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Kevin Murphy   Dr.  Institute, Department or Faculty Head 
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Kevin Murphy published an article in June 2016.
Top co-authors
Craig F. Morris

81 shared publications

Didier Bazile

13 shared publications

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Article 1 Read 3 Citations Quinoa Seed Quality Response to Sodium Chloride and Sodium Sulfate Salinity Geyang Wu, Adam J. Peterson, Craig F. Morris, Kevin M. Murph... Published: 03 June 2016
Frontiers in Plant Science, doi: 10.3389/fpls.2016.00790
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Quinoa (Chenopodium quinoa Willd.) is an Andean crop with an edible seed that both contains high protein content and provides high quality protein with a balanced amino acid profile in embryonic tissues. Quinoa is a halophyte adapted to harsh environments with highly saline soil. In this study, four quinoa varieties were grown under six salinity treatments and two levels of fertilization, and then evaluated for quinoa seed quality characteristics, including protein content, seed hardness, and seed density. Concentrations of 8, 16, and 32 dS m-1 of NaCl and Na2SO4, were applied to the soil medium across low (1 g N, 0.29 g P, 0.29 g K per pot) and high (3 g N, 0.85 g P, 0.86 g K per pot) fertilizer treatments. Seed protein content differed across soil salinity treatments, varieties, and fertilization levels. Protein content of quinoa grown under salinized soil ranged from 13.0 to 16.7%, comparable to that from non-saline conditions. NaCl and Na2SO4 exhibited different impacts on protein content. Whereas the different concentrations of NaCl did not show differential effects on protein content, the seed from 32 dS m-1 Na2SO4 contained the highest protein content. Seed hardness differed among varieties, and was moderately influenced by salinity level (P = 0.09). Seed density was affected significantly by variety and Na2SO4 concentration, but was unaffected by NaCl concentration. The samples from 8 dS m-1 Na2SO4 soil had lower density (0.66 g/cm3) than those from 16 dS m-1 and 32 dS m-1 Na2SO4, 0.74 and 0.72g/cm3, respectively. This paper identifies changes in critical seed quality traits of quinoa as influenced by soil salinity and fertility, and offers insights into variety response and choice across different abiotic stresses in the field environment.
Article 1 Read 5 Citations Development of a Worldwide Consortium on Evolutionary Participatory Breeding in Quinoa Kevin M. Murphy, Didier Bazile, Julianne Kellogg, Maryam Rah... Published: 09 May 2016
Frontiers in Plant Science, doi: 10.3389/fpls.2016.00608
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Chenopodium quinoa is gaining global importance due to its excellent protein quality and tolerance of abiotic stresses. The last 60 years have seen major strides in the expansion of quinoa crop production and experimentation. Quinoa’s wide genetic diversity has led to its agronomic versatility and adaptation to different soil types, particularly saline soils, and environments with extremely variable conditions in terms of humidity, altitude, and temperature. The potential of quinoa to contribute to global food security was recognized in 2013 in the declaration of the International Year of Quinoa (IYQ). Promoting the use of improved homogeneous quinoa varieties standardized to comply with applicable norms on seeds or suited to intensified conventional agriculture farming systems may not generate the necessary resilience needed to respond to current and future global challenges. Maintaining and increasing quinoa biodiversity is imperative, as the dynamics of the global expansion of quinoa may constitute a threat to farmers if the spread is generated with a narrow genetic base. In this article, we propose that the method of evolutionary participatory breeding could be a useful tool to develop new quinoa genetic material in cooperation with farmers. We introduce preliminary results on quinoa population development with farmers in the Pacific Northwest region of the USA. We conclude that a global collaborative network on quinoa (GCN-Quinoa) could be the baseline for participatory plant breeding programs originating in developing or developed countries to meet the needs of farmers across a diversity of agronomic systems and a wide range of physical environments.
BOOK-CHAPTER 2 Reads 3 Citations Evolutionary Breeding and Climate Change Kevin M. Murphy, Arron H. Carter, Stephen S. Jones Published: 01 January 2013
Genomics and Breeding for Climate-Resilient Crops, doi: 10.1007/978-3-642-37045-8_9
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The genetic uniformity within, and typified by, most monocultural cereal-based systems has been shown to limit the crops’ capacity to evolve in response to adverse environmental conditions, thereby leading to a possible decrease in the yield stability of the cropping system. Deployment of significantly increased crop diversity across the global landscape has the potential to reduce the progress of crop epidemics, optimize yield stability, and positively enhance crop resilience in the ever-changing visage of climate-induced stress. One method of increasing genetic diversity within cereal crop populations is through evolutionary breeding (EB). In EB populations of self-pollinating cereals, natural selection acts upon the heterogeneous mixture of genotypes over generations and across environments and traits positively correlated to reproductive capacity increase over time. Crop populations with enhanced genetic diversity mimic natural ecological communities, which are better equipped to adapt to future unpredictable temporal climate shifts than are monocultures. Evolutionary participatory breeding merges the EB method with farmer selection to develop high-yielding, disease-resistant cultivars while maintaining a high degree of genetic variation to allow for adaptability to fluctuations in environmental conditions. The EB method can contribute to the development of cropping systems with greater resilience and yield stability in the climate change era.