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Sainte-Foy-lès-Lyon, France

Grotte M.,French National Institute for Agricultural Research | Pietri E.,French National Institute for Agricultural Research | Pitiot C.,CEP INNOVATION Sarl | Audergon J.M.,French National Institute for Agricultural Research
Acta Horticulturae | Year: 2010

Apricot graft-compatibility is a major concern for most of the new released cultivars because they are often selected and rapidly evaluated on rather young trees, and then released without any graft-compatibility evaluation. Thus, fruit growers are directly facing breakages induced by graft-incompatibility between cultivars and rootstocks in orchard without any preventive indicator. In localized graft-incompatibility the focus is on the lack of continuity between the tissues of the rootstock and the cultivar. In order to estimate the level of fragility of the graft-union a mechanical tester has been developed. The principle is based on the evaluation of the force to be applied to break the graft union. The data collected are based on the force, the pressure, the moment, the work and the diameter of the graftcombinations, all along the traction phase from the beginning to the breakage point. The tester has been evaluated with 40 combinations of around 10 replications each in order to appreciate the internal and external variations. The preliminary results allow the separation of the graft combinations on the base of their elasticity, pressure and the surface of the junction between stock and scion. Source


Audergon J.M.,French National Institute for Agricultural Research | Blanc A.,French National Institute for Agricultural Research | Clauzel G.,Unite Experimentale de Recherche Integree en Arboriculture Fruitiere de Gotheron | Pitiot C.,CEP INNOVATION Sarl | And 8 more authors.
Acta Horticulturae | Year: 2010

Few years ago, apricot fruits characterized by a deep red-purple supra-colour covering nearly the whole surface of the apricot fruit were found in the apricot germplasm. Being introduced in breeding programmes, preliminary selections were obtained and evaluated on their horticultural potential. Their interest for the consumers and their post-harvest main characteristics were investigated. While for the consumers the distinctiveness between these fruits and the conventional apricots was clear, part of the interviewees was attracted by the innovation, while another part was not concerned. However, special attention has to be paid to the harvest because the intense red-colour masks the green ground colour of the skin. In addition, some of the accessions issued from this germplasm are characterized by a rather fast post-harvest evolution. Thus, in order to protect the consumers and to sell the best fruits as possible, it has been proposed to develop all the apricot series under the same trade mark 'Rubisco'® and under a technical agreement proposed to all the growers. So far, three cultivars have been named: 'Ravicille', 'Ravilong' and 'Ravival' with different dates of ripening. Source


Audergon J.M.,French National Institute for Agricultural Research | Blanc A.,French National Institute for Agricultural Research | Gilles F.,French National Institute for Agricultural Research | Clauzel G.,Unite Experimentale de Recherche Integree en Arboriculture Fruitiere de Gotheron | And 11 more authors.
Acta Horticulturae | Year: 2012

The French apricot production is located in the South-Eastern part of the country and focused both in the Rhone valley and close to the Mediterranean Sea. The north of the Rhone valley is characterized by a continental climate while the southern region (Rhone valley and Mediterranean area) is under warm typical Mediterranean climate. Obviously apricot fruit production depends on a specific panel of cultivars in each area of cultivation due to economic and adaptation constraints. In order to enlarge the panel of cultivars to be developed by the growers in each region an integrated breeding program is developed at a national level in France with the participation of INRA, CENTREX and CEP INNOVATION. The main goals of the breeding program are: the elaboration of cultivars suitable for a durable production (including resistance to pests and disease), production regularity (including self-fertility and quality of the flowers), and fruit quality (including taste, attractiveness, and suitability for the transport). The evaluation phase is organized in the 3 main areas of production (Perpignan, Nîmes, Valence) and follows 3 complementary evaluation stages (i) observation of the hybrid on its own roots; (ii) evaluation of the best hybrids after grafting in the 3 main areas; (iii) assessment of the agronomic and commercial interest of the 'elite' accessions in small orchards. The main results issued from this program are presented: 8 registered cultivars, 4 new selections under registration, and the first PPV resistant cultivar 'Aramis' ® 'Shamade'. Source

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