Frederic Georget

Frederic Georget
Cirad - La recherche agronomique pour le développement | CIRAD · Unité Mixte de Recherche Résistance des Plantes aux Bioagresseurs (RPB)

PhD

About

28
Publications
10,776
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600
Citations

Publications

Publications (28)
Conference Paper
Full-text available
New coffee hybrids are important for addressing issues of quality, pests & diseases and climate change, but new plant varieties often encounter slow adoption among farmers due to uncertainties and access. Even when coffee hybrids are shown to be more productive and resistant to (a) biotic stresses, less than 5 % of the orchard in Latin America is p...
Article
Full-text available
Conventional American cultivars of coffee are no longer adapted to global warming. Finding highly productive and stable cultivars in different environments without neglecting quality characteristics has become a priority for breeders. In this study, new Arabica F1 hybrids clones were compared to conventional American varieties in seven contrasting...
Article
Full-text available
Conventional American cultivars of coffee are no longer adapted to global warming. Finding highly productive and stable cultivars in different environments without neglecting quality characteristics has become a priority for breeders. In this study, new Arabica F1 hybrids clones were compared to conventional American varieties in seven contrasting...
Article
Full-text available
In the present paper, we evaluated the implementation of a seed production system based on the exploitation of male sterility on coffee. We studied specifically the combination between CIR-SM01 and Marsellesa ® (a Sarchimor line), which provides a hybrid population called Starmaya. We demonstrated that the establishment of seed garden under natural...
Article
Full-text available
Somatic embryogenesis (SE) is one of the most promising processes for large-scale dissemination of elite varieties. However, for many plant species, optimizing SE protocols still relies on a trial-and-error approach. Using coffee as a model plant, we report here the first global analysis of metabolome and hormone dynamics aiming to unravel mechanis...
Poster
Full-text available
Objectives. The BREEDCAFS project is testing CIRAD-CATIE-ECOM new F1 hybrids* of Coffea arabica-high yielding, resistant to abiotic stresses and adapted to agroforestry-in three coffee producing countries. In collaboration with NOMAFSI and AGI Vietnamese research Institutions, an experimental trial and a network of twelve farmers' plots have been s...
Article
Full-text available
Since the 1990s, somatic embryogenesis (SE) has enabled the propagation of selected varieties, Arabica F1 hybrid and Robusta clones, originating from the two cultivated coffee species, Coffea arabica and Coffea canephora, respectively. This paper shows how mostly empirical research has led to successful industrial transfers launched in the 2000s in...
Conference Paper
Full-text available
Like many other crops, coffee production is threatened by climate changes. Therefore, research on coffee adaptation to abiotic stresses as well as alternative faster breeding programs are priorities in many coffee growing countries. During the last decade, studies have been focused on identifying the physiological, molecular and genetic determinism...
Conference Paper
CIRAD, CATIE, PROMECAFE, CABI, BIOVERSITY Intl, ICRAF e INCAE crearon en 2007 el PCP. El fin del PCP es unir esfuerzos en la búsqueda de recursos para: desarrollar investigaciones y enseñanza (pre y posgrado) sobre agroforestería, incrementar la capacidad de cada institución para desarrollar proyectos agroforestales, y favorecer la comunicación ent...
Article
Full-text available
In general, the current industrial somatic embryogenesis (SE) propagation processes for coffee are costly because they are not productive enough. We show that SE-derived plantlets from C. arabica hybrids were temporarily − between 10 and 25 weeks of development in nursery − able to root with a high success rate (up to 90%) whatever the genotype tes...
Article
Full-text available
The RNAzol RT reagent was used to provide pure RNA from human cells. We develop a protocol using RNAzol RT reagent to extract pure RNA from plants tissues and demonstrate that this RNA extraction method works not only at room temperature but also at elevated temperatures and provides the simplest and most effective single-step method to extract pur...
Article
Full-text available
Long-term cell cultures were used in coffee to study the cytological, genetic and epigenetic changes occurring during cell culture ageing. The objective was to identify the mechanisms associated with somaclonal variation (SV). Three embryogenic cell lines were established in Coffea arabica (2n = 4x = 44) and somatic seedlings were regenerated after...
Article
Full-text available
In Coffea arabica L., the development of direct sowing of somatic embryos (SE) in planting substrate, with subsequent nursery production of plants, has promoted the industrialization of somatic embryogenesis. However, plant conversion rates are still low and require improvements to enhance the cost-effectiveness of commercial micropropagation. With...
Article
Full-text available
Embryogenic suspensions that involve extensive cell division are risky in respect to genome and epigenome instability. Elevated frequencies of somaclonal variation in embryogenic suspension-derived plants were reported in many species, including coffee. This problem could be overcome by using culture conditions that allow moderate cell proliferatio...
Article
Creation and dissemination of Arabica coffee varieties: What varietal innovations? Over 80 % of all Coffea arabica - a species of African origin - is produced in Latin America. The gene pool of C. arabica, which was introduced in Latin America in the 19th century, includes only two relatively similar varieties (Bourbon and Typica). Despite this ver...
Article
Full-text available
Of all the possible micropropagation techniques, vegetative propagation by somatic embryogenesis is by far the most promising one for the rapid, large-scale dissemination of elite individuals. Yet, to date, examples of somatic embryogenesis processes applied at an industrial scale are very few and far between. There are many complications. They usu...
Article
Full-text available
Coffea arabica F1 hybrids derived from crosses between wild Sudan-Ethiopian and American cultivars and propagated by somatic embryogenesis have been obtained in Central America. These new hybrids considerably enhanced the genetic diversity of coffee in the region. We conducted 15 trials to assess whether using hybrids represents substantial genetic...
Article
Plants of Coffea arabica L. derived via somatic embryogenesis, namely, somaclones, were evaluated with C. arabica seedlings grown in the nursery. At the time of their transfer to the nursery, somaclones of C. arabica cvs. Caturra and Costa Rica 95 (Catimor) were smaller and less vigorous than seedlings of the same cultivars. Following an initial sl...
Article
Full-text available
In this work, a morpho-histological study of banana (Musa spp. cv. Grande Naine [AAA]) embryogenic cell suspensions during cryopreservation and regeneration was performed. It was demonstrated that the regeneration process of somatic embryos originating from cryopreserved cell suspensions was different from that of control cell suspensions. Somatic...
Article
Five types of cellular aggregates have been characterised in embryogenic cell suspensions of banana (Musa AAA Grande naine cv.). Type I corresponded to isolated cells or to small cell aggregates. Type II were composed of embryogenic cells. Type III can be distinguished from type II due to the presence of peripheral proliferation zones with embryoni...
Chapter
Mass propagation of plants by tissue culture is labour-intensive and costly. Gelling agents have many drawbacks: they are not an inert medium component and do not enable easy automation. So liquid culture systems, provided that hyperhydricity is eliminated, are considered to be far better: culture conditions are much more uniform, media can be chan...

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Projects

Projects (3)
Project
BREEDCAFS investigates the performance of recently developed hybrids of C. arabica and hybrids grafted on C. canephora in terms of yields, quality and agronomic traits, as well as new platform for knowledge exchange and pathways for seedling dispersal. The project will benefit both smallholder farmers through new varieties for AFS with increased yields and quality and more resistant and resilient to climate change, and the European coffee industry by ensuring long term supply of high quality coffee. The first novelty will be to provide a wide range of genotypes that match the diversity of ecological contexts where farmers are living.