# A new source of diversity for sorghum improvement?

Oberline Fokou Yemata, Abdoul-Aziz Saidou, Pierre Mournet, Stéphanie Sidibe-Bocs, Venasius Lendzemo, André Djonnewa, David Pot, Daniel Foncéka, Gabriel Kanmegne, Hélène Joly

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## To cite this version:

Oberline Fokou Yemata, Abdoul-Aziz Saidou, Pierre Mournet, Stéphanie Sidibe-Bocs, Venasius Lendzemo, et al.. A new source of diversity for sorghum improvement?. Sorghum in the 21st Century, Global Sorghum Conference, CIRAD; Kansas State University; Collaborative Research on Sorghum and Millet; SorghumID; IRD; CERAAS, Jun 2023, Montpellier, France. pp.262. hal-05181927

HAL Id: hal-05181927

https://hal.science/hal-05181927v1

Submitted on 23 Jul 2025

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# Sorghum in the 21st Century
## Global Sorghum Conference

Resiliency and Sustainability in the Face of Climate Change

June 5-9 2023 The Corum Event Center, Montpellier, France

Lead Sponsor

KANSAS STATE
UNIVERSITY.

College of Agriculture

Supporting the

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INTERNATIONAL YEAR OF
MILLETS
2023

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## BOOK OF ABSTRACTS

PROGRAM - ABSTRACTS

List of posters - List of participants

List of exhibitors - Exhibition plan

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cirad

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Sorghum

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CERAMS
Cercle d'étude régional
de rédaction à la sauveté
A new source of diversity for sorghum improvement?

Oberline Fokou Yemata<fnref n="1" /> (oberlinej@yahoo.fr), Abdoul-Aziz Saïdou², ³, Pierre Mournet³, Stephanie SIDIBE-BOCS³, Venasius Lendzemo⁴, Bassirou Sine⁵, André Djonnewa⁴, David Pot³, Daniel Fonceka³, ⁵, Gabriel Kanmegne⁶, Hélène Joly³

Sorghum is considered like a rainfed crop but it is also grown in the dry season: direct sowing in northern Senegal and transplanted after approximately 45 days of growth in the nursery in the Lake Chad Basin. The genetic diversity of these varieties of sorghum is not well known, the objective of this study is therefore to evaluate this diversity of rainfed sorghum and dry season sorghum collected in Senegal and in the Lake Chad Basin and to understand its organization.

The plant material studied includes 153 accessions covering 4 eco-seasonal types of sorghum defined on the basis of seasonality (rainy season, dry season) and eco-geographical zone (Senegal and Lake Chad Basin). High-throughput sequencing data (GBS) made it possible, on the basis of approximately 120,000 SNPs covering the sorghum genome, to describe the genetic diversity of the collection studied in relation to the 4 eco-seasonal types. The genetic diversity of each population was estimated by evaluating its number of total alleles, its number of private alleles and its allelic richness. Principal component analysis was carried out to study the organization of the genetic diversity of the global population.

The genomic analysis showed that the diversity of the 153 sorghum accessions is structured into 3 genetic groups. This organization of the diversity reflects the influence of seasonality and geographical origin of sorghum accessions. Two-thirds of dry season sorghum accessions in the Lake Chad Basin form a well-differentiated group from rainfed sorghum accessions. These experimental results provide new directions for integrating dry season sorghum diversity into sorghum improvement programs.

References:

1. Chantereau J et al., Le sorgho, 2013, Editions Quae, 264p.

2. Saïdou A-A et al., Histoire d'une innovation agricole récente à l'échelle régionale: quelle différenciation des sorghos repiqués dans le bassin du lac Tchad?, Les Cahiers d'Outre-Mer, 141-168p.

<footnote n="1">¹ none, Yaoundé, Cameroon ; ² Imaan Research, Niamey, Niger ; ³ AGAP Institut, Cirad, Montpellier, France ; ⁴ IRAD, Yaoundé, Cameroon ; ⁵ CERAAS, Thiès, Senegal ; ⁶ Département de Biologie Végétale, Université de Dschang, Dschang, Cameroon</footnote>