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Dissertation

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Dissertation Finnvid Prescher Title: Seed orchards genetic considerations on function, management and seed procurement. Start: summer 2004 – PowerPoint PPT presentation

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Title: Dissertation


1
Dissertation Finnvid Prescher
  • Title Seed orchards genetic considerations on
    function, management and seed procurement.
  • Start summer 2004
  • Planned disputation Friday 070928
  • Planned focus on P sylvestris in seed orchards,
    genetics and seeds
  • (less focus on spruce and pollen)
  • Last edit January 2007
  • Remark as the dissertation took place as planned
    and successful 070928, this presentation is only
    of historic interest, but is sill kept here for
    documentationary reasons. All manuscripts planned
    here are now accepted or printed, thus the plans
    here were successfully completed.

2
Past history
  • Finnvid was doctorand for Anders Persson, spruce
    and pine provenances, in Garpenberg some decades
    ago. Dag L was pherically involved. That resulted
    in some papers, which could be part of a thesis,
    but the current thesis starts from scratch.

3
Study (lead author) State Result
Linear deployment thinning (Prescher,) Good manuscript Algorithm for genetic thinning. Can combine raise in gain and diversity!
Optimal clone number in seed orchard (LindgrenPrescher 2005) Published. Silvae Genetica 16 -25 clones suggested for future Swedish seed orchards, lower for American P taeda.
Only outcrossing considered for clonal reproductive output (Prescher,2006) Published TGG Linear deployment almost optimal even if only outcrossing considered, but relation gain and eff numb changes
4
Study (lead author) State Result
Seed set in seed orchards (Prescher,Kroon 2005) Published Komi proceedings Few cones in large pine grafts visible rough measures good enough for CV high seed production in old seed orchards etc.
Economic optimization of seed orchard establishment (El-Kassaby, Prescher2007) SJFR in press Shorter life time for Scots pine seed orchards than planned today is advantageous (30 years instead of 40). Start harvest early in spite of contamination favourable. Recommend 400-600 grafts/ha harvested 8-30 years.
5
Study State Result
Model for benefit of establishing a new seed orchard with Norway spruce as model (Morigushi, Prescher?) Manuscript Optimal seed orchard productive life longer for Norway spruce than Scots pine. Can be shorter if value of gain high
Reproductive and morphologic characters in Turkish Scots pine seed orchards (Bilir, Prescher2007) Published Euphytica Within clone variation important, broad sense heritability not very high, variation among clones limited, not high correlation among characters, diameter reasonable correlation with flowering
Seed set variation in Turkish Scots pine seed orchards (Bilir, PrescherKroon) Manuscript Almost as much filled seeds in the bottom of the crown as in the top, in contrast to earlier Swedish studies. Half of the seed production is in the middle third of the crown, one quarter in the top and one quarter in the bottom.
6
Study State Result
Variation in seed set among clones (Prescher, . 2007) Submitted Smaller variation among clones in seed set than earlier assume (Kang et al 2003). Sibling coefficient around ?1.3
Clonetime interaction for seed set (Kroon, Prescher2007) Manuscript. Some, but not high, correlation between seed set of clones in the same seed orchard at early and late age
Correlation between cone set at different places Yordan, Lindgren, Prescher Will be published in Turkey proceeding as long abstract (3p). Low and variable correlation make it doubtful to select for seed set
7
In presentable form (Jan07, available through
library services or on the net or via Dag
Lindgren) Published Lindgren D and Prescher F
2005. Optimal clone number for seed orchards with
tested clones. Silvae Genetica 80-92. Prescher
F, Lindgren D and El-Kassaby Y 2006. "Is linear
deployment of clones optimal under different
clonal outcrossing contributions in seed
orchards?" Tree Genetics and Genomes
225-29. Prescher F, Lindgren D, Wennström U,
Almqvist C, Ruotsalainen S, Kroon J 2005. Seed
production in Scots pine seed orchards. In
Fedorkov A (editor) Status, monitoring and
targets for breeding programs. Proceedings of the
meeting of Nordic forest tree breeders and forest
geneticists, Syktyvkar 2005. Bilir N, Prescher F,
Ayan D and Lindgren D 2006. Variations among
grafts and clones in size and strobili production
in seed orchards of Pinus sylvestris. Euphytica
152293-301. El-Kassaby YA, Prescher F Lindgren
D 2007. Advanced Generation Seed Orchards as
affected by Breeding Advance, Timing of Seed
Crop, and Cost Components with Special Reference
to Scots Pine in Sweden. Scandinavian Journal of
Forest Research. In press. Submitted Prescher F,
Lindgren D, Almqvist C, Kroon J, Lestander T
Mullin T Variation in female fertility in
mature Pinus sylvestris clonal seed orchards.
Submitted manuscript Lindgren D, Tellalov Y
Prescher F 2007. Seed set for Scots pine grafts
is difficult to predict In Proceedings of the
IUFRO Division 2 Joint Conference Low Input
Breeding and Conservation of Forest Genetic
Resources Antalya, Turkey, 9-13 October 2006.
Edited by Fikret Isik. p 139-141. Manuscripts Pres
cher F, Lindgren D and Karlsson B. Genetic
Thinning of Clonal Seed Orchards using Linear
deployment may improve both gain and diversity.
Manuscript Moriguchi Y, Prescher F, and Lindgren
D 2007. Prediction of optimum orchard rotation
age in Norway spruce seed orchards based on costs
and genetic gain. Manuscript Bilir N, Prescher F,
Lindgren D and Kroon J 2007.Variation in seed
related characters in clonal seed orchards of
Pinus sylvestris . Manuscript Kroon J, Prescher
F, Wennström U and Lindgren D 2007. Cone set over
time and clones in a seed orchard. Manuscript
8
Formal
  • Opponent Tom Byram
  • Ex comm Matti Haapanen, Erik Kjaer, Erik Ståhl,
    reserv Tore Ericsson
  • The thesis itself, writing was started in January
    2007 and a preliminary version is scheduled till
    June.

9
Formal
  • Initial plan 040812
  • 1st revision 05-11-05 signed by Dag Finnvid and
    Ola
  • There are 39 course points in Ladoc. 40 are
    required and are planned to be processed as late
    as possible to cover all remaining.
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