Training workshop on “Concepts and tools for optimum selection in forest tree breeding” – B4EST
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Training workshop on “Concepts and tools for optimum selection in forest tree breeding”

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28-30 October 2019, HÖÖR, Sweden
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Organised by the GENTREE project.
Participants: forest managers and practitioners, forest breeders
Deadline for application: 15 June 2019

Tree breeders must often consider conservation of genetic diversity, while at the same time they attempt to maximize genetic response to selection. This challenge is common to management of populations for both gene conservation and elite breeding, as well as to assembly of deployment populations, such as seed orchards and mixtures of selected clones. GenTree has developed several tools and advanced methods for addressing this challenge.

The purpose of this course is to provide participants with the background and user-skills necessary to apply these tools correctly in the context of applied forest tree breeding programs. Different tools for “optimum selection” will be presented, such as “OPSEL”, which uses state-of-the-art mathematical approaches to optimize selection with a specified constraint on gene diversity. Other approaches include managing genetic diversity at the genomic level to guarantee short- and long-term genetic gains or levels of fitness, notably under genomic-evaluation scenarios.

After “optimizing” genetic contributions to a selected population, the practitioner still faces the daunting task of preparing mating plans that respect these contributions, while avoiding excessive relatedness between parents. A generalized tool “XDesign” makes this task straightforward, allowing the user to specify a threshold on the maximum acceptable coancestry between mates.

The training will show the concepts and functioning of several strategies to account explicitly for diversity across the genome of candidates during selection and mating steps in the context of breeding and conservation programs. Breeding strategy evaluation will be addressed with R-scripts and the simulation package “POPSIM’.

More information: Johan Westin (Skogforsk, johan.westin@skogforsk.se)

Photo: Stocksnap/Pixabay
 

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