Dissertation – Finnvid Prescher

Title: Seed orchards – genetic considerations on function, management and seed procurement.

Start: summer 2004Planned disputation: Friday 070928

Planned focus on P sylvestris in seed orchards, genetics and seeds(less focus on spruce and pollen)

Last edit January 2007Remark: 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.

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.

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 (Lindgren&Prescher 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

TGGLinear deployment almost optimal even if only outcrossing considered, but relation gain and eff numb changes

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, Prescher…2007)

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.

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, Prescher…2007)

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, Prescher…Kroon)

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.

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 Ψ=1.3

Clone*time interaction for seed set (Kroon, Prescher…2007)

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

In presentable form (Jan07, available through library services or on the net or via Dag Lindgren):PublishedLindgren 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 2:25-29.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 152:293-301.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. SubmittedPrescher F, Lindgren D, Almqvist C, Kroon J, Lestander T & Mullin T Variation in female fertility in mature Pinus sylvestris clonal seed orchards. Submitted manuscriptLindgren 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.ManuscriptsPrescher F, Lindgren D and Karlsson B. Genetic Thinning of Clonal Seed Orchards using Linear deployment may improve both gain and diversity. ManuscriptMoriguchi Y, Prescher F, and Lindgren D 2007. Prediction of optimum orchard rotation age in Norway spruce seed orchards based on costs and genetic gain. ManuscriptBilir N, Prescher F, Lindgren D and Kroon J 2007.Variation in seed related characters in clonal seed orchards of Pinus sylvestris . ManuscriptKroon J, Prescher F, Wennström U and Lindgren D 2007. Cone set over time and clones in a seed orchard. Manuscript

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.

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.