Assessing Indigenous Knowledge on Diversity, Socio-economy, and On-Farm Management Practices of Different Yam Landraces (Dioscorea cayenensis-rotundata Complex) for Sustainable Production in Southern Ethiopia

Birhanu Kagnew; Awol  Assefa; Messay  Mulugeta; Asfaw  Degu; Wondawek   Abebe; Sebsebe Demissew

doi:10.15451/ec2025-07-14.27-1-37

Authors

Birhanu Kagnew Hawassa University
Awol Assefa Addis Ababa University
Messay Mulugeta Addis Ababa University
Asfaw Degu Addis Ababa University
Wendawek Abebe Addis Ababa University
Sebsebe Demissew Addis Ababa University

DOI:

https://doi.org/10.15451/ec2025-07-14.27-1-37

Keywords:

Ethiopia, yam landraces, diversity, sustainable production, socio-economic importance, on-farm management, indeginous knowledge

Abstract

World’s agriculture mainly relies on cereal crops (e.g., wheat), often overlooking tuber and root crops like yams. Yams are nutritious, climate-resilient, and vital for food security, especially in Sub-Saharan Africa and Southeast Asia. Ethiopia's yam production is crucial for sustainable agriculture, improving nutrition, and significantly enhancing food security. However, research on biotic and abiotic factors affecting Ethiopia's yam production and distribution is limited. This study investigates yam on-farm management practices, conservation status, production constraints, socio-economic importance, and indigenous farming knowledge. The study involved 1125 households in three districts and 14 Kebeles, using interviews, questionnaires (kobo toolbox software, version, 2.4), focus group discussions, and landrace counts at farm levels. The study utilized two-way ANOVA (p < 0.05), Shannon diversity index, evenness, Simpson’s diversity index, and Sorenson’s similarity index. The results highlighted several constraints affecting yam distribution and production, including drought and climate change (97.78%), lack of sustainable seed source (95.64%), market chain issues (92%), high production costs (87.91%), labor cost (73.51%), disease and animal attack (95.64%), staking material (98.76%), tediousness of the practice (95.29%), farmland scarcity (96.27%), lack of training (98.93%), awareness (72.53%), modern storage (84.44%), agro-chemicals (99.73%), new technology (68.44%), credit access (95.56%), and lack of optimized fertilizer rate. Despite strong preference for yam production (70.93%), trends indicate a decline (77.51%) due to these factors. The study identified 27 yam landraces, with Basketo Zone and Wadha Kebele exhibiting the highest diversity (43.30%), and abundance (4.03 ± 1.65) respectively, while 85.71% of the landraces were common across Kebeles. The organization of yam landrace communities is undergoing significant changes due to both natural and human-induced disturbances across all study sites. Consequently, most yam landraces are now cultivated in small plots by a few farmers, highlighting the need for interventions that support on-farm conservation while aligning with farmers' interests to preserve yam diversity.

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References

Agidew AMA, Singh KN (2018) Determinants of food insecurity in the rural farm households in South Wollo Zone of Ethiopia: the case of the Teleyayen sub-watershed. Agri. Food Econ. 6: 1–23. DOI: https://doi.org/10.1186/s40100-018-0106-4

Available online: https://www.fao.org/4/y9421e/y9421e05.htm (accessed on 6 December 2024).

Baressa A, Itefa D (2019) Ethnobotany and Nutritional Value of Two Domestic Yams (Dioscorea spp.) in Abaya Woreda, Southern Ethiopia. Ethnobot. Res. Appl. 18: 1–10. DOI: https://doi.org/10.32859/era.18.9.1-10

Belachew G, Bewuketu H, Aklilu A (2017) Distribution, Diversity and Potential Production of Yams (Dioscorea spp.) in Sheko District, Southwest Ethiopia. Am. J. Life Sci. 5: 86–92. DOI: https://doi.org/10.11648/j.ajls.20170503.12

Bhandari MR, Kasai T, Kawabata J (2003) Nutritional Evaluation of Wild Yam (Dioscorea spp.) Tubers of Nepal. Food Chem. 82: 619–623. DOI: https://doi.org/10.1016/S0308-8146(03)00019-0

Bikila A, Abraham N, Girma C, Tilahun W, Negash T, Lelise A, Daniel M, Meseret N (2015) Registration of ‘Bulcha’ and ‘Lalo’ Yam Varieties. East Afr. J. Sci. 9: 65–68.

Byerlee DR, De Janvry AF, Klytchnikova II, Sadoulet EML, Townsend R (2008) World Development Report 2008: Agriculture for Development; World Development Report No. 30; World Bank Group: Washington, DC, USA, 2008.

CSA (2007) Central Central Statically Agency Reports on Summary and Statistical Report of the 2007 Population and Housing Census; CSA: Addis Ababa, Ethiopia, 2007.

CSA (2021) Central Statically Agency Reports on Area and Production of Crops (Private Peasant Holdings, Meher Season); CSA: Addis Ababa, Ethiopia, 2021.

CSA (2020) Central Statically Agency Reports on Crop Production Forecast Sample Survey on Area and Crop Production Forecast for Major Crops, Meher Season; CSA: Addis Ababa, Ethiopia, 2020.

Demilew D (2022) Food and Nutritional Security Impact of Exploiting Opportunities and Developing Strategies in Increase Yam (Dioscorea Spp.) Production in Ethiopia. J. Genet. Eng. Biotechnol. Res., 4: 230–238. DOI: https://doi.org/10.33140/JGEBR.04.02.08

Ekanayake IJ, Asiedu R (2003) Problems and Perspectives of Yam-based Cropping Systems in Africa. J. Crop Production, 9: 531–558. DOI: https://doi.org/10.1300/J144v09n01_08

FAO (2009) Agricultural Growth in West Africa, Market and Policy Drivers; Frank Hollinger (Food and Agriculture Organization of the United Nations), Michigan State University: East Lansing, MI, USA, 2009.

FAO, IFAD, UNICEF, WFP, WHO (2021) The State of Food Security and Nutrition in the World 2021. Transforming Food Systems for Food Security, Improved Nutrition and Affordable Healthy Diets for All; FAO: Rome, Italy, 2021. https://doi.org/10.4060/cb4474en.

FAOSTAT (2020) Food and Agriculture Organization Corporate Statistical Database (FAOSTAT); FAO: Rome, Italy, 2020. Available online: http://www.fao.org/faostat/en/#data/QC (accessed on 5 December 2022).

Feleke ST, Kilmer RL, Gladwin CH (2005). Determinants of food security in Southern Ethiopia, at the household level. Agric. Econ., 33: 351–363. DOI: https://doi.org/10.1111/j.1574-0864.2005.00074.x

FAO (2018) Food and Agricultural Organization. Cassava Production Guidelines for Food Security and Adaptation to Climate Change in Asia and Africa (No. IAEA-TECDOC-1840); Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture; FAO: Rome, Italy.

Frossard E, Aighewi BA, Aké S, Barjolle D, Baumann P, Bernet T, Dao D, Diby LN, Floquet A, Hgaza VK (2017) The Challenge of Improving Soil Fertility in Yam Cropping Systems of West Africa. Front. Plant Sci. 8(1953): 1-8. DOI: https://doi.org/10.3389/fpls.2017.01953

Hildebrand E, Demissew S, Wilkin P (2002) Local and regional landrace disappearance in species of Dioscorea L. (Yams) in Southwest Ethiopia. In Ethnobiology and Biocultural Diversity, Proceedings of the 7th International Congress of Ethnobiology, Athens, Georgia, USA (23–17 October 2000, in); Stepp, J.R., Wyndham, F.S., Zarger, R.R., Eds; University of Georgia Press: Athens, GA, USA, pp 678–695.

Kothari CR (2004). Sample Size Determination. Research Methodology. New Age Inter. Publ. 1: 74–81.

Lebot V (2009) Tropical Root and Tuber Crops Cassava, Sweet Potato, Yams and Aroids Crop Production Science in Horticulture; CABI: Wallingford, CT, USA, Volume 17.

Lebot V, Faloye B, Okon E, Gueye B (2019) Simultaneous Quantification of Allantoin and Steroidal Saponins in Yam (Dioscorea spp.) Powders. J. App. Res. Med. Aromat. Plants, 13, 8. DOI: https://doi.org/10.1016/j.jarmap.2019.02.001

Magurran AE (1988) Ecological Diversity and Its Measurement; Princeton University Press: Princeton, NJ, USA, pp7–101. DOI: https://doi.org/10.1007/978-94-015-7358-0_6

Massawe FJ, Mayes S, Cheng A, Chai HH, Cleasby PM, Symonds RC, Ho WK, Siise A, Wong QN, Kendabie P., Yanusaa Y, Jamalluddina N, Singha A, Azmanb R, Azam-Ali SN (2015) The Potential for Underutilised Crops to Improve Food Security in the Face of Climate Change. Procedia Environ. Sci. 29: 140–141. DOI: https://doi.org/10.1016/j.proenv.2015.07.228

Matsumoto R, Ishikawa H, Asfaw A, Asiedu R (2021) Low Soil Nutrient Tolerance and Mineral Fertilizer Response in White Guinea Yam (Dioscorea rotundata) Genotypes. Front. Plant Sci. 12: 629762. DOI: https://doi.org/10.3389/fpls.2021.629762

Miege J, Sebsebe D (1997) Dioscoreaceae. In Flora of Ethiopia and Eritrea; Edwards, S., Sebsebe, D., Hedberg, I., Eds.; A Joint Publication of the National Herbarium, Biology Department, AAU, Ethiopia and the Department of Systematic Botany, Uppsala University: Uppsala, Sweden, pp55–62.

Mignouna HD, Abang MM, Asiedu R (2008) Genomics of yams, a common source of food and medicine in the tropics. Genom. Trop. Crop Plants. 1: 549–570. DOI: https://doi.org/10.1007/978-0-387-71219-2_23

Mulualem T, Mekbib F, Hussein S, Gebre E (2022) Yam Production Constraints, Farming Systems and Farmer Preferred Traits in Ethiopia: Implication for Breeding and Conservation. Ethiopia. J. Crop Sci. 9, 185–202.

Muluneh T, Becker HC, Mass BL (2008) Diversity, Distribution and Management of Dam landraces (Dioscorea spp.) in Southern Ethiopia. Genet Resour. Crop Evol. 55: 115–131. DOI: https://doi.org/10.1007/s10722-007-9219-4

Muluneh T, Heiko C, Becker B, Maass L (2011) Comparative analysis of morphological and farmers’ cognitive diversity in yam landraces (Dioscorea spp.) from Southern Ethiopia. Trop. Agr. Dev. 55: 28–43.

Norman M, Peasron C, Searle P (1995) Yams (Discorea species). In The Ecology of Tropical Food Crops; Cambridge University Press: Cambridge, UK, pp 305–318. DOI: https://doi.org/10.1017/CBO9781139172479.018

Nweke FI (2016) Yam in West Africa. Food, Money and More; Michigan State University Press: East Lansing, MI, USA, p187.

Oyetunji OJ, Kabeya M, Shiwachi H (2007) Production of Mini-tubers From Vine Cuttings of White Yam (Dioscorea rotundata). J. Appl. Hortic. 9:167–172. DOI: https://doi.org/10.37855/jah.2007.v09i02.37

Pascual U, Narloch U, Nordhage S, Drucker A.G (2011) The Economics of Agro-biodiversity Conservation for Food Security under Climate Change. Econ. Agrar. Recur. Nat. 11: 191–220.

Petros S, Abay F, Desta GO, Brien C ( 2018) Women farmers’ empowerment compared to men farmers in Ethiopia. World Med. Health Policy. 10: 220–245. DOI: https://doi.org/10.1002/wmh3.280

Sahore GJ, Kamenan NA (2007) Changes in Nutritional Properties of Yam (Dioscorea spp.), Green Plantain (Musa spp.) and Cassava (Manihot esculenta) During Storage. Food Sci. Technol. 47: 81–88. DOI: https://doi.org/10.1002/ts.200

Scott GJ (2020) A review of root, tuber and banana crops in developing countries: past, present and future. Int. J. Food Sci. Techn. 56: 1093–1114. DOI: https://doi.org/10.1111/ijfs.14778

Sebsebe D, Nordal I, Stabbetorp POE (2003) Flowers of Ethiopia and Eritrea: Aloes and other Lilies, 1st ed.; Shama Books: Addis Ababa, Ethiopia.

Simpson EH (1949) Measurement of diversity. Nature. 63, 688. https://doi.org/10.1038/163688a0. DOI: https://doi.org/10.1038/163688a0

Subba HK, Dahal Y, Mafchan BR, Ghalley SK, Koirala BS (2023) The Environment factors influencing abundance and growth of wild yam in broadleaved forest, Tsirang District, Bhutan. Eur. J. Ecol. 9: 23–30. DOI: https://doi.org/10.17161/eurojecol.v9i1.16537

Tchabi A (2010) Efficacy of indigenous arbuscular mycorrhizal fungi for promoting white yam (Dioscorea rotundata) growth in West Africa. Appl. Soil Ecol. 45: 92–100. DOI: https://doi.org/10.1016/j.apsoil.2010.03.001

Temesgen T, Rashid MH (2009) Economic Impact of Climate Change on Crop Production in Ethiopia: Evidence from Cross-section Measures. J. Cent. Study Afr. Econ. (CSAE). 18: 529–554. DOI: https://doi.org/10.1093/jae/ejp002

Tizazu G (2019) Yam landrace diversity and distribution in Basketo and Dera Malo Districts, Southwest Ethiopia. OMO Int. J. Sci. 2:45–58. DOI: https://doi.org/10.59122/1342815

Tsegaye B (2021) Diversity of Cultivated and Wild Yams (Dioscorea spp.) in Southwest Ethiopia Based on Farmers Management Practices, Agro-Morphological Traits and Nutritional Composition. Ph.D dissertation, Hawassa University, Hawassa, Ethiopia.

Viruel J, Cataltaeya M, ShiwMoragues JG (2010) New microsatellite loci in the dwarf yams Dioscorea group Epipetrum (Dioscoreaceae). Am. J. Bot. 97, e121–e123. DOI: https://doi.org/10.3732/ajb.1000304

Wendawek A, Firew K, Feleke W, Sebsibe D, Wilkin P (2021) An Illustrative Guides to the Farmers’ Varieties of Yam (Dioscoria spp.) in Basketo Special District and Adjoining Woredas in Gamo and Wolayta Zones, Southern Ethiopia; Addis Ababa University press: Addis Ababa, Ethiopia, 2021.

Yeshitila M, Temesgen D (2016). Exploration and Collection of Root and Tuber Crops in East Wollega and Ilu Ababora zones. Rescuing Declin. Genet. Resour. Indian J. Trad. Know, 15: 86–92.

Zinash D (2008) Minimizing Postharvest Losses in Yam (Dioscorea spp.): Treatments and Techniques. In: Using Food Science and Technology to Improve Nutrition and Promote National Development; Robertson, G.L., Lupien, J.R., Eds.; International Union of Food Science and Technology: Guelph, ON, Canada, 2008.