Person: Costich, D.E.
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Costich
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D.E.
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Costich, D.E.
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0000-0002-5894-611X 32 results
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- State of ex situ conservation of landrace groups of 25 major crops(Nature Publishing Group, 2022) Ramirez-Villegas, J.; Khoury, C.K.; Achicanoy, H.; Diaz, M.V.; Mendez, A.C.; Sosa, C.C.; Kehel, Z.; Guarino, L.; Abberton, M.; Aunario, J.; Awar, B.A.; Alarcon, J.C.; Amri, A.; Anglin, N.L.; Azevedo, V.; Aziz, K.; Capilit, G.L.; Chavez, O.; Chebotarov, D.; Costich, D.E.; Debouck, D.; Ellis, D.; Falalou, H.; Fiu, A.; Ghanem, M.E.; Giovannini, P.; Goungoulou, A.J.; Gueye, B.; Hobyb, A.I.E.; Jamnadass, R.; Jones, C.S.; Kpeki, B.; Lee, J.S.; McNally, K.; Muchugi, A.; Ndjiondjop, M.N.; Oyatomi, O.; Payne, T.S.; Ramachandran, S.; Rossel, G.; Roux, N.; Ruas, M.; Sansaloni, C.; Sardos, J.; Setiyono, T.; Tchamba, M.; van den Houwe, I.; Velazquez, J.A.; Venuprasad, R.; Wenzl, P.; Yazbek, M.; Zavala Espinosa, C.
Publication - A B73×Palomero Toluqueño mapping population reveals local adaptation in Mexican highland maize(Genetics Society of America, 2022) Perez-Limón, S.; Meng Li; Cintora-Martinez, G.C.; Aguilar-Rangel, M.R.; Salazar-Vidal, M.N.; González-Segovia, E.; Blöcher-Juárez, K.; Guerrero-Zavala, A.; Barrales-Gamez, B.; Carcaño-Macias, J.; Costich, D.E.; Nieto-Sotelo, J.; Martinez, O.; Simpson, J.; Hufford, M.B.; Ross-Ibarra, J.; Flint-Garcia, S.; Diaz-Garcia, L.; Rellán-Álvarez, R.; Sawers, R.
Publication - Crop genetic erosion: understanding and responding to loss of crop diversity(Wiley, 2021) Khoury, C.K.; Brush, S.B.; Costich, D.E.; Curry, H.A.; De Haan, S.; Engels, J.M.M.; Guarino, L.; Hoban, S.; Mercer, K.L.; Miller, A.J.; Nabhan, G.P.; Perales, H.R.; Richards, C.; Riggins, C.; Thormann, I.
Publication - Genetic diversity and selection signatures in maize landraces compared across 50 years of in situ and ex situ conservation(Springer Nature, 2021) McLean R., F.D.; Costich, D.E.; Camacho Villa, T.C.; Pè, M.E.; Dell'acqua, M.
Publication - Genome-wide analyses reveal footprints of divergent selection and popping-related traits in CIMMYT’s maize inbred lines(Oxford University Press, 2021) Jing Li; Delin Li; Zavala Espinosa, C.; Trejo Pastor, V.; Rasheed, A.; Palacios-Rojas, N.; Jiankang Wang; Santacruz-Varela, A.; De Almeida Silva, N.C.; Schnable, P.S.; Costich, D.E.; Huihui Li
Publication - Enhancing seed conservation in rural communities of Guatemala by implementing the dry chain concept(Springer, 2020) Guzzon, F.; Bello, P.; Bradford, K.J.; Mérida Guzman, M.A.; Costich, D.E.
Publication - Identifying loci with breeding potential across temperate and tropical adaptation via EigenGWAS and EnvGWAS(Wiley, 2019) Jing Li; Gou-Bo Chen; Rasheed, A.; Delin Li; Sonder, K.; Zavala Espinosa, C.; Jiankang Wang; Costich, D.E.; Schnable, P.S.; Hearne, S.; Huihui LiUnderstanding the genomic basis of adaptation in maize is important for gene discovery and the improvement of breeding germplasm, but much remains a mystery in spite of significant population genetics and archaeological research. Identifying the signals underpinning adaptation are challenging as adaptation often coincided with genetic drift, and the base genomic diversity of the species in massive. In this study, tGBS technology was used to genotype 1,143 diverse maize accessions including landraces collected from 20 countries and elite breeding lines of tropical lowland, highland, subtropical/midaltitude and temperate ecological zones. Based on 355,442 high-quality single nucleotide polymorphisms, 13 genomic regions were detected as being under selection using the bottom-up searching strategy, EigenGWAS. Of the 13 selection regions, 10 were first reported, two were associated with environmental parameters via EnvGWAS, and 146 genes were enriched. Combining large-scale genomic and ecological data in this diverse maize panel, our study supports a polygenic adaptation model of maize and offers a framework to enhance our understanding of both the mechanistic basis and the evolutionary consequences of maize domestication and adaptation. The regions identified here are promising candidates for further, targeted exploration to identify beneficial alleles and haplotypes for deployment in maize breeding.
Publication - The abandonment of maize landraces over the last 50 years in Morelos, Mexico: a tracing study using a multi-level perspective(Springer, 2019) McLean R., F.D.; Camacho Villa, T.C.; Almekinders, C.; Pè, M.E.; Dell'acqua, M.; Costich, D.E.Understanding the causes of maize landrace loss in farmers’ field is essential to design effective conservation strategies. These strategies are necessary to ensure that genetic resources are available in the future. Previous studies have shown that this loss is caused by multiple factors. In this longitudinal study, we used a collection of 93 maize landrace accessions from Morelos, Mexico, and stored at the International Maize and Wheat Improvement Center (CIMMYT) Maize Germplasm Bank, to trace back to the original 66 donor families after 50 years and explore the causes for why they abandoned or conserved their seed lots. We used an actor-centered approach, based on interviews and focus group discussions. We adopt a Multi-Level Perspective framework to examine loss as a process, accommodating multiple causes and the interactions among them. We found that the importance of maize landrace cultivation had diminished over the last 50 years in the study area. By 2017, 13 families had conserved a total of 14 seed lots directly descended from the 1967 collection. Focus group participants identified 60 accessions that could still be found in the surrounding municipalities. Our findings showed that multiple interconnected changes in maize cultivation technologies, as well as in maize markets, other crop markets, agricultural and land policies, cultural preferences, urbanization and climate change, have created an unfavorable environment for the conservation of maize landraces. Many of these processes were location- and landrace-specific, and often led to landrace abandonment during the shift from one farmer generation to the next.
Publication - CGIAR Operations under the Plant Treaty Framework(Crop Science Society of America (CSSA), 2019) Lopez Noriega, I.; Halewood, M.; Abberton, M.; Amri, A.; Angarawai, I.I.; Anglin, N.L.; Blummel, M.; Bouman, B.; Campos, H.; Costich, D.E.; Ellis, D.; Gaur, P.; Guarino, L.; Hanson, J.; Kommerell, V.; Kumar, P.L.; Lusty, C.; Ndjiondjop, M.N.; Payne, T.S.; Peters, M.; Popova, E.; Prakash, G.; Sackville Hamilton, N.R.; Tabo, R.; Upadhyaya, H.D.; Yazbek, M.; Wenzl, P.The history of CGIAR and the development and implementation of the International Treaty on Plant Genetic Resources for Food and Agriculture ("Plant Treaty") are closely intertwined. In accordance with the agreements that 11 CGIAR centers signed with the Plant Treaty's Governing Body under Article 15 of the treaty, >730,000 accessions of crop, tree, and forage germplasm conserved in CGIAR genebanks are made available under the terms and conditions of the multilateral system of access and benefit sharing, and the CGIAR centers have transferred almost 4 million samples of plant genetic resources under the system. Many activities of CGIAR centers and their genebanks (e.g., crop enhancement, improved agronomic methods, seed system strengthening, and capacity building) are influenced by, and promote, the Plant Treaty's objectives. The continued existence and optimal functioning of the Plant Treaty's multilateral system of access and benefit sharing is critically important to CGIAR in the pursuit of its mission. However, the multilateral system has encountered some challenges since the Plant Treaty came into force. The successful conclusion of the ongoing process for enhancing the functioning of the multilateral system could increase monetary benefit sharing and incentives for exchanging more germplasm. In the meantime, increased efforts are necessary to promote nonmonetary benefit sharing through partnerships, technology transfer, information exchange, and capacity building. These efforts should be integrated into countries' and organizations' work to implement the Plant Treaty's provisions on conservation and sustainable use of plant genetic resources, and farmers' rights.
Publication - Comparing ex situ and in situ conservation in maize landraces(CIMMYT, [2018]) McLean R., F.D.; Camacho Villa, T.C.; Costich, D.E.; Almekinders, C.; Dell'acqua, M.; Pè, M.E.
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