Drought resistance and gum yield performances in a Senegalia senegal (L.) Britton progeny trial in Senegal

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dc.contributor.authorSarr, Mame Sokhnaen
dc.contributor.authorSeiler, John R.en
dc.contributor.authorSullivan, Jayen
dc.contributor.authorDiallo, Adja M.en
dc.contributor.authorStrahm, Brian D.en
dc.contributor.departmentForest Resources and Environmental Conservationen
dc.date.accessioned2021-02-10T13:16:05Zen
dc.date.available2021-02-10T13:16:05Zen
dc.date.issued2021-01-18en
dc.description.abstractWith continued global change as a result of land use changes, invasive species and changing climatic patterns, it is becoming increasingly important to understand the adaptability of Senegalia senegal provenances to maximize resilience in managed and natural populations of this species. The objective of this study is to investigate Senegalia senegal genotypic differences in water use efficiency (WUE) measured by stable C-13 isotope composition in foliage according to their ploidy levels. Secondary objectives are to discuss inherent adaptive variation related to soil pH, survival, growth indexes, gum arabic yield and WUE within provenance in the climate change context. A Senegalia senegal progeny trial, in Dahra, Senegal was used in this study: 443 adult trees consisting of 60 families nested within 4 provenances were assessed in this study. Results showed significant differences in gum yield among provenances (P = 0.0002) and families (P < 0.0001). Diamenar and Ngane provenances showed overall similar annual gum yield despite a lower tree survival rate of Ngane than Diamenar. Growth traits, especially stem volume index and crown area index were larger on Ngane provenance, which also displayed significantly higher foliar WUE and lower leaf area index (LAI) than the other provenances. WUE was positively correlated with gum yield (P = 0.0302), but the coefficient of determination was only 2%. Foliar delta C-13 varied significantly (P < 0.0001) between diploids (- 27.91 parts per thousand) and polyploids (- 27.12 parts per thousand). However, within each provenance no significant difference was found. Only 15% of isotope compositions could be explained by ploidy level variation. Differences found in growth and gum yield may be attributed to genotype-specific variation. However, a significant correlation between soil pH and tree survival rate was found (P = 0.0051; r = 0.60). This study confirmed a possible improvement of the gum arabic sector through genotype based selection. Ngane and Diamenar seem to be more profitable to grow in Dahra than the other tested provenances. Future research should investigate the effect of soil pH, other soil physical and chemical properties, and management activities to improve site quality on tree survival and gum yields among provenances. Further, more research is needed to clarify inherent traits underlying drought tolerance in the field and gum yield performance.en
dc.description.notesWe are grateful to Centre National de Recherche Forestiere for the logistical support provided during the fieldwork. We thank Mrs Momar Wade and Ibra Padane for their support in collecting data, Dr Marieme Fall Ba and Dr Mamadou Ousseynou Ly for their help to conduct soil analysis. A big thank to Mr Andy Laviner for his help on using the LAI 2200, and Mr David Mitchem to conduct isotope analysis of leaves. This article is made possible in part by the generous support of the American people through the United States Agency for International Development (USAID) as part of Feed the Future, the U.S. Government's global hunger and food security initiative, under the terms of Contract No. AID-685-A-00-10-00194-00 (USAID/Education and Research in Agriculture). The contents are the responsibility of the author(s) and do not necessarily reflect the views of USAID or the United States Government.en
dc.description.sponsorshipUnited States Agency for International Development (USAID) as part of Feed the FutureUnited States Agency for International Development (USAID); U.S. Government's global hunger and food security initiative [AID-685-A-00-10-00194-00]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1007/s11056-020-09825-yen
dc.identifier.eissn1573-5095en
dc.identifier.issn0169-4286en
dc.identifier.urihttp://hdl.handle.net/10919/102321en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectProvenancesen
dc.subjectGum Arabicen
dc.subjectWUEen
dc.subjectdelta C-13 analysisen
dc.subjectPloidyen
dc.subjectDroughten
dc.titleDrought resistance and gum yield performances in a Senegalia senegal (L.) Britton progeny trial in Senegalen
dc.title.serialNew Forestsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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