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Method for accurate fiber length determination from increment cores for large-scale population analyses in Norway spruce
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2016 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 70, no 9, 829-838 p.Article in journal (Refereed) Published
Abstract [en]

Fiber (tracheid) length is an important trait targeted for genetic and silvicultural improvement. Such studies require large-scale non-destructive sampling, and accurate length determination. The standard procedure for non-destructive sampling is to collect increment cores, singularize their cells by maceration, measure them with optical analyzer and apply various corrections to suppress influence of non-fiber particles and cut fibers, as fibers are cut by the corer. The recently developed expectation-maximization method (EM) not only addresses the problem of non-fibers and cut fibers, but also corrects for the sampling bias. Here, the performance of the EM method has been evaluated by comparing it with length-weighing and squared length-weighing, both implemented in fiber analyzers, and with microscopy data for intact fibers, corrected for sampling bias, as the reference. This was done for 12-mm increment cores from 16 Norway spruce (Picea abies (L.) Karst) trees on fibers from rings 8-11 (counted from pith), representing juvenile wood of interest in breeding programs. The EM-estimates provided mean-fiber-lengths with bias of only +2.7% and low scatter. Length-weighing and length2-weighing gave biases of-7.3% and +9.3%, respectively, and larger scatter. The suggested EM approach constitutes a more accurate non-destructive method for fiber length (FL) determination, expected to be applicable also to other conifers.

Place, publisher, year, edition, pages
2016. Vol. 70, no 9, 829-838 p.
Keyword [en]
Fibers; Forestry; Maximum principle; Nondestructive examination; Optical fibers; Plants (botany); Weighing, Expectation - maximizations; Fiber length; Increment core; Picea abies; Tracheid length, Wood
National Category
Wood Science
Identifiers
URN: urn:nbn:se:ri:diva-12612DOI: 10.1515/hf-2015-0138Scopus ID: 2-s2.0-84983292171OAI: oai:DiVA.org:ri-12612DiVA: diva2:971046
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Available from: 2016-09-15 Created: 2016-09-15 Last updated: 2016-10-31Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
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  • sv-SE
  • Other locale
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Output format
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