Keeping up and enhancing the resistance, genetic diversity, and propagation ability of coniferous against the background of global climate change

Study supported by the Latvian Council of Science

The study brings together studies, started in 2009:

1. Possibilities of preservation and improvement of productivity, resistance, genetic diversity of conifers in the conditions of global climate change (leader I. Baumanis). The study explains the role of genetic factors in increasing the productivity and resistance of coniferous trees to various environmental factors, as well as the impact of climate change on the phenology of processes important for adaptation (growth and flowering of woody plants). The diversity and distribution of Laphodermium fungi, which are the most widespread in Latvia caused by needle diseases, are explained. The two most common species are distinguished, L. seditosum and L. conigenum. A methodology for the detection of the root rot fungus (Heterobasidion annosum) has been developed. The extent and spread of troop infection is explained.
2. The impact of climate change on trends in the development of forest pests (leader A. Šmits). Assessing the development of the oak nun population, a pest new to Latvia, studies were conducted on the spatial distribution of the population, the flight capacity of males, the fertility of females, mortality and other parameters related to population dynamics in accordance with the work tasks. The works are continued according to the work plan.
3. Factors affecting the grafting of conifers and research on graft growth (leader A. Balode, LUA). Vegetative propagation of ornamental conifers with various grafting and seedling growing methods is explained. Recommended optimal grafting terms in greenhouses and field conditions, the most suitable rootstocks for the respective decorative forms. Seedling growth dynamics and optimal nutrient elements are explained.