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Lu-Irving P, Bragg JG, Rossetto M, King K, O’Brien M, van der Merwe MM. Capturing Genetic Diversity in Seed Collections: An Empirical Study of Two Congeners with Contrasting Mating Systems. PLANTS (BASEL, SWITZERLAND) 2023; 12:522. [PMID: 36771606 PMCID: PMC9921034 DOI: 10.3390/plants12030522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/10/2023] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
Plant mating systems shape patterns of genetic diversity and impact the long-term success of populations. As such, they are relevant to the design of seed collections aiming to maximise genetic diversity (e.g., germplasm conservation, ecological restoration). However, for most species, little is known empirically about how variation in mating systems and genetic diversity is distributed. We investigated the relationship between genetic diversity and mating systems in two functionally similar, co-occurring species of Hakea (Proteaceae), and evaluated the extent to which genetic diversity was captured in seeds. We genotyped hundreds of seedlings and mother plants via DArTseq, and developed novel implementations of two approaches to inferring the mating system from SNP data. A striking contrast in patterns of genetic diversity between H. sericea and H. teretifolia was revealed, consistent with a contrast in their mating systems. While both species had mixed mating systems, H. sericea was found to be habitually selfing, while H. teretifolia more evenly employed both selfing and outcrossing. In both species, seed collection schemes maximised genetic diversity by increasing the number of maternal lines and sites sampled, but twice as many sites were needed for the selfing species to capture equivalent levels of genetic variation at a regional scale.
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Affiliation(s)
- Patricia Lu-Irving
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens Sydney, Mrs Macquaries Rd., Sydney, NSW 2000, Australia
| | - Jason G. Bragg
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens Sydney, Mrs Macquaries Rd., Sydney, NSW 2000, Australia
| | - Maurizio Rossetto
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens Sydney, Mrs Macquaries Rd., Sydney, NSW 2000, Australia
| | - Kit King
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens Sydney, Mrs Macquaries Rd., Sydney, NSW 2000, Australia
| | - Mitchell O’Brien
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens Sydney, Mrs Macquaries Rd., Sydney, NSW 2000, Australia
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Innovation Quarter Westmead, Level 3, East Tower, 158-164 Hawkesbury Rd., Westmead, NSW 2145, Australia
| | - Marlien M. van der Merwe
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, Royal Botanic Gardens Sydney, Mrs Macquaries Rd., Sydney, NSW 2000, Australia
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Walters SJ, Robinson TP, Byrne M, Nevill P. Seed sourcing in the genomics era: Multispecies provenance delineation for current and future climates. Restor Ecol 2022. [DOI: 10.1111/rec.13718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sheree J. Walters
- ARC Centre for Mine Site Restoration, School of Molecular and Life Sciences Curtin University Bentley WA 6102 Australia
| | - Todd P. Robinson
- School of Earth and Planetary Sciences Curtin University Bentley WA 6102 Australia
| | - Margaret Byrne
- Biodiversity and Conservation Science, Department of Biodiversity Conservation and Attractions, Locked Bag 104, Bentley Delivery Centre WA 6983 Australia
- School of Molecular and Life Sciences Curtin University Bentley WA 6102 Australia
| | - Paul Nevill
- ARC Centre for Mine Site Restoration, School of Molecular and Life Sciences Curtin University Bentley WA 6102 Australia
- Trace and Environmental DNA Laboratory, School of Molecular and Life Sciences Curtin University Bentley WA 6102 Australia
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Coleman MA, Bragg JG. A decision framework for evidence-based climate adaptation interventions. GLOBAL CHANGE BIOLOGY 2021; 27:472-474. [PMID: 33128838 DOI: 10.1111/gcb.15429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Climate change is outpacing the ability of species and populations to naturally adapt warranting active interventions to boost climate resilience. In their review paper, Gaitán-Espitia and Hobday discuss how such interventions may, however, counter natural evolutionary processes and adaptive capacity if not underpinned by background knowledge from genes through to ecosystems. They present a robust decision framework to guide implementation of climate adaptation interventions to avoid unintended evolutionary outcomes.
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Affiliation(s)
- Melinda A Coleman
- New South Wales Fisheries, National Marine Science Centre, Coffs Harbour, NSW, Australia
- Southern Cross University, National Marine Science Centre, Coffs Harbour, NSW, Australia
| | - Jason G Bragg
- Research Centre for Ecosystem Resilience, Australian Institute of Botanical Science, The Royal Botanic Garden Sydney, Sydney, NSW, Australia
- School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia
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