Est-il possible de tirer des enseignements des introductions anciennes d’agents pathogènes ? L’exemple de la graphiose de l’orme

In order to explore the role of agricultural genetic breeding technology in elm cultivation, this paper improves the big data technology. According to the test data verification requirements, based on the Monte Carlo idea, a TDSTI statistical test method is proposed, and a set of judgment criteria for the significance of spatio-temporal autocorrelation is given. Moreover, in order to make the observed variables of the time lag series have a clearer geographical significance, the obtained spatio-temporal weight matrix is subjected to row standardization. In addition, this paper combines big data technology and agricultural genetic breeding technology to study the cultivation of elm trees. Finally, this paper conducts a correlation analysis between the distance matrix generated by cluster analysis of leaf shape traits and the distance matrix generated by cluster analysis of SSR molecular markers. The research results show that agricultural genetic breeding technology can play an important role in the cultivation of elm.

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The Practical Application of Agricultural Genetic Breeding Technology in Elm Cultivation Based on Big Data Analysis

Huang

Yang

Liang

et al. 2022

Mobile Information Systems

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The Populations and Habitat Preferences of Three Elm Species in Conditions Prevailing on Plains of Poland

Napierała-Filipiak

Filipiak

Jaworek-Jakubska

2021

Forests

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From among the 35–40 elm species existing around the world, three are native to Europe: the wych elm (Ulmus glabra Huds.), the European white elm, (Ulmus laevis Pall.), and the field elm (Ulmus minor Mill.). The populations of these trees have been greatly reduced as a result of a decrease in the total area of riparian forests. Furthermore, for nearly 100 years, they have been destroyed by Dutch elm disease (DED). The main research problems of this study are: what are the habitat preferences of elms growing in a given area; and whether the occurrence of DED depends on the species of elm and the habitat in which it occurs. The results presented here are based on field studies and observations have been supplemented with data from forest inventories. All of the examined elms are definitely more abundant in habitats that are fertile or very fertile and moist, with a neutral or slightly alkaline soil pH. The preference for moist sites is the most evident in the case of U. laevis and the least evident in the case of U. glabra. A slight shift in habitat preferences of the field elm, compared to the white elm, towards less humid conditions was observed. The predominant species of elm in the studied area is currently U. laevis, which was rarely cultivated in forests in the past. In the examined area, the field elm population is clearly on the decline mainly due to the long-term presence of Dutch elm disease. U. glabra is the rarest species in the examined area and most often found on slopes. The current proportions of individual species should be maintained. This paper discusses factors, including ones not connected with DED, that may be responsible for the current state of populations of particular species of elm in forests of Central Europe.

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Conservation and use of elm genetic resources in France: results and perspectives

Collin¹,

Rondouin²,

Joyeau³

et al. 2020

iForest

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Launched in 1987, the French National Programme for the Conservation of Native Elm Genetic Resources focused on the ex situ conservation of clones of adult field elms (Ulmus minor Mill.) survivors of the Dutch elm disease (DED) pandemic. It was later expanded to include the in situ dynamic conservation of populations of European white elm (U. laevis Pall.) and wych elm (U. glabra Huds.). The national collection contains 441 clones, partly characterized and evaluated in a European project. The pathological tests and experimental plantations did not reveal clones truly resistant to DED but provided material for the restoration of hedgerows. Two conservation units of white elm and one of wych elm were selected, enriching the pan-European EUFORGEN network for dynamic conservation of forest genetic resources. This programme provides feedback on genetic conservation strategies for forest trees in a health crisis. New partners are invited to make use of the scientific potential of the clone bank and experimental plots.

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Est-il possible de tirer des enseignements des introductions anciennes d’agents pathogènes ? L’exemple de la graphiose de l’orme

Cited by 3 publications

References 23 publications

The Practical Application of Agricultural Genetic Breeding Technology in Elm Cultivation Based on Big Data Analysis

The Practical Application of Agricultural Genetic Breeding Technology in Elm Cultivation Based on Big Data Analysis

The Populations and Habitat Preferences of Three Elm Species in Conditions Prevailing on Plains of Poland

Conservation and use of elm genetic resources in France: results and perspectives

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