气候变化领域集成服务门户(CCPortal): Climate and water availability impacts on early growth and growth efficiency of Eucalyptus genotypes: The importance of GxE interactions

CCPortal

DOI	10.1016/j.foreco.2019.117763
	Climate and water availability impacts on early growth and growth efficiency of Eucalyptus genotypes: The importance of GxE interactions
	Rubilar R.; Hubbard R.; Emhart V.; Mardones O.; Quiroga J.J.; Medina A.; Valenzuela H.; Espinoza J.; Burgos Y.; Bozo D.
发表日期	2020
ISSN	0378-1127
卷号	458
英文摘要	Predicting Eucalyptus plantation productivity in the face of climate change is a key challenge for intensively managed forest plantations around the world. Forest industry tree improvement and advanced silvicultural programs are charged with maximizing forest production but face challenging selection choices where Eucalyptus genotypes may be sensitive to genetic × environment interactions (GxE). Our study investigated the importance of GXE interactions by measuring the early (establishment to 2.6 years old) cumulative growth response of 30 selected genotypes of Eucalyptus globulus, E. nitens, E. badjensis, E. smithii, E. nitens × globulus and E. camaldulensis × globulus hybrid seedlings established across contrasting water availability conditions (High vs Low Irrigation). We compared the same genotypes at a low vapor pressure deficit (VPD) and clayey soil (North site) and a high VPD sandy soil (South site) in order to evaluate the stability of these genotypes across environmental gradients and thus evaluate the importance of genetic versus environmental impacts on growth. Stand growth was evaluated at 2.6 years when leaf area index (LAI) reached canopy closure in order to estimate a growth efficiency relationship (GE) with current annual increment (CAI). As expected, irrigation increased cumulative growth and LAI for all taxas, except for E. smithii at the North site. Genotypes showed large significant differences of performance within and across sites under each irrigation treatment. However, a strong relationship between North and South cumulative volume at age 2.6 years was observed for irrigated genotypes but not for non-irrigated genotypes. This suggests that a large GxE interaction may be expected under low water resource availability conditions associated with strong effects in ranking change of evaluated taxas and genotypes. Comparing taxas with at least two genotypes or more in our experiment, GE increased under High Irrigation for all taxas across sites. However, E. nitens × globulus hybrids showed small differences between High vs Low Irrigation treatments GE relationships compared to E. nitens and E. globulus genotypes. Our results suggest the need for strategic allocation of genotypes to contrasting drought risk environments and the need to assess our understanding of how particular genotypes interact with water stress conditions. © 2019 Elsevier B.V.
关键词	Drought Efficiency Environmental impact Forestry Irrigation Plants (botany)Risk assessment Water resources Current annual increments Drought stress Environmental gradient Eucalyptus plantations Genotype Intensively managed forest plantations Water stress Wood growth Climate change climate change drought stress efficiency measurement environmental gradient forest management genotype genotype-environment interaction growth plantation forestry silviculture water availability water stress Drought Efficiency Forestry Irrigation Risk Assessment Water Resources Eucalyptus Eucalyptus camaldulensis Eucalyptus globulus Eucalyptus nitens Eucalyptus smithii
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133084
推荐引用方式 GB/T 7714	Rubilar R.,Hubbard R.,Emhart V.,et al. Climate and water availability impacts on early growth and growth efficiency of Eucalyptus genotypes: The importance of GxE interactions[J]. Forest Ecology and Management,2020,458.
APA	Rubilar R..,Hubbard R..,Emhart V..,Mardones O..,Quiroga J.J..,...&Bozo D..(2020).Climate and water availability impacts on early growth and growth efficiency of Eucalyptus genotypes: The importance of GxE interactions.,458.
MLA	Rubilar R.,et al."Climate and water availability impacts on early growth and growth efficiency of Eucalyptus genotypes: The importance of GxE interactions".458(2020).