

show abstract

Section: Implications Of Breeding At the Bdmentioning

confidence: 99%

Plant Yield Efficiency by Homeostasis as Selection Tool at Ultra-Low Density. A Comparative Study with Common Stability Measures in Maize

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The maize was harvested from 2 m 2 area (11 plants) of each subplot to determine the grain yield after natural drying (F. Wang et al., 2021). The harvest index (HI) was calculated using the following formula according to Tokatlidis and Remountakis (2019) (Equation ).

\begin{equation}{\rm{HI}} = \frac{{{\rm{Grain\, yield}}\left( {{\rm{kg\, ha}}^{ - 1}} \right)}}{{{\rm{Biological\, yield}}\left( {{\rm{kg\, ha}}^{ - 1}} \right)}}\end{equation}

…”

Section: Methodsmentioning

confidence: 99%

Interactive effect of water and nitrogen fertilization improve chlorophyll fluorescence and yield of maize

et al. 2022

View full text Add to dashboard Cite

Water scarcity and excessive N fertilization have a negative effect on maize (Zea mays L.) production. Low water and N fertilization are the major problem in sustainable agriculture by limiting crop growth and development. However, the combined effect of N fertilization and supplementary irrigation on chlorophyll fluorescence and maize yield is still not understood. The objective of the study was to signify the effect of supplementary irrigation and N fertilization on leaf area index (LAI), relative chlorophyll content (SPAD), maximum photosynthetic capacity (Fv/Fm), photochemical quenching coefficient (qP), and yield. The experiment was conducted in a split-plot design, with water management in main plot and N fertilization in subplot with three replications. Treatments included two water managements, that is, rainfed (natural rainfall) and irrigation water (70% field capacity). Five N fertilization rates were N0 (0 kg N ha −1 ), N150 (150 kg N ha −1 ), N200 (200 kg N ha −1 ), N250 (250 kg ha −1 ), and N300 (300 kg N ha −1 ). The LAI, SPAD, Fv/Fm, qP, and yield were significantly affected by water management, N rates, and their interaction (P < .05). The LAI, SPAD, Fv/Fm, qP, total dry matter accumulation, and yield under supplementary irrigation were significantly increased by 10. 99, 5.75, 6.57, 9.14, 15.64, and 14.58% than those under rainfed conditions, but the nonphotochemical quenching coefficient was significantly decreased by 22.82%. The 250 kg N ha −1 increased grain yield under irrigated conditions than that of other N treatments. The interaction between water management and N fertilization significantly and positively affected the SPAD, Fv/Fm, and grain yield in both years, but had no significant effect on LAI during 2021 and HI during 2020 and 2021. We concluded that N250 treatment with supplementary irrigation increased grain yield.

show abstract

“…The inverse relationship between the level of interplant variation in yield with mean yield is more likely to be exponential, i.e., the Taylor's Power Law (Döring et al, 2015 ). Even a small increase in plant-to-plant variability from the optimum (lowest) levels may result in substantial yield loss (Tollenaar and Wu, 1999 ; Tokatlidis and Remountakis, 2020 ; Pankou et al, in press ). In pursuing a minimum plant-to-plant variability, the variety is a determinant besides crop management practices.…”

Section: Benefits From the Productive Ideotypementioning

confidence: 99%

Crop resilience via inter-plant spacing brings to the fore the productive ideotype

Tokatlidis

2022

Front. Plant Sci.

View full text Add to dashboard Cite

Natural selection favors the competitive ideotype, enabling native plants to survive in the face of intense competition. The productive ideotype is the goal of artificial selection to achieve high crop yields via the efficient use of resources in a self-competition regime. When breeding is established under inter-genotypic competition, the competitive ideotype dominates and may fictitiously become selectable. The productive ideotype becomes selectable at the nil-competition regime, where widely spaced individuals prevent plant-to-plant interference for any input. Principal reasons bring to the fore the productive ideotype that combines low competitiveness and improved plant yield efficiency. Crop spacing via the productive ideotype is mandated to alleviate the varying optimum density and ensure efficient use of resources inter-seasonally, cope with intra-field variation and optimize resource use, compensate for missing plants and promote stability, counteract unpredictable stresses and offer a buffer against environmental diversity, and adopt low-input agriculture to conserve natural resources and the environment. For breeding toward the productive ideotype, nil-competition is the due condition to overcome the confounding effects of competition, maximize phenotypic differentiation and facilitate selection from an early segregating generation, optimize heritability due to moderated environmental variance and experimental designs that sample spatial heterogeneity, apply high selection pressure focusing exclusively on the targeted genotype, and avoid the risk of bias selection or loss of desired genotypes due to proximity to empty hills. The view of a modern crop variety composed of genotype(s) belonging to the productive ideotype is a viable option to reach crop resilience serving sustainability in enormously fluctuating agroecosystems.

show abstract

The Impacts of Interplant Variation on Aboveground Biomass, Grain Yield, and Harvest Index in Maize

Cited by 7 publications

References 33 publications

Plant Yield Efficiency by Homeostasis as Selection Tool at Ultra-Low Density. A Comparative Study with Common Stability Measures in Maize

Plant Yield Efficiency by Homeostasis as Selection Tool at Ultra-Low Density. A Comparative Study with Common Stability Measures in Maize

Interactive effect of water and nitrogen fertilization improve chlorophyll fluorescence and yield of maize

Crop resilience via inter-plant spacing brings to the fore the productive ideotype

Contact Info

Product

Resources

About