Flowering phenology in a Eucalyptus loxophleba seed orchard, heritability and genetic correlation with biomass production and cineole: breeding strategy implications
Reproductive synchronicity within a seed orchard facilitates gene exchange and reduces self-fertilisation. Here we assessed key flowering traits, biomass and foliar 1,8-cineole concentrations of Eucalyptus loxophleba (subsp. lissophloia and gratiae) in an open-pollinated seed orchard. Monthly flower...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Nature Publishing Group
2020
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| Online Access: | http://hdl.handle.net/20.500.11937/81077 |
| _version_ | 1848764312874647552 |
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| author | Spencer, Beren Mazanec, Richard Abadi, Amir Gibberd, Mark Zerihun, Ayalsew |
| author_facet | Spencer, Beren Mazanec, Richard Abadi, Amir Gibberd, Mark Zerihun, Ayalsew |
| author_sort | Spencer, Beren |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Reproductive synchronicity within a seed orchard facilitates gene exchange and reduces self-fertilisation. Here we assessed key flowering traits, biomass and foliar 1,8-cineole concentrations of Eucalyptus loxophleba (subsp. lissophloia and gratiae) in an open-pollinated seed orchard. Monthly flowering observations were made on 1142 trees from 60 families and nine provenances across 2 years. The percentage of trees flowering in both years was similar at 87%. There were differences between provenances and families within provenances for flowering traits, biomass and 1,8-cineole and interactions between provenances and year for flowering traits. Heritability of start and end flowering, and 1,8-cineole were high to moderate (h^2 = 0.75–0.45) and duration of flowering, propensity to flower and biomass estimates were moderate to low (h^2 = 0.31–0.10). Genetic and phenotypic correlations between flowering traits were high (rg = 0.96–0.63 and rp = 0.93–0.34) except between duration and end of flowering. The correlations were weaker between flowering traits and biomass or 1,8-cineole. ‘Dual flowering’, when trees underwent two reproductive cycles in a year, was responsible for out-of-phase flowering and those with low biomass and 1,8-cineole concentration should be removed from the breeding programme to hasten selection for desirable traits. |
| first_indexed | 2025-11-14T11:17:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-81077 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:17:22Z |
| publishDate | 2020 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-810772021-01-07T07:46:46Z Flowering phenology in a Eucalyptus loxophleba seed orchard, heritability and genetic correlation with biomass production and cineole: breeding strategy implications Spencer, Beren Mazanec, Richard Abadi, Amir Gibberd, Mark Zerihun, Ayalsew Reproductive synchronicity within a seed orchard facilitates gene exchange and reduces self-fertilisation. Here we assessed key flowering traits, biomass and foliar 1,8-cineole concentrations of Eucalyptus loxophleba (subsp. lissophloia and gratiae) in an open-pollinated seed orchard. Monthly flowering observations were made on 1142 trees from 60 families and nine provenances across 2 years. The percentage of trees flowering in both years was similar at 87%. There were differences between provenances and families within provenances for flowering traits, biomass and 1,8-cineole and interactions between provenances and year for flowering traits. Heritability of start and end flowering, and 1,8-cineole were high to moderate (h^2 = 0.75–0.45) and duration of flowering, propensity to flower and biomass estimates were moderate to low (h^2 = 0.31–0.10). Genetic and phenotypic correlations between flowering traits were high (rg = 0.96–0.63 and rp = 0.93–0.34) except between duration and end of flowering. The correlations were weaker between flowering traits and biomass or 1,8-cineole. ‘Dual flowering’, when trees underwent two reproductive cycles in a year, was responsible for out-of-phase flowering and those with low biomass and 1,8-cineole concentration should be removed from the breeding programme to hasten selection for desirable traits. 2020 Journal Article http://hdl.handle.net/20.500.11937/81077 10.1038/s41598-020-72346-3 http://creativecommons.org/licenses/by/4.0/ Nature Publishing Group fulltext |
| spellingShingle | Spencer, Beren Mazanec, Richard Abadi, Amir Gibberd, Mark Zerihun, Ayalsew Flowering phenology in a Eucalyptus loxophleba seed orchard, heritability and genetic correlation with biomass production and cineole: breeding strategy implications |
| title | Flowering phenology
in a Eucalyptus loxophleba seed
orchard, heritability and genetic
correlation with biomass
production and cineole: breeding
strategy implications |
| title_full | Flowering phenology
in a Eucalyptus loxophleba seed
orchard, heritability and genetic
correlation with biomass
production and cineole: breeding
strategy implications |
| title_fullStr | Flowering phenology
in a Eucalyptus loxophleba seed
orchard, heritability and genetic
correlation with biomass
production and cineole: breeding
strategy implications |
| title_full_unstemmed | Flowering phenology
in a Eucalyptus loxophleba seed
orchard, heritability and genetic
correlation with biomass
production and cineole: breeding
strategy implications |
| title_short | Flowering phenology
in a Eucalyptus loxophleba seed
orchard, heritability and genetic
correlation with biomass
production and cineole: breeding
strategy implications |
| title_sort | flowering phenology
in a eucalyptus loxophleba seed
orchard, heritability and genetic
correlation with biomass
production and cineole: breeding
strategy implications |
| url | http://hdl.handle.net/20.500.11937/81077 |