caa a22 4500 44585720X CHVBK 20180317145431.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10592-011-0258-1 doi (NATIONALLICENCE)springer-10.1007/s10592-011-0258-1 Limited pollen-mediated dispersal and partial self-incompatibility in the rare ironstone endemic Tetratheca paynterae subsp. paynterae increase the risks associated with habitat loss [Elektronische Daten] [P. Butcher, D. Bradbury, S. Krauss] Patterns of mating and dispersal are key factors affecting the dynamics, viability and evolution of plant populations. Changes in mating system parameters can provide evidence of anthropogenic impacts on populations of rare plants. Tetratheca paynterae subsp. paynterae is a critically endangered perennial shrub confined to a single ironstone range in Western Australia. Mining of the range removed 25% of plants in 2004 and further plants may be removed if the viability of the remaining populations is not compromised. To provide baseline genetic data for monitoring mining impacts, we characterised the mating system and pollen dispersal over two seasons in T. paynterae subsp. paynterae and compared mating system parameters with two other ironstone endemics, T. paynterae subsp. cremnobata and T. aphylla subsp. aphylla that were not impacted by mining. T. paynterae subsp. paynterae was the only taxon showing evidence of inbreeding (t m=0.89), although hand pollination revealed pre-zygotic self-incompatibility limits the production of seed from self-pollen. In a year of lower fruit set (2005), the estimate of correlated paternity increased from 20 to 35%. Direct estimates of realised pollen dispersal, made by paternity assignment in two small populations where all adult plants were genotyped, revealed a leptokurtic distribution with 30% of pollen dispersed less than 3m and 90% less than 15m. Restricted pollen dispersal maintains the strong genetic structuring of the adult populations in succeeding generations. As a consequence of preferential outcrossing, any reduction in effective population size, flowering plant density and/or the abundance and activity of pollinators may impact negatively on population viability through reduced seed set, increased inbreeding and increased correlated paternity. Springer Science+Business Media B.V., 2011 Tetratheca nationallicence Breeding system nationallicence Paternity analysis nationallicence Pollen flow nationallicence Microsatellite nationallicence Mining impacts nationallicence Butcher P. Kings Park and Botanic Garden, Botanic Gardens and Parks Authority, Fraser Avenue, 6005, West Perth, WA, Australia aut Bradbury D. Kings Park and Botanic Garden, Botanic Gardens and Parks Authority, Fraser Avenue, 6005, West Perth, WA, Australia aut Krauss S. Kings Park and Botanic Garden, Botanic Gardens and Parks Authority, Fraser Avenue, 6005, West Perth, WA, Australia aut Conservation Genetics Springer Netherlands 12/6(2011-12-01), 1603-1618 1566-0621 12:6<1603 2011 12 10592 https://doi.org/10.1007/s10592-011-0258-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-011-0258-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Butcher P. Kings Park and Botanic Garden, Botanic Gardens and Parks Authority, Fraser Avenue, 6005, West Perth, WA, Australia aut NATIONALLICENCE 700 1- Bradbury D. Kings Park and Botanic Garden, Botanic Gardens and Parks Authority, Fraser Avenue, 6005, West Perth, WA, Australia aut NATIONALLICENCE 700 1- Krauss S. Kings Park and Botanic Garden, Botanic Gardens and Parks Authority, Fraser Avenue, 6005, West Perth, WA, Australia aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/6(2011-12-01), 1603-1618 1566-0621 12:6<1603 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer