Long term tree breeding as analyzed by the breeding cycler tool

Dag Lindgren and Darius Danusevicius

Presentations were made at Umeå (February 20) and Ekebo (March 2, 2004). An overall summary here.

The presentations are structured in three powerpoint files

Opening introductory lecture: "Breeding cycler and the road to it"

Long-term-cycling strategy and tactics

The size of the breeding population in long-term breeding, as well as some comments, caveats and limitations.

The presented results were based on studies using the breeding cycler tool, an EXCEL-sheet, which is potentially able to fine-tune many aspects of long-term breeding. We have till early 2004 completed four major studies (+) and some other work using this methodology.

We feel that both the method and some of the results are of interest Tree Breeding in general and Swedish Tree Breeding in Particular. As a result of the seminars and the discussion around it, we have suggested some possible implications  Continued discussion around this document is invited, we will try to discuss the matters raised in the document.

A caveat: The population used was a full sib family and that means that the variance components are smaller than those in the full population, this need to be kept in mind if new entries are inserted in our EXCEL sheets or models.

From Ekebo we keep 3 pictures Darius took here. Slide 1, Slide 2, Slide 3 Darius is a visiting scientist at our Umeå department till April 26.

Clonal testing is fantastic - but presented before!  e.g. at this link. and will therefore not be discussed in detail here.

It is helpful if you understand something from the principles mentioned on theory of gene diversity in forest tree breeding (it is also available as a slideshow) and at a seminar in the beginning of 2003).

Some further reasons for the show:
Sadly, I will not supervise another PhD thesis to the end, but this is a substitute, which looks very much like a thesis, and thus probably keeps me happy for this year. Once upon a time SkogForsk had a "förädlingsråd" for discussions between the University and SkogForsk. That nice idea seems to have ceased to work with the second meeting. This seminar may serve as a substitute 2004. My comments at the two meetings 2000 and in particular the one from 1998 may have relevance and I gave a seminar in Canton 2002 which concerns the need of forest tree breeding.. I suggest it as a nice principle that breeding plans are updated each decade, thus it is time to do that for the "Swedish plan", and this seminar may serve as a trigger. If nothing else, references need some polishing and updating and descriptions can probably be more up to date, and the formal quality of the Swedish plan could be improved.