African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Combined agronomic and climatic approaches for sorghum adaptation in Mali

Salifou Sissoko
  • Salifou Sissoko
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Mohamed L. Tekete
  • Mohamed L. Tekete
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Mamoutou Kouressy
  • Mamoutou Kouressy
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Korotimi Thera
  • Korotimi Thera
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Yacouba Dembele
  • Yacouba Dembele
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Mohamed Doumbia
  • Mohamed Doumbia
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Aliou Sissoko
  • Aliou Sissoko
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Sekouba Sanogo
  • Sekouba Sanogo
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Youssouf Diarra
  • Youssouf Diarra
  • Institut de Formation Agro Sylvo- Pastorale IFASP-Bla/Bougouni, Mali.
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Moussa Samake
  • Moussa Samake
  • Université des Sciences des Techniques et des Technologies de Bamako (USTTB)-Faculté des Sciences et Techniques (FST) Badalabougou colline de Badala Bamako Mali.
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Jean François Rami
  • Jean François Rami
  • Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR AGAP, F-34398, Montpellier, France.
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Abdoulaye G. Diallo
  • Abdoulaye G. Diallo
  • Institut d’Economie Rurale (IER), BP: 258, Rue Mohamed V, Bamako, Mali.
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Michel Vaksmann
  • Michel Vaksmann
  • Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR AGAP, BP 1813, Bamako, Mali.
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Oumar Niangado
  • Oumar Niangado
  • Délégation Fondation Syngenta Pour une Agriculture Durable (FDSA), Kalaban Coura ACI Rue 305, BP E 1449 Bamako, Mali.
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Niaba Témé
  • Niaba Témé
  • Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR AGAP, BP 1813, Bamako, Mali.
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  •  Received: 28 May 2018
  •  Accepted: 30 July 2018
  •  Published: 30 August 2018

Abstract

In Sub-Saharan Africa, Genotype-Environment interaction plays a key role in formulating strategies for crop improvement. Multi-location trials have created enabling structure to determine varieties yield performance and stability. Crop modeling led to prediction of long-term and spatial effects of climate variability. Three improved varieties were compared to three landraces. Optimum cultivation areas minimizing the risk of crop failure were delineated by comparing predicted flowering dates and end of rainy seasons. Agronomic values were determined in trials from three climatically different zones in 27 farms. Yield stability was determined using linear regression depending on each environmental mean and the AMMI model. Photoperiod sensitive varieties have wider optimal cultivation areas whereas early-maturing varieties (photoperiod insensitive) are subjected to strong constraints on sowing date. In low productivity conditions, landraces and improved varieties are not distinct. As the environmental cropping conditions increase, improved lines become significantly superior to landraces. Photoperiod insensitive landrace is subservient to climate conditions of its area of origin and its productivity drops sharply when moved to a wetter area. Varieties studied combined productivity and stability traits. These findings are important steps toward breeding climate resilient varieties for meeting the challenges of climate smart agriculture and sustainable intensification.

Key words: Mali, sorghum, GxE, photoperiodism, climate change, yield stability.