High Morphological Differentiation in Crown Architecture Contrasts with Low Population Genetic Structure of German Norway Spruce Stands

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.3390/f9120752

Ключевые слова: Picea abies, microsatellites, crown architecture, morphology, phenotypic adaptation, genetic differentiation

Аннотация: High elevation sites in the low mountain ranges in Germany are naturally covered by Norway spruce (Picea abies (Karst.) L.) stands. Historically, large scale anthropogenic range expansion starting in the mid to late 18th century had a huge impact on the forest composition throughout Germany. Utilisation and exploitation often led to artificial regeneration, mostly carried out using seeds from allochthonous provenances. Usually, autochthonous (natural) high elevation Norway spruce trees have narrow crown phenotypes, whereas lowland trees have broader crowns. Narrow crown phenotypes are likely the result of adaptation to heavy snow loads combined with high wind speeds. In the present study, neighbouring stand pairs of putative autochthonous and allochthonous origin with contrasting phenotypes in high elevation sites were investigated with 200 samples each. These stands are located in the Ore Mountains, the Thuringian Forest, and the Harz Mountains. Additionally, a relict population with the typical narrow high elevation phenotypes was sampled in Thuringia, known as Schlossbergfichte. The objective of the study was to quantify supposedly adaptive phenotypic differences in crown architecture and the genetic differentiation of 11 putatively neutral nuclear microsatellite markers (i.e., simple sequence repeats (nSSRs)). The high differentiation of morphological traits (P-ST = 0.952-0.989) between the neighbouring autochthonous and allochthonous stands of similar age contrasts with the very low neutral genetic differentiation (F-ST = 0.002-0.007; G(ST) = 0.002-0.030), suggesting that directional selection at adaptive gene loci was involved in phenotypic differentiation. Comparing the regions, a small isolation by distance effect for the Harz Mountains was detected, suggesting landscape resistance restricting gene flow. Finally, the differentiation of the very old autochthonous (up to 250 years) stand Schlossbergfichte with typical high elevation phenotypes could cohere with the sampling of a relict genepool.

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Издание

Журнал: FORESTS

Выпуск журнала: Vol. 9, Is. 12

ISSN журнала: 19994907

Место издания: BASEL

Издатель: MDPI

Авторы

  • Care Oliver (Univ Gottingen, Dept Forest Genet & Forest Tree Breeding, Busgen Inst, Fac Forest Sci & Forest Ecol, D-37077 Gottingen, Germany)
  • Mueller Markus (Univ Gottingen, Dept Forest Genet & Forest Tree Breeding, Busgen Inst, Fac Forest Sci & Forest Ecol, D-37077 Gottingen, Germany)
  • Vornam Barbara (Univ Gottingen, Dept Forest Genet & Forest Tree Breeding, Busgen Inst, Fac Forest Sci & Forest Ecol, D-37077 Gottingen, Germany)
  • Hoeltken Aki M. (Northwest German Forest Res Inst NW FVA, Dept Forest Genet Resources, D-34346 Munden, Germany)
  • Kahlert Karina (Serv & Competence Ctr Thuringen Forst, D-99867 Gotha, Germany)
  • Krutovsky Konstantin V. (Univ Gottingen, Dept Forest Genet & Forest Tree Breeding, Busgen Inst, Fac Forest Sci & Forest Ecol, D-37077 Gottingen, Germany; Texas A&M Univ, Dept Ecosyst Sci & Management, College Stn, TX 77840 USA; Russian Acad Sci, Vavilov Inst Gen Genet, Lab Populat Genet, Moscow 119991, Russia; Siberian Fed Univ, Genome Res & Educ Ctr, Krasnoyarsk 660036, RussiaArticle)
  • Gailing Oliver (Univ Gottingen, Dept Forest Genet & Forest Tree Breeding, Busgen Inst, Fac Forest Sci & Forest Ecol, D-37077 Gottingen, Germany)
  • Leinemann Ludger (Univ Gottingen, Dept Forest Genet & Forest Tree Breeding, Busgen Inst, Fac Forest Sci & Forest Ecol, D-37077 Gottingen, Germany)

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