Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.02.008 |
Selective breeding of lodgepole pine increases growth and maintains climatic adaptation | |
MacLachlan, Ian R.1; Wang, Tongli1; Hamann, Andreas2; Smets, Pia1; Aitken, Sally N.1 | |
2017-05-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 391 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Climate change is disrupting historical patterns of adaptation in temperate and boreal tree species, causing local populations to become maladapted. Tree improvement programs typically utilise local base populations and manage adaptation using geographically defined breeding zones. As climates shift, breeding zones are no longer optimal seed deployment zones because base populations are becoming dissociated from their historical climatic optima. In response, climate-based seed transfer (CBST) policies incorporating assisted gene flow (AGF) are being adopted to pre-emptively match reforestation seedlots with future climates, but their implementation requires accurate knowledge of genetic variation in climatically adaptive traits. Here we use lodgepole pine as a case study to evaluate the effects of selective conifer breeding on adaptive traits and their climatic associations to inform CBST and AGF prescriptions. Our approach compared 105 natural stand and 20 selectively bred lodgepole pine seedlots from Alberta and British Columbia grown in a common garden of 2200 seedlings. The effects of selection on phenotypic variation and climatic associations among breeding zones were assessed for growth, phenology and cold hardiness. We found substantial differences between natural and selected seedlings in growth traits, but timing of growth initiation was unaffected, growth cessation was delayed slightly (average 4 days, range 0.7 days to 10 days), and cold injury was slightly greater (average 2.5%, range -7% to 11%) in selected seedlings. Phenotypic differentiation among breeding zones and climatic dines were stronger for all traits in selected seedlings. Height gains resulted from both increased growth rate and delayed growth cessation, but negative indirect effects of selection on cold hardiness were weak. Selection, breeding and progeny testing combined have produced taller lodgepole pine seedlings that are not adaptively compromised relative to their natural seedling counterparts. Selective breeding produces genotypes that achieve increased height growth and maintain climate adaptation, rather than reconstituting genotypes similar to populations adapted to warmer climates. While CBST is needed to optimise seedlot deployment in new climates, an absence of systematic indirect selection effects on adaptive traits suggests natural and selected seedlots do not require separate AGF prescriptions. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Climate adaptation Correlated response to selection Phenology Cold hardiness Assisted gene flow Pinus contorta |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399511500040 |
WOS关键词 | TREE POPULATIONS ; FROST HARDINESS ; DOUGLAS-FIR ; LOCAL ADAPTATION ; SHOOT ELONGATION ; ROCKY-MOUNTAINS ; FOREST HEALTH ; SEED TRANSFER ; GENE FLOW ; CONTORTA |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23031 |
专题 | 气候变化 |
作者单位 | 1.Univ British Columbia, Dept Forest & Conservat Sci, 3041-2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; 2.Univ Alberta, Dept Renewable Resources, 733 Gen Serv Bldg, Edmonton, AB T6G 2H1, Canada |
推荐引用方式 GB/T 7714 | MacLachlan, Ian R.,Wang, Tongli,Hamann, Andreas,et al. Selective breeding of lodgepole pine increases growth and maintains climatic adaptation[J]. FOREST ECOLOGY AND MANAGEMENT,2017,391. |
APA | MacLachlan, Ian R.,Wang, Tongli,Hamann, Andreas,Smets, Pia,&Aitken, Sally N..(2017).Selective breeding of lodgepole pine increases growth and maintains climatic adaptation.FOREST ECOLOGY AND MANAGEMENT,391. |
MLA | MacLachlan, Ian R.,et al."Selective breeding of lodgepole pine increases growth and maintains climatic adaptation".FOREST ECOLOGY AND MANAGEMENT 391(2017). |
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