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Gautam RK, Singh PK, Venkatesan K, Rakesh B, Sakthivel K, Swain S, Srikumar M, Zamir Ahmed SK, Devakumar K, Rao SS, Vijayan J, Ali S, Langyan S. Harnessing intra-varietal variation for agro-morphological and nutritional traits in a popular rice landrace for sustainable food security in tropical islands. Front Nutr 2023; 10:1088208. [PMID: 36908925 PMCID: PMC9995847 DOI: 10.3389/fnut.2023.1088208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/19/2023] [Indexed: 02/25/2023] Open
Abstract
Introduction Rice crop meets the calorie and nutritional requirements of a larger segment of the global population. Here, we report the occurrence of intra-varietal variation in a popular rice landrace C14-8 traditionally grown under the geographical isolation of the Andaman Islands. Methods Based on grain husk color, four groups were formed, wherein the extent of intra-varietal variation was studied by employing 22 agro-morphological and biochemical traits. Results Among the traits studied, flavonoid and anthocyanin contents and grain yield exhibited a wider spectrum of variability due to more coefficients of variation (>25%). The first five principal components (PCs) of principal components analysis explained a significant proportion of the variation (91%) and the first two PCs explained 63.3% of the total variation, with PC1 and PC2 explaining 35.44 and 27.91%, respectively. A total of 50 highly variable SSR (HvSSR) markers spanning over 12 chromosomes produced 314 alleles, which ranged from 1 to 15 alleles per marker, with an average of 6.28. Of the 314 alleles, 64 alleles were found to be rare among the C14-8 selections. While 62% of HvSSR markers exhibited polymorphism among the C14-8 population, chromosomes 2, 7, 9, and 11 harbored the most polymorphic loci. The group clustering of the selections through HvSSR markers conformed to the grouping based on grain husk coloration. Discussion Our studies on the existence and pertinence of intra-varietal variations are expected to be of significance in the realms of evolutionary biology and sustainable food and nutritional security under the changing climate.
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Affiliation(s)
- Raj Kumar Gautam
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India.,ICAR-National Bureau of Plant Genetic Resources, Pusa, New Delhi, India
| | - Pankaj Kumar Singh
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Kannan Venkatesan
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Bandol Rakesh
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Krishnan Sakthivel
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India.,ICAR-Indian Institute of Oilseed Research, Hyderabad, Telangana, India
| | - Sachidananda Swain
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Muthulingam Srikumar
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - S K Zamir Ahmed
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Kishnamoorthy Devakumar
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India.,ICAR-Sugarcane Breeding Institute, Coimbatore, Tamil Nadu, India
| | - Shyam Sunder Rao
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Joshitha Vijayan
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India.,ICAR-National Institute of Plant Biotechnology, Pusa, New Delhi, India
| | - Sharik Ali
- ICAR-National Bureau of Plant Genetic Resources, Pusa, New Delhi, India
| | - Sapna Langyan
- ICAR-National Bureau of Plant Genetic Resources, Pusa, New Delhi, India
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Zimmerer KS, Jones AD, de Haan S, Creed-Kanashiro H, Tubbeh RM, Hultquist C, Tello Villavicencio MN, Plasencia Amaya F, Nguyen KT. Integrating Social-Ecological and Political-Ecological Models of Agrobiodiversity With Nutrient Management of Keystone Food Spaces to Support SDG 2. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.734943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Agrobiodiversity—the biodiversity of food, agriculture, and land use—is essential to U.N. Sustainable Development Goal 2 by providing crucial food and nutritional quality of diets combined with strengthening agroecological sustainability. Focusing on the agrobiodiversity nexus to SDG 2, the current study utilized the interdisciplinary Agrobiodiversity Knowledge Framework (AKF), household-level surveys, and biodiversity sampling of crop fields and home gardens in a case study in Huánuco, Peru, in 2017. Statistical measures estimated agrobiodiversity of crop fields (n = 268 households) and home gardens (n=159 households) based on species richness (3.7 and 10.2 species/household, in fields and gardens, respectively) and evenness (Shannon diversity index; 0.70 and 1.83 in fields and gardens, respectively). Robust results of Poisson and OLS regression models identified several AKF-guided determinants of agrobiodiversity. Estimated species richness and evenness were significantly associated with 12 social-ecological and political-ecological factors from the four AKF thematic axes: farm characteristics and agroecology; diets and nutrition; markets, governance and sociocultural practices; and global change. This study's AKF approach, agrobiodiversity modeling, agroecological characterization, and field-based case study advanced a series of useful research insights, comparisons, and conceptual innovations to address SDG 2. Characterization of nutrient management through soil- and plant-focused cultural practices and livelihood roles distinguished the “keystone agrobiodiversity-and-food space” of multi-species maize fields (maizales) identified in AKF regression and characterization results. This key space furnished crucial food-nutrition and agroecological benefits that can be expanded by overcoming identified barriers. AKF-guided models incorporating key agrobiodiversity-and-food spaces and ecological nutrient management are needed to strengthen SDG 2 strategies.
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Gibson AK. Genetic diversity and disease: The past, present, and future of an old idea. Evolution 2022; 76:20-36. [PMID: 34796478 PMCID: PMC9064374 DOI: 10.1111/evo.14395] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/03/2021] [Accepted: 10/08/2021] [Indexed: 01/21/2023]
Abstract
Why do infectious diseases erupt in some host populations and not others? This question has spawned independent fields of research in evolution, ecology, public health, agriculture, and conservation. In the search for environmental and genetic factors that predict variation in parasitism, one hypothesis stands out for its generality and longevity: genetically homogeneous host populations are more likely to experience severe parasitism than genetically diverse populations. In this perspective piece, I draw on overlapping ideas from evolutionary biology, agriculture, and conservation to capture the far-reaching implications of the link between genetic diversity and disease. I first summarize the development of this hypothesis and the results of experimental tests. Given the convincing support for the protective effect of genetic diversity, I then address the following questions: (1) Where has this idea been put to use, in a basic and applied sense, and how can we better use genetic diversity to limit disease spread? (2) What new hypotheses does the established disease-diversity relationship compel us to test? I conclude that monitoring, preserving, and augmenting genetic diversity is one of our most promising evolutionarily informed strategies for buffering wild, domesticated, and human populations against future outbreaks.
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Affiliation(s)
- Amanda Kyle Gibson
- Department of Biology University of Virginia Charlottesville Virginia 22903
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Khoury CK, Brush S, Costich DE, Curry HA, de Haan S, Engels JMM, Guarino L, Hoban S, Mercer KL, Miller AJ, Nabhan GP, Perales HR, Richards C, Riggins C, Thormann I. Crop genetic erosion: understanding and responding to loss of crop diversity. THE NEW PHYTOLOGIST 2022; 233:84-118. [PMID: 34515358 DOI: 10.1111/nph.17733] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Crop diversity underpins the productivity, resilience and adaptive capacity of agriculture. Loss of this diversity, termed crop genetic erosion, is therefore concerning. While alarms regarding evident declines in crop diversity have been raised for over a century, the magnitude, trajectory, drivers and significance of these losses remain insufficiently understood. We outline the various definitions, measurements, scales and sources of information on crop genetic erosion. We then provide a synthesis of evidence regarding changes in the diversity of traditional crop landraces on farms, modern crop cultivars in agriculture, crop wild relatives in their natural habitats and crop genetic resources held in conservation repositories. This evidence indicates that marked losses, but also maintenance and increases in diversity, have occurred in all these contexts, the extent depending on species, taxonomic and geographic scale, and region, as well as analytical approach. We discuss steps needed to further advance knowledge around the agricultural and societal significance, as well as conservation implications, of crop genetic erosion. Finally, we propose actions to mitigate, stem and reverse further losses of crop diversity.
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Affiliation(s)
- Colin K Khoury
- International Center for Tropical Agriculture (CIAT), Km 17, Recta Cali-Palmira, Apartado Aéreo 6713, 763537, Cali, Colombia
- Department of Biology, Saint Louis University, 1 N. Grand Blvd, St Louis, MO, 63103, USA
- San Diego Botanic Garden, 230 Quail Gardens Dr., Encinitas, CA, 92024, USA
| | - Stephen Brush
- University of California Davis, 1 Shields Ave., Davis, CA, 95616, USA
| | - Denise E Costich
- International Maize and Wheat Improvement Center (CIMMYT), Carretera México-Veracruz, Km. 45, El Batán, 56237, Texcoco, México
| | - Helen Anne Curry
- Department of History and Philosophy of Science, University of Cambridge, Free School Lane, Cambridge, CB2 3RH, UK
| | - Stef de Haan
- International Potato Center (CIP), Avenida La Molina 1895, La Molina, Apartado Postal 1558, Lima, Peru
| | | | - Luigi Guarino
- Global Crop Diversity Trust, Platz der Vereinten Nationen 7, 53113, Bonn, Germany
| | - Sean Hoban
- The Morton Arboretum, The Center for Tree Science, 4100 IL-53, Lisle, IL, 60532, USA
| | - Kristin L Mercer
- Department of Horticulture and Crop Science, The Ohio State University, Columbus, OH, 43210, USA
| | - Allison J Miller
- Department of Biology, Saint Louis University, 1 N. Grand Blvd, St Louis, MO, 63103, USA
- Donald Danforth Plant Science Center, 975 N Warson Rd, St Louis, MO, 63132, USA
| | - Gary P Nabhan
- Southwest Center and Institute of the Environment, University of Arizona, 1401 E. First St., PO Box 210185, Tucson, AZ, 85721-0185, USA
| | - Hugo R Perales
- Departamento de Agroecología, El Colegio de la Frontera Sur, San Cristóbal, Chiapas, 29290, México
| | - Chris Richards
- National Laboratory for Genetic Resources Preservation, United States Department of Agriculture, Agricultural Research Service, 1111 South Mason Street, Fort Collins, CO, 80521, USA
| | - Chance Riggins
- Department of Crop Sciences, University of Illinois, 331 Edward R. Madigan Lab, 1201 W. Gregory Dr., Urbana, IL, 61801, USA
| | - Imke Thormann
- Federal Office for Agriculture and Food (BLE), Information and Coordination Centre for Biological Diversity (IBV), Deichmanns Aue 29, 53179, Bonn, Germany
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