Increased yield stability of field-grown winter barley (Hordeum vulgare L.) varietal mixtures through ecological processes

Creissen, Henry E.; Jørgensen, Tove H.; Brown, J. K. M.

doi:10.1016/j.cropro.2016.03.001

Cited by 61 publications

(39 citation statements)

References 44 publications

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“…Greater yield stability of barley CCPs over a number of reference varieties has also been reported by Soliman and Allard [36], indicating the potential use of CCPs to create cultivars characterized by low GEI. Creissen et al [38] working on winter barley mixtures, found increased yield stability of two barley mixtures over two pure lines varieties for the dynamic stability measure W 2 . The reference variety 'Capo' in our study also displayed a high degree of yield stability, tending towards adaptation to less favorable environments (greater GEI) and high stability in terms of environmental variance (EV i , static stability) and I i , particularly in comparison to the CCPs under conventional management.…”

Section: Discussionmentioning

confidence: 99%

“…The mechanisms of compensation, complementation, and facilitation have been given as ecological processes, which may increase stability in genetically diverse populations [2,38,40,71]. Although the exact mechanisms that inferred better stability to the OYQII CCP in particular are unknown, the German CCPs showed remarkable resilience and compensation effects in the experimental year of 2011/2012 [43], when the severe black frost in February 2012, followed by a drought described above occurred.…”

Section: Discussionmentioning

confidence: 99%

“…Clay and Allard [35], working with barley varietal mixtures, reported that there was either no effect of increased diversity on yield stability or that although varietal mixtures resulted in a small yield advantage over the mean of their components, yield stability was found to be lower. However, a number of researchers report on greater yield stability in more genetically diverse crop material in both barley [19,29,[36][37][38] and wheat [39,40]. Positive effects of genetically diverse cropping systems on yield stability in general have also been reported [41,42].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heterogeneous Winter Wheat Populations Differ in Yield Stability Depending on their Genetic Background and Management System

Weedon

Finckh

2019

Sustainability

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Twelve winter wheat composite cross populations (CCPs), based on three genetic backgrounds and maintained at the University of Kassel, Germany, under both organic and conventional management, were assessed for yield performance and stability in comparison to two commercial varieties over eight and 10 experimental years. A number of stability parameters were chosen in order to identify populations with either adaptation to specific environments or broad adaptation across environments. The genetic effects of the CCP parental varieties were clearly present when comparing CCP yield performance in both management systems. Compared to the variety ‘Capo’, CCPs yielded similarly under organic, but poorer under conventional conditions. Under both management systems, CCPs with the broadest or with a more modern (high yielding) genetic base achieved the greatest yield stability, exceeding that of ‘Capo’, and demonstrating the buffering capacity of genetic diversity. CCPs with a genetic background of high yielding parents reacted most strongly to the different environments and apparently diverged under conventional management over time. Possibilities to improve CCPs through the addition of new genetic material while maintaining the benefits of diversity to achieve higher and more stable yields, particularly in light of increasingly unpredictable climatic conditions are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heterogeneous Winter Wheat Populations Differ in Yield Stability Depending on their Genetic Background and Management System

Weedon

Finckh

2019

Sustainability

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“…At the field scale, ecologically inspired approaches invoke the role of diversity at some taxonomic level, which is hypothesised to impart resilience through different taxa having complementary responses to perturbations. Thus, varietal mixtures of a crop can achieve greater yield resilience than mono-varietal plantings (Creissen, Jorgensen & Brown 2016). Yield shows greater resilience to climatic perturbations in more species-rich or more genetically diverse forage systems (Prieto et al 2015), and it is suggested that stocking multiple livestock species might also enhance resilience (Duru & Therond 2015).…”

Section: Approaches To Enhancing Resiliencementioning

confidence: 99%

Resilience and food security: rethinking an ecological concept

et al. 2017

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Reading RG6 6AS, UK Summary 1. Focusing on food production, in this paper we define resilience in the food security context as maintaining production of sufficient and nutritious food in the face of chronic and acute environmental perturbations. In agri-food systems, resilience is manifest over multiple spatial scales: field, farm, regional and global. Metrics comprise production and nutritional diversity as well as socioeconomic stability of food supply. 2. Approaches to enhancing resilience show a progression from more ecologically based methods at small scales to more socially based interventions at larger scales. At the field scale, approaches include the use of mixtures of crop varieties, livestock breeds and forage species, polycultures and boosting ecosystem functions. Stress-tolerant crops, or with greater plasticity, provide technological solutions. 3. At the farm scale, resilience may be conferred by diversifying crops and livestock and by farmers implementing adaptive approaches in response to perturbations. Biodiverse landscapes may enhance resilience, but the evidence is weak. At regional to global scales, resilient food systems will be achieved by coordination and implementation of resilience approaches among farms, advice to farmers and targeted research. 4. Synthesis. Threats to food production are predicted to increase under climate change and land degradation. Holistic responses are needed that integrate across spatial scales. Ecological knowledge is critical, but should be implemented alongside agronomic solutions and socio-economic transformations.

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“…Mixed cropping enhanced the complementarity between plant types and populations, improved the population canopy structure, and increased use of the space and natural resources (Daellenbach et al, 2005; Wei et al, 2011). It can also contribute to controlling the occurrence of pests and diseases (Mundt, 2002; Newton and Guy, 2009) and increase yield and yield stability (Creissen et al, 2016). Zhu et al (2000) reported that intraspecific crop diversification can control disease.…”

mentioning

confidence: 99%

Mixed Cropping of Different Hybrids of Maize Optimizes Canopy Structure and Promotes Higher Grain Yield

Zhang

et al. 2019

Agronomy Journal

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Under high‐density planting, mixed cropping planting pattern can potentially optimize maize (Zea mays L.) canopy architecture and ultimately improve grain yield. The objectives of this study were to evaluate the effects of three plant patterns combined with three plant population densities (67,500, 82,500, and 97,500 plants·ha−1) on canopy architecture and grain yield. Zhengdan 958 (ZD958) and Denghai 605 (DH605) were used as experimental materials. Three different planting patterns were: mixture (M), random sowing after mixing seeds of the two hybrids in the same proportion; 1:1, one row of ZD958 and one row of DH605; and two monoculture systems, SZD958 and SDH605, as controls. A 3‐yr study demonstrated that the mixed cropping treatments (M and 1:1) at low density (LD) showed no significant difference on light transmission, leaf area index (LAI), canopy apparent photosynthesis (CAP), and canopy respiration (CR), compared with the two monocultures. However, at a medium and high density (MD and HD), mixed cropping was characterized with higher light transmission to the ear and lower layers of the canopy during grain filling than that of monoculture treatments, while no significant differences between M and 1:1 treatments. Moreover, mixed cropping treatments maintained a higher LAI, CAP, lower CR, and increased the whole and post‐silking dry matter accumulation. Grain yields were higher under mixed cropping at MD and high density (HD), while no significant differences between M and 1:1 treatments. Relative to SZD958 and SDH605, the grain yields in the M treatment were 10% and 8% higher at MD, and 7% and 5% higher at HD, respectively. Mixed cropping optimized the canopy structure, maintained higher LAI and CAP during the grain filling period, reduced respiration, and increased aboveground dry matter at maturity. These improvements also result in higher grain yield. Core Ideas Mixed cropping facilitated the formation of a high‐efficiency canopy structure. Mixed cropping delayed the rate of leaf senescence, maintained higher LAI and CAP during the grain filling period. Mixed cropping increased aboveground dry matter weight at physiological maturity, and ultimately led to higher grain yield, especially medium density.

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Increased yield stability of field-grown winter barley (Hordeum vulgare L.) varietal mixtures through ecological processes

Cited by 61 publications

References 44 publications

Heterogeneous Winter Wheat Populations Differ in Yield Stability Depending on their Genetic Background and Management System

Heterogeneous Winter Wheat Populations Differ in Yield Stability Depending on their Genetic Background and Management System

Resilience and food security: rethinking an ecological concept

Mixed Cropping of Different Hybrids of Maize Optimizes Canopy Structure and Promotes Higher Grain Yield

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