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Trends in genetic gain for yam in the IITA breeding program

dc.contributor.authorAsfaw, A.
dc.contributor.authorAgre, A.P.
dc.contributor.authorDieng, I.
dc.contributor.authorAdebola, P.O.
dc.contributor.authorObidiegwu, J.
dc.contributor.authorChamba, E.
dc.contributor.authorDarkwa, K.
dc.contributor.authorOtoo, E.
dc.contributor.authorDansi, A.
dc.contributor.authorDibi, K.E.B.
dc.contributor.authorKouakou, A.M.
dc.contributor.authorAsiedu, R.
dc.date.accessioned2024-10-03T15:26:07Z
dc.date.available2024-10-03T15:26:07Z
dc.date.issued2024
dc.identifier.citationAsfaw, A., Agre, A.P., Dieng, I., Adebola, P.O., Obidiegwu, J., Chamba, E., ... & Asiedu, R. (2024). Trends in genetic gain for yam in the IITA breeding program. Crop Science, 1-13.
dc.identifier.issn0011-183X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8574
dc.description.abstractMonitoring genetic gain is crucial to ensure breeding programs' effectiveness and identify potential challenges and areas for their improvement. Our study provides a first overview of the trends in genetic gain for tuber yield and disease resistance traits in the IITA's (International Institute of Tropical Agriculture) yam breeding program. We used historical data (2010–2022) from multiple generations of past breeding cycles evaluated at 31 sites in the white Guinea yam (Dioscorea rotundata Poir) breeding pipeline and 28 sites in the water yam (Dioscorea alata L.) breeding pipeline of IITA and its national partners in West Africa. Our result shows positive genetic trends in fresh tuber yield while recording a gain of 1.38% or 99.17 kg ha−1 per year in the white Guinea yam and 2.18% or 252.41 kg ha−1 per year in the water yam breeding pipelines. Genetic trends for virus and anthracnose resistance were in the desired direction but negligible in white Guinea yam, while significant for virus and nonsignificant for anthracnose resistance in water yam. Our findings indicate that while the breeding program has succeeded in enhancing tuber yield, post-harvest tuber dry matter content and disease resistance (yam mosaic virus and anthracnose) did not follow a similar trend in the material being developed. This implies that the yam breeding program needs to strike a balance between various traits, ensuring that increased yield does not come at a cost to food quality or disease resistance. Our results highlight the importance of continually monitoring and assessing the performance of a breeding program and making informed decisions about which traits to focus on for future improvement.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-13
dc.language.isoen
dc.subjectGenetic Gain
dc.subjectYams
dc.subjectBreeding
dc.subjectVarieties
dc.subjectWest Africa
dc.titleTrends in genetic gain for yam in the IITA breeding program
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationNational Root Crops Research Institute, Nigeria
cg.contributor.affiliationCSIR-Savanna Agricultural Research Institute
cg.contributor.affiliationCSIR-Crops Research Institute, Ghana
cg.contributor.affiliationNational University of Sciences, Benin
cg.contributor.affiliationStation de Recherche sur les Cultures Vivrières, Côte d’Ivoire
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidASFAW:2024
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectGenetic Improvement
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.iitasubjectYam
cg.journalCrop Science
cg.notesOpen Access Article
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1002/csc2.21289
cg.iitaauthor.identifierAsrat Asfaw: 0000-0002-4859-0631
cg.iitaauthor.identifierPaterne AGRE: 0000-0003-1231-2530
cg.iitaauthor.identifierIbnou Dieng: 0000-0002-1051-9143
cg.iitaauthor.identifierPatrick Adebola: 0000-0002-5155-6194
cg.iitaauthor.identifierRobert Asiedu: 0000-0001-8943-2376
cg.futureupdate.requiredNo


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