Stay-green QTLs in temperate elite maize

Kante, Moctar; Revilla, Pedro; Fuente, María de la; Caicedo, Marlon; Ordás, Bernardo

doi:10.1007/s10681-015-1575-0

Cited by 14 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, δ had a larger effect than MA big , due to the timing of the drought stress that impacted mostly the thousand kernel weight and harvest grain moisture through an earlier senescence and a shorter grain filling period (Çakir, 2004; Li et al, 2018; Mangani et al, 2018). Previous works (Cairns et al, 2012; Kante et al, 2016; Yang et al, 2017b) have also pointed out that stay-green is one of the major determinant of grain yield, and can explain from 7 to 12% of its variation, which is very similar to the magnitude of δ effect in this study (Table 4). Finally, it is noteworthy that MA big and δ are strongly negatively correlated in both stressed and well-watered environments (Supplementary Figure 4).…”

Section: Resultssupporting

confidence: 89%

A High-Throughput Model-Assisted Method for Phenotyping Maize Green Leaf Area Index Dynamics Using Unmanned Aerial Vehicle Imagery

Blancon

Dutartre²,

Tixier

et al. 2019

Front. Plant Sci.

View full text Add to dashboard Cite

The dynamics of the Green Leaf Area Index (GLAI) is of great interest for numerous applications such as yield prediction and plant breeding. We present a high-throughput model-assisted method for characterizing GLAI dynamics in maize ( Zea mays subsp. mays ) using multispectral imagery acquired from an Unmanned Aerial Vehicle (UAV). Two trials were conducted with a high diversity panel of 400 lines under well-watered and water-deficient treatments in 2016 and 2017. For each UAV flight, we first derived GLAI estimates from empirical relationships between the multispectral reflectance and ground level measurements of GLAI achieved over a small sample of microplots. We then fitted a simple but physiologically sound GLAI dynamics model over the GLAI values estimated previously. Results show that GLAI dynamics was estimated accurately throughout the cycle (R 2 > 0.9). Two parameters of the model, biggest leaf area and leaf longevity, were also estimated successfully. We showed that GLAI dynamics and the parameters of the fitted model are highly heritable (0.65 ≤ H 2 ≤ 0.98), responsive to environmental conditions, and linked to yield and drought tolerance. This method, combining growth modeling, UAV imagery and simple non-destructive field measurements, provides new high-throughput tools for understanding the adaptation of GLAI dynamics and its interaction with the environment. GLAI dynamics is also a promising trait for crop breeding, and paves the way for future genetic studies.

show abstract

Section: Resultssupporting

confidence: 89%

A High-Throughput Model-Assisted Method for Phenotyping Maize Green Leaf Area Index Dynamics Using Unmanned Aerial Vehicle Imagery

Blancon

Dutartre²,

Tixier

et al. 2019

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Several QTLs related to leaf angle have been identified in maize and rice ( [172] and references therein), bread wheat [173][174][175], and durum wheat [176], as well as genes associated with changes in leaf angle in maize, rice, and sorghum [172]. On the other hand, the association between QTLs and stay-green has been reported in wheat [137,143,177,178], maize [140,[179][180][181][182], barley [141], sorghum [183][184][185][186], and rice [187]. In the same way, the association between chlorophyll content in the flag leaf and the magnitude of the net assimilation of CO 2 has been reported, and QTLs for chlorophyll content and photosynthesis have been identified in rice [188], wheat [163,189], and barley [167,190].…”

Section: Photosynthesis-based Breeding Under the Scenario Of Global Cmentioning

confidence: 99%

Photosynthetic Metabolism under Stressful Growth Conditions as a Bases for Crop Breeding and Yield Improvement

Morales

Ancín

Fakhet

et al. 2020

Plants

127

View full text Add to dashboard Cite

Increased periods of water shortage and higher temperatures, together with a reduction in nutrient availability, have been proposed as major factors that negatively impact plant development. Photosynthetic CO2 assimilation is the basis of crop production for animal and human food, and for this reason, it has been selected as a primary target for crop phenotyping/breeding studies. Within this context, knowledge of the mechanisms involved in the response and acclimation of photosynthetic CO2 assimilation to multiple changing environmental conditions (including nutrients, water availability, and rising temperature) is a matter of great concern for the understanding of plant behavior under stress conditions, and for the development of new strategies and tools for enhancing plant growth in the future. The current review aims to analyze, from a multi-perspective approach (ranging across breeding, gas exchange, genomics, etc.) the impact of changing environmental conditions on the performance of the photosynthetic apparatus and, consequently, plant growth.

show abstract

“…Studies have shown that lower soil temperature postponed root senescence (Bu et al, 2013; Li et al, 1999) and promoted crop root growth (Pandey et al, 2015). Plant leaf senescence is also closely related to root growth (Kante et al, 2016). So, it is not surprising that higher seed yield associates with mulch application.…”

Section: Discussionmentioning

confidence: 99%

Ridge‐Furrow Planting System and Wheat Straw Mulching Effects on Dryland Sunflower Yield, Soil Temperature, and Moisture

2019

View full text Add to dashboard Cite

The current study uses 2‐yr trial data set to investigate the impacts of ridge‐furrow planting system and wheat (Triticum aestivum L.) straw mulching on sunflower (Helianthus annuus L.) yield and some soil parameters. Field experiments were conducted in 2014 and 2015 in two different locations (Tehran and Mashhad Provinces, Iran). The experiments were laid out in a randomized complete block design comprised of four treatments, including control that is, neither ridge‐furrow planting system nor wheat straw mulching (RF0M0); ridge‐furrow planting system without wheat straw mulching (RF1M0); ridge‐furrow planting system with wheat straw mulching only covering 50% of the soil surface (RF1M50); and ridge‐furrow planting system with full covering (100%) of the soil surface with wheat straw mulch (RF1M100). The RF1M0 treatment could not increase sunflower yield, but the application of 50 and 100% wheat straw mulch significantly increased seed yield by10 and 18%, respectively. For both years and sites, on average the maximum seed yield was found with the RF1M100 treatment (1629 kg ha−1), while the minimum value (1318 kg ha−1) was related to RF0M0 treatment. Wheat straw mulching reduced soil temperature and increased soil water storage, organic C and microbial biomass C. We concluded that the ridge‐furrow planting system with full coverage of the soil surface with wheat straw mulch could be critical in the cultivation of sunflower under arid and semiarid areas, where water is the most important factor in determining plant growth and yield. Core Ideas Ridge‐furrow system promoted sunflower seed yield, applying straw mulch further increased yield. Improved sunflower yield was explained by optimized water supply and thermal balance. Wheat straw mulch could reduce risk of heat stress. Application of wheat straw mulching improved soil biological properties. The RF1M100 effectively increased soil water storage and biomass accumulation.

show abstract

Stay-green QTLs in temperate elite maize

Cited by 14 publications

References 29 publications

A High-Throughput Model-Assisted Method for Phenotyping Maize Green Leaf Area Index Dynamics Using Unmanned Aerial Vehicle Imagery

A High-Throughput Model-Assisted Method for Phenotyping Maize Green Leaf Area Index Dynamics Using Unmanned Aerial Vehicle Imagery

Photosynthetic Metabolism under Stressful Growth Conditions as a Bases for Crop Breeding and Yield Improvement

Ridge‐Furrow Planting System and Wheat Straw Mulching Effects on Dryland Sunflower Yield, Soil Temperature, and Moisture

Contact Info

Product

Resources

About