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Pattern of genotype by environment interaction for radiata pine in southern Australia

Citation

Ivkovic, M and Gapare, W and Yang, H and Dutkowski, G and Buxton, P and Wu, H, Pattern of genotype by environment interaction for radiata pine in southern Australia, Annals of Forest Science, 72, (3) pp. 391-401. ISSN 1286-4560 (2015) [Refereed Article]

Copyright Statement

Copyright INRA and Springer-Verlag France 2014

DOI: doi:10.1007/s13595-014-0437-6

Abstract

Key message: Based on analyses using 20 genetically connected radiata pine trials and on the pattern of trial-trial genetic correlations, current regionalisation of breeding in southern Australia seems justified. However, relationships between environmental variables and genotype by environment interaction are complex.

Context: Current radiata pine breeding and deployment in Australia is based largely on the plantation inventory zones rather than on biological patterns of genotype by environment interaction (G E), and consequently cannot deliver optimal genetic gains across the whole plantation estate. Aim: This study examined patterns of G E to facilitate deployment of genetic stock to particular environments.

Methods: We used 20 genetically well-connected trials across southern Australia to obtain estimates of genetic correlations between performances at different trial sites. Extended factor analyses (XFA) were used to estimate G E variance and produce a matrix of site-site genetic correlations. The patterns among these correlations were examined using a heat map and hierarchical clustering.

Results: The XFA captured a large proportion of both additive and non-additive G E. Significant G E for diameter growth can be expected between Tasmania and Mainland, and within Tasmania itself. The study also confirmed presence of G E between Murray Valley region in New South Wales and the rest of southern Australia.

Conclusion: The G E interaction at transcontinental scale can be correlated to the climate variables, primarily rainfall and temperature; however, the drivers of G E may also be related to smaller scale environmental variation

Item Details

Item Type:Refereed Article
Keywords:Pinus radiata, factor analysis, breeding zones, genotype deployment
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Population, Ecological and Evolutionary Genetics
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Softwood Plantations
Author:Dutkowski, G (Mr Greg Dutkowski)
ID Code:117923
Year Published:2015
Web of Science® Times Cited:5
Deposited By:Plant Science
Deposited On:2017-06-29
Last Modified:2017-11-23
Downloads:0

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