Publications by authors named "Gilles Bezancon"

Ongoing global climate changes imply new challenges for agriculture. Whether plants and crops can adapt to such rapid changes is still a widely debated question. We previously showed adaptation in the form of earlier flowering in pearl millet at the scale of a whole country over three decades.

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Article Synopsis
  • Climate change poses significant risks to food production, especially in sub-Saharan Africa, where costly adaptive strategies may be needed.
  • The study focused on the Sahel region, specifically Niger, where pearl millet is the primary crop, analyzing landrace samples from 1976 and 2003 to understand agro-system responses to drought.
  • Findings revealed that while main varieties remained stable, there was a notable shift towards shorter lifecycles and smaller plant structures, with increased early flowering traits indicating natural selection in response to recurrent drought conditions.
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Identifying the molecular bases of adaptation is a key issue in evolutionary biology. Genome scan is an efficient approach for identifying important molecular variation involved in adaptation. Association mapping also offers an opportunity to gain insight into genotype-phenotype relationships.

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The identification of genes selected during and after plant domestication is an important research topic to enhance knowledge on adaptative evolution. Adaptation to different climates was a key factor in the spread of domesticated crops. We conducted a study to identify genes responsible for these adaptations in pearl millet and developed an association framework to identify genetic variations associated with the phenotype in this species.

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We studied the regional genetic diversity and seed exchange dynamics of pearl millet landraces in south-western Niger. The genetic study was based on AFLP markers. We found significant genetic differentiation between landraces in different geographical areas of south-western Niger.

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Genetic diversity of crop species in sub-Sahelian Africa is still poorly documented. Among such crops, pearl millet is one of the most important staple species. In Niger, pearl millet covers more than 65% of the total cultivated area.

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