Étude de la variabilité agromorphologique de la collection nationale de mils locaux du Sénégal

Sy, Ousmane; Fofana, A; Cissé, Ndiaga; Noba, Kandioura; Diouf, D; N'Doye, Issa Diop; Sané, Djibril; Kane, Allen E.; Kane, N. A.; Hash, Tom; Haussman, B; Elwegan, E

doi:10.4314/jab.v87i1.1

Cited by 15 publications

(17 citation statements)

References 4 publications

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“…Pearl millet shows a high genetic diversity that can be explained by its strong outcrossing rate (75%) and the still on-going gene flow with its wild relative (Mariac et al, 2006a; Lewis, 2010). This high genetic diversity is in line with its high phenotyping diversity observed in Senegal (Sy et al, 2015) as in Western Africa (Pucher et al, 2015). Together, these findings highlight the untapped potential of Senegalese pearl millet germplasm for breeding.…”

Section: Discussionsupporting

confidence: 68%

“…Collects were done in 1992 and 1994 in the main areas of millet production in the Groundnut Basin as previously described (Sy et al, 2015). Geographical coordinates of these accessions were partially retrieved (88%) by using village names.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, phenotyping (Sy et al, 2015) and genotyping by sequencing (Hu et al, 2015) studies were carried out on a set of Senegalese pearl millet landraces. Sampling was restricted to only one agro-ecological area of Senegal, the Groundnut Basin, and included only nine so-called intermediate-flowering landraces (flower between 75 to 100 days after sowing).…”

Section: Introductionmentioning

confidence: 99%

“…Sampling was restricted to only one agro-ecological area of Senegal, the Groundnut Basin, and included only nine so-called intermediate-flowering landraces (flower between 75 to 100 days after sowing). Based on phenology, head architecture and grain color, these accessions were classified into three cultivar groups, indicating a morphological diversity between early flowering landraces (Sy et al, 2015). Using 83,875 single nucleotide polymorphisms (SNPs) on the same set of accessions in addition to 252 global accessions, a higher genetic diversity was observed in Senegal accessions compared to millet accessions in India, South and Western Africa (Hu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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New Genetic Insights into Pearl Millet Diversity As Revealed by Characterization of Early- and Late-Flowering Landraces from Senegal

et al. 2017

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Pearl millet (Pennisetum glaucum (L.) R. Br.) is a staple food and a drought-tolerant cereal well adapted to Sub-Saharan Africa agro-ecosystems. An important diversity of pearl millet landraces has been widely conserved by farmers and therefore could help copping with climate changes and contribute to future food security. Hence, characterizing its genetic diversity and population structure can contribute to better assist breeding programs for a sustainable agricultural productivity enhancement. Toward this goal, a comprehensive panel of 404 accessions were used that correspond to 12 improved varieties, 306 early flowering and 86 late-flowering cultivated landraces from Senegal. Twelve highly polymorphic SSR markers were used to study diversity and population structure. Two genes, PgMADS11 and PgPHYC, were genotyped to assess their association to flowering phenotypic difference in landraces. Results indicate a large diversity and untapped potential of Senegalese pearl millet germplasm as well as a genetic differentiation between early- and late-flowering landraces. Further, a fine-scale genetic difference of PgPHYC and PgMADS11 (SNP and indel, respectively) and co-variation of their alleles with flowering time were found among landraces. These findings highlight new genetic insights of pearl millet useful to define heterotic populations for breeding, genomic association panel, or crosses for trait-specific mapping.

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Section: Discussionsupporting

confidence: 68%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New Genetic Insights into Pearl Millet Diversity As Revealed by Characterization of Early- and Late-Flowering Landraces from Senegal

et al. 2017

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“…In Senegal, two major varieties of pearl millet are cultivated: Souna morphotypes that ower early, from 50 to 60 days after planting, and Sanio morphotypes which ower late, from 80 to 110 days after planting (9,10). Between 1992 and 2014, a nationwide collection of landraces was collected, capturing the Senegalese cultivated pearl millet varieties.…”

Section: Introductionmentioning

confidence: 99%

GWAS unveils features between early- and late-flowering pearl millets

Diack

Kanfany

Guèye

et al. 2020

Preprint

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Background: Pearl millet, a dietary food for around 100 million people in Africa and in India, has a large diversity due to an extensive genetic diversity combined with a high degree of admixture with wild relatives. In Senegal, two major morphotypes are distinguished: early-flowering and late-flowering millets. The phenotypic variabilities according to the flowering time plays an important role in pearl millet adaptation to climate variability. A better understanding of the genetic makeup of these variabilities would allow breeding of pearl millet fitting different climatic areas. In this study, we aimed to characterize the genetic basis of these phenotypic differences. Results: We defined a core collection capturing most of the diversity of cultivated pearl millet of Senegal, which includes 60 early-flowering Souna and 31 late-flowering Sanio. This panel was evaluated during the 2016 and 2017 rainy seasons at Nioro for 16 agro-morphological traits. Phenological and phenotypic traits linked with yield, flowering time, and biomass helped differentiated early- and late-flowering millets. Further, using genotyping-by-sequencing (GBS), 21,663 single nucleotide polymorphisms (SNPs) with minor allele frequencies of more than 5% were identified. Sparse Non-Negative Matrix Factorization (sNMF) analysis confirms the genetic structure in two gene pools associated with flowering time differences. Moreover, two chromosomal regions on linkage groups (LG 3) (~89.7Mb) and (LG 6) (~68.1Mb) differentiated the early-flowering into two clusters. Genome-wide association study (GWAS) was used to associate phenotypic variation to the SNPs and 18 genes were linked to flowering time, plant height, nodal tiller number, and biomass (P-value ˂ 2.3E-06). Conclusions: The diversity of early- and late-flowering pearl millet landraces of Senegal was captured using a heuristic approach. Key phenology and phenotypic traits, SNPs, and candidate genes underlying flowering time, tillering, biomass and plant height of pearl millet were identified. Chromosome rearrangements in LG3 and LG6 were implicated as a source of variation in early-flowering morphotypes. Using candidate genes underlying these features between pearl millet morphotypes would have paramount importance in breeding strategies under climate change scenarios.

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Assessment of Agro-morphological Performances of 56 Accessions of Pennisetum glaucum with Grain and Fodder Potentials in Niger

Moussa

Kindomihou

Houéhanou

et al. 2020

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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Étude de la variabilité agromorphologique de la collection nationale de mils locaux du Sénégal

Cited by 15 publications

References 4 publications

New Genetic Insights into Pearl Millet Diversity As Revealed by Characterization of Early- and Late-Flowering Landraces from Senegal

New Genetic Insights into Pearl Millet Diversity As Revealed by Characterization of Early- and Late-Flowering Landraces from Senegal

GWAS unveils features between early- and late-flowering pearl millets

Assessment of Agro-morphological Performances of 56 Accessions of Pennisetum glaucum with Grain and Fodder Potentials in Niger

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