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Genetic control of Eucalyptus globulus seed germination

Citation

Rix, KD and Gracie, AJ and Potts, BM and Brown, PH and Gore, PL, Genetic control of Eucalyptus globulus seed germination, Annals of Forest Science, 72, (4) pp. 457-467. ISSN 1286-4560 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 NRA and Springer-Verlag

DOI: doi:10.1007/s13595-014-0450-9

Abstract

Key message The maternal genotype has a significant effect on most germination traits of Eucalyptus globulus seeds. These differences can be partly explained by genetic-based differences amongst races, including differences in sensitivity to high temperatures which may be of adaptive significance.

Context Slow and uneven germination of Eucalyptus globulus seeds in commercial nurseries can be a problem which has been linked with periods of high temperature.

Aims This study aimed to determine whether maternal genotype affects the germination of E. globulus seeds.

Methods By sampling seeds over two seasons from multiple randomised ramets (trees) of maternal genotypes from three races of E. globulus growing in a seed orchard, the extent of genetic control of seed germination responses was assessed at different germination temperatures.

Results Maternal genotype had a significant effect on most germination traits but a differential response to temperature was more evident for germination proportion than rate traits. Maternal races differed in their rate of seedling development regardless of temperature, but differences in the germination proportion were only detected at high temperatures.

Conclusion The present study highlights the potential adaptive significance of the germination response and the need for seed lot-specific germination testing as both genetics and maternal environment vary.

Item Details

Item Type:Refereed Article
Keywords:seed production, Eucalyptus globulus, genetic germination, genetic regulation
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Horticultural Crop Growth and Development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Industrial Crops
Objective Field:Industrial Crops not elsewhere classified
Author:Rix, KD (Dr Kieren Rix)
Author:Gracie, AJ (Dr Alistair Gracie)
Author:Potts, BM (Professor Brad Potts)
ID Code:100460
Year Published:2015
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-05-18
Last Modified:2016-05-06
Downloads:0

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