File(s) not publicly available

Genetic control of Eucalyptus globulus seed germination

journal contribution
posted on 06.12.2017, 00:00 authored by K Rix, A Gracie, B Potts, Philip BrownPhilip Brown, P Gore
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.

Funding

Category 3 - Industry and Other Research Income

History

Volume

72

Issue

4

Start Page

457

End Page

467

Number of Pages

11

eISSN

1297-966X

ISSN

1286-4560

Location

France

Publisher

Springer-Verlag

Language

en-aus

Peer Reviewed

Yes

Open Access

No

Era Eligible

Yes

Journal

Annals of forest science.