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Felmy A, Streiff AB, Jokela J. Propensity for selfing varies within a population of hermaphroditic snails: coexistence of selfers, outcrossers and mixed-mating individuals. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230532. [PMID: 37800152 PMCID: PMC10548103 DOI: 10.1098/rsos.230532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 09/05/2023] [Indexed: 10/07/2023]
Abstract
To understand mating-system evolution in self-compatible hermaphrodites, variation in selfing rates is highly relevant. Empirical studies are rarely designed to capture variation between individuals, instead often comparing species and populations. Yet, evolution primarily occurs within populations, rendering among-individual variation essential. Observed individual selfing rates depend on the environment (e.g. differences in mate availability) and individuals' propensity for selfing. We quantified individual variation in selfing propensity in the snail Radix balthica by conducting laboratory mating trials that manipulated mate availability (low versus moderate) and estimating selfing rates from progeny arrays. We also measured female lifetime fitness. We found substantial among-individual variation in selfing propensity, including pure selfers (32%), pure outcrossers (31%) and mixed-mating individuals that selfed and outcrossed (37%). Experimental levels of mate availability did not significantly affect selfing rates. Selfers had reduced female liftetime fitness. Our results show that the propensity for selfing can differ considerably among individuals, with similar proportions of selfers, outcrossers and mixed maters. As mate availability did not affect selfing, our 'moderate' experimental level of mate availability might still have been too low to prompt selfers to outcross. This and the observed fitness differences also cautiously suggest that investigating the heritability of selfing propensities might be worthwhile in this population.
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Affiliation(s)
- Anja Felmy
- Department of Biology, Aquatic Ecology Unit, Lund University, 22362 Lund, Sweden
- Department of Aquatic Ecology, EAWAG, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland
- ETH Zurich, D-USYS, Institute of Integrative Biology, 8092 Zürich, Switzerland
| | - Alena B. Streiff
- Department of Aquatic Ecology, EAWAG, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland
- ETH Zurich, D-USYS, Institute of Integrative Biology, 8092 Zürich, Switzerland
| | - Jukka Jokela
- Department of Aquatic Ecology, EAWAG, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland
- ETH Zurich, D-USYS, Institute of Integrative Biology, 8092 Zürich, Switzerland
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Diaz-Martin Z, Browne L, Cabrera D, Olivo J, Karubian J. Impacts of Flowering Density on Pollen Dispersal and Gametic Diversity Are Scale Dependent. Am Nat 2023; 201:52-64. [PMID: 36524929 DOI: 10.1086/721918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AbstractPollen dispersal is a key evolutionary and ecological process, but the degree to which variation in the density of concurrently flowering conspecific plants (i.e., coflowering density) shapes pollination patterns remains understudied. We monitored coflowering density and corresponding pollination patterns of the insect-pollinated palm Oenocarpus bataua in northwestern Ecuador and found that the influence of coflowering density on these patterns was scale dependent: high neighborhood densities were associated with reductions in pollen dispersal distance and gametic diversity of progeny arrays, whereas we observed the opposite pattern at the landscape scale. In addition, neighborhood coflowering density also impacted forward pollen dispersal kernel parameters, suggesting that low neighborhood densities encourage pollen movement and may promote gene flow and genetic diversity. Our work reveals how coflowering density at different spatial scales influences pollen movement, which in turn informs our broader understanding of the mechanisms underlying patterns of genetic diversity and gene flow within populations of plants.
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Mating Systems of Single Families and Population Genetic Diversity of Endangered Ormosia hosiei in South China. Genes (Basel) 2022; 13:genes13112117. [DOI: 10.3390/genes13112117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/24/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Ormosia hosiei is a tree species native to China that has been extensively used for ornamental and furniture purposes due to its valued timber. The mating system has substantial impact on genetic diversity and structure of plant natural population. Such information should be considered when planning tree planting for forest restoration. Here we used 12 microsatellite markers and described the mating system of single families and the population genetic diversity of O. hosiei. A high level of genetic diversity was observed in both adults and progenies, although slight differences existed among populations and their progenies, with the expected heterozygosity ranging from 0.763 to 0.794. Overall, O. hosiei displayed a predominantly outcrossed mating. The estimate of multi-locus outcrossing rate (tm) was high with low variations among families, ranged from 0.997 to 1.000. The value of tm-ts, ranged from 0.000 to 0.139, indicated that biparental inbreeding occurred in progenies. Therefore, to obtain a reasonable genetic representation of native tree species and prevent problems associated with inbreeding depression, we suggested effective in situ conservation by replanting seedlings, but seedling production for restoration purposes may require a much larger sampling effort than is currently used. Moreover, it is necessary to conduct further multiple population and multi-year experiments to verify our conclusions.
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Li WJ, Huang ZX, Han M, Ren Y, Zhang XH. Development and structure of four different stamens in Clematis macropetala (Ranunculaceae): particular emphasis on staminodes and staminal nectary. PROTOPLASMA 2022; 259:627-640. [PMID: 34247271 DOI: 10.1007/s00709-021-01687-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 06/29/2021] [Indexed: 05/25/2023]
Abstract
The stamens of angiosperms are diverse in number, colour and structure. The morphological and structural changes of stamens show important evolutionary significance for improving pollination efficiency. In Clematis macropetala, the androecium consists of fertile stamens and tepaloid staminodes. However, studies on the developmental features, structures and possible functions of stamens are few. In this study, the stamen ontogeny, micromorphology and nectary structure of C. macropetala were studied by scanning electron microscopy, light microscopy and transmission electron microscopy. The results indicate that the stamens can be divided into four forms according to shape and anther size: tepaloid staminode (St1), spatulate staminode (St2), linear-spatulate fertile stamen (St3) and linear fertile stamen (St4). The characteristics of stamen development are similar in the early stage but gradually differentiate in the later stage. St1 has delayed development and no anther differentiation. St2 develops abnormally at the early stage of anther differentiation. St3 and St4 are fertile, but their anther sizes are different. Nine epidermal cell types were observed in stamens, with only 4 types in St1 and 6-7 types in St2, St3 and St4. Nectary tissue appears on the adaxial side of the filament base. The nectary is composed of only one layer of secretory epidermal cells, which have a large nucleus, dense cytoplasm and well-developed wall ingrowth. Nectar is released through micro-channels in the cuticle of the outer wall. In Ranunculaceae, the staminal nectary is often located on fertile or sterile stamens, and the position, structure and micromorphology of secretory tissues of the stamen within Ranunculales are discussed.
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Affiliation(s)
- Wen-Juan Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Zi-Xuan Huang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Meng Han
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Yi Ren
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
- Key Laboratory of Medicinal Plant Resource and Natural Pharmaceutical Chemistry of Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China
| | - Xiao-Hui Zhang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China.
- Key Laboratory of Medicinal Plant Resource and Natural Pharmaceutical Chemistry of Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China.
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Teixeira TM, Nazareno AG. One Step Away From Extinction: A Population Genomic Analysis of A Narrow Endemic, Tropical Plant Species. FRONTIERS IN PLANT SCIENCE 2021; 12:730258. [PMID: 34630476 PMCID: PMC8496504 DOI: 10.3389/fpls.2021.730258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Intraspecific genetic variation plays a fundamental role in maintaining the evolutionary potential of wild populations. Hence, the assessment of genetic diversity patterns becomes essential to guide biodiversity conservation policies, particularly for threatened species. To inform management strategies for conservation of Mimosa catharinensis - a narrow endemic, critically endangered plant species - we identified 1,497 unlinked SNP markers derived from a reduced representation sequencing method (i.e., double digest restriction site associated DNA sequencing, or ddRADseq). This set of molecular markers was employed to assess intrapopulation genetic parameters and the demographic history of one extremely small population of M. catharinensis (N=33) located in the Brazilian Atlantic Forest. Contrary to what is expected for narrow endemic and threatened species with small population sizes, we observed a moderate level of genetic diversity for M. catharinensis [uH E(0%missing data)=0.205, 95% CI (0.160, 0.250); uH E(30%missing data)=0.233, 95% CI (0.174, 0.292)]. Interestingly, M. catharinensis, which is a lianescent shrub with no indication of seed production for at least two decades, presented high levels of outcrossing [t (0%missing data)=0.883, SE±0.0483; t (30%missing data)=0.909, SE±0.011] and an apparent absence of inbreeding [F (0%missing data)=-0.145, 95% CI (-0.189, -0.101); F (30%missing data)=-0.105, 95% CI (-0.199, -0.011)]. However, the reconstruction of demographic history of M. catharinensis indicated that the population should be suffered a recent bottleneck. Our population genomic study tackles a central issue in evolution and conservation biology and we expect that it will be useful to help safeguard the remaining genetic diversity reported for this unique genetic resource.
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Affiliation(s)
- Thais M. Teixeira
- Department of Genetics, Ecology and Evolution, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Alison G. Nazareno
- Department of Genetics, Ecology and Evolution, Federal University of Minas Gerais, Belo Horizonte, Brazil
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, United States
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Alzate-Marin AL, Rivas PMS, Galaschi-Teixeira JS, Bonifácio-Anacleto F, Silva CC, Schuster I, Nazareno AG, Giuliatti S, da Rocha Filho LC, Garófalo CA, Martinez CA. Warming and elevated CO 2 induces changes in the reproductive dynamics of a tropical plant species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 768:144899. [PMID: 33736351 DOI: 10.1016/j.scitotenv.2020.144899] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
Tropical plant species are vulnerable to climate change and global warming. Since flowering is a critical factor for plant reproduction and seed-set, warming and elevated atmospheric carbon dioxide concentrations (eCO2) are crucial climate change factors that can affect plant reproductive dynamics and flowering related events in the tropics. Using a combined free-air CO2 enrichment and a free-air temperature-controlled enhancement system, we investigate how warming (+2 °C above ambient, eT) and elevated [CO2] (~600 ppm, eCO2) affect the phenological pattern, plant-insect interactions, and outcrossing rates in the tropical legume forage species Stylosanthes capitata Vogel (Fabaceae). In comparison to the control, a significantly greater number of flowers (NF) per plot (+62%) were observed in eT. Furthermore, in warmed plots flowers began opening approximately 1 h earlier (~09:05), with a canopy temperature of ~23 °C, than the control (~09:59) and eCO2 (~09:55) treatments. Flower closure occurred about 3 h later in eT (~11:57) and control (~13:13), with a canopy temperature of ~27 °C. These changes in flower phenology increased the availability of floral resources and attractiveness for pollinators such as Apis mellifera L. and visitors such as Paratrigona lineata L., with significant interactions between eT treatments and insect visitation per hour/day, especially between 09:00-10:40. In comparison to the control, the additive effects of combined eCO2 + eT enhanced the NF by 137%, while the number of A. mellifera floral visits per plot/week increased by 83% during the period of greatest flower production. Although we found no significant effect of treatments on mating system parameters, the overall mean multilocus outcrossing rate (tm = 0.53 ± 0.03) did confirm that S. capitata has a mixed mating system. The effects of elevated [CO2] and warming on plant-pollinator relationships observed here may have important implications for seed production of tropical forage species in future climate scenarios.
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Affiliation(s)
- Ana Lilia Alzate-Marin
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil; Department of Genetics, Graduate Program in Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil.
| | - Priscila Marlys Sá Rivas
- Department of Genetics, Graduate Program in Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Juliana S Galaschi-Teixeira
- Department of Biology, Ribeirão Preto School of Philosophy, Science and Literature, University of São Paulo, Av. Bandeirantes 3900, 14040-901 Ribeirão Preto, SP, Brazil
| | - Fernando Bonifácio-Anacleto
- Department of Genetics, Graduate Program in Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Carolina Costa Silva
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Ivan Schuster
- Longping High-Tech, SP-330, km 296, 14140-000 Cravinhos, SP, Brazil
| | - Alison Gonçalves Nazareno
- The Biosciences Institute (IB), University of São Paulo, Rua do Matão, Tv. 14 - Butantã, 05508-090 São Paulo, SP, Brazil; Department of Genetics, Ecology and Evolution, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627 - Pampulha/Caixa Postal 486, 31270-901 Belo Horizonte, MG, Brazil
| | - Silvana Giuliatti
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil; Department of Genetics, Graduate Program in Genetics, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Léo Correia da Rocha Filho
- Department of Biology, Ribeirão Preto School of Philosophy, Science and Literature, University of São Paulo, Av. Bandeirantes 3900, 14040-901 Ribeirão Preto, SP, Brazil
| | - Carlos A Garófalo
- Department of Biology, Ribeirão Preto School of Philosophy, Science and Literature, University of São Paulo, Av. Bandeirantes 3900, 14040-901 Ribeirão Preto, SP, Brazil
| | - Carlos A Martinez
- Department of Biology, Ribeirão Preto School of Philosophy, Science and Literature, University of São Paulo, Av. Bandeirantes 3900, 14040-901 Ribeirão Preto, SP, Brazil.
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Feres JM, G Nazareno A, Borges LM, Corbo Guidugli M, Bonifacio-Anacleto F, Alzate-Marin AL. Depicting the mating system and patterns of contemporary pollen flow in trees of the genus Anadenanthera (Fabaceae). PeerJ 2021; 9:e10579. [PMID: 33868794 PMCID: PMC8035892 DOI: 10.7717/peerj.10579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 11/24/2020] [Indexed: 12/11/2022] Open
Abstract
Anadenanthera (Fabaceae) is endemic to the Neotropics and consists of two tree species: A. colubrina (Vell.) Brenan and A. peregrina (L.) Speg. This study examined the mating system and contemporary gene flow of A. colubrina (Acol) and A. peregrina (Aper) in a highly fragmented area of the Atlantic Forest to provide valuable information that informs conservation strategies. Reproductive adults from forest remnants [n A. colubrina = 30 (2.7 ha), n A. peregrina = 55 (4.0 ha)] and progeny-arrays (n A. colubrina = 322, n A. peregrina = 300) were genotyped for seven nuclear microsatellite markers. Mating system analyses revealed that A. colubrina is a mixed mating species (tm = 0.619) while A. peregrina is a predominantly outcrossing species (tm = 0.905). For both Anadenanthera species, high indices of biparental inbreeding were observed (Acol = 0.159, Aper = 0.216), resulting in low effective pollination neighborhood sizes. Categorical paternity analysis revealed different scales of pollen dispersal distance: the majority of crossings occurring locally (i.e., between nearby trees within the same population), with moderate pollen dispersal coming from outside the forest fragments boundaries (Acol mp = 30%, Aper mp = 35%). Nevertheless, pollen immigration from trees outside the populations for both species suggests that the populations are not reproductively isolated. This study highlights the importance of evaluating both mating system and contemporary gene flow for a better understanding of the biology of Anadenanthera species. This information should be considered to ensure the effective conservation and management practices of these plant species.
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Affiliation(s)
- Juliana Massimino Feres
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Alison G Nazareno
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leonardo M Borges
- Departamento de Botânica, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Marcela Corbo Guidugli
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Fernando Bonifacio-Anacleto
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Ana Lilia Alzate-Marin
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, SP, Brazil
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Van Etten ML, Sukkaewnmanee P, Tate JA, Robertson AW. Pollinator service affects quantity but not quality of offspring in a widespread New Zealand endemic tree species. CONSERV GENET 2018. [DOI: 10.1007/s10592-018-1056-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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9
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Bawa KS. Kin selection and the evolution of plant reproductive traits. Proc Biol Sci 2017; 283:rspb.2016.0789. [PMID: 27852800 PMCID: PMC5124086 DOI: 10.1098/rspb.2016.0789] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/24/2016] [Indexed: 11/12/2022] Open
Abstract
Competition among developing seeds and sibling rivalry within multiovulated ovaries can be deleterious for both the maternal parent and the siblings. Increased genetic relatedness of seeds within the ovary may foster kin selection and reduce the deleterious consequences of sibling competition. The pollen parent may also be selected for siring all progeny within a fruit. I propose a series of hypotheses to explain the evolution of a number of reproductive traits in angiosperms in the context of kin selection and sibling rivalry within the ovaries of angiosperms. I present evidence to show that a single-pollen parent, indeed, often sires seeds within multiovulated ovaries. Various types of pollen aggregations and transfer of such pollen masses to the stigmas of flowers by specialized pollinators make this increased genetic relatedness possible. An alternative mode to reduce sibling rivalry may be the reduction of ovule number to one, an evolutionary trend that has independently occurred many times in flowering plants. Finally, I build on previously established correlations to predict two sets of correlations among reproductive traits. In the first case, large showy flowers, transfer of pollen en masse by specialized pollinators, and multiovulated ovaries and multisided fruits seem to be correlated. In the second case, the previously established correlations among small and inconspicuous flowers, pollination by wind, water or generalist insects, flowers and fruits with few or single ovules and seeds, respectively, may also include monoecy or dioecy. Although correlations among many of these traits have been established in the past, I invoke kin selection and sibling competition to explain the evolution of correlated traits as two distinct evolutionary pathways in angiosperms.
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Affiliation(s)
- Kamaljit S Bawa
- Department of Biology, University of Massachusetts, Boston, MA 02125-3393, USA .,Ashoka Trust for Research in Ecology and the Environment, Bangalore, Karnataka 560064, India
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Silvestre EDA, Schwarcz KD, Grando C, de Campos JB, Sujii PS, Tambarussi EV, Macrini CMT, Pinheiro JB, Brancalion PHS, Zucchi MI. Mating System and Effective Population Size of the Overexploited Neotropical Tree (Myroxylon peruiferum L.f.) and Their Impact on Seedling Production. J Hered 2017; 109:264-271. [DOI: 10.1093/jhered/esx096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 11/07/2017] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Kaiser Dias Schwarcz
- Agência Paulista de Tecnologia dos Agronegócios, Polo Regional de Desenvolvimento Tecnológico do Centro Sul, Brasil
| | - Carolina Grando
- Universidade Estadual de Campinas, Instituto de Biologia, Brasil
| | | | | | | | | | - José Baldin Pinheiro
- Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Genética, Brasil
| | | | - Maria Imaculada Zucchi
- Agência Paulista de Tecnologia dos Agronegócios, Polo Regional de Desenvolvimento Tecnológico do Centro Sul, Brasil
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Lanes ÉCM, Motoike SY, Kuki KN, Resende MDV, Caixeta ET. Mating System and Genetic Composition of the Macaw Palm (Acrocomia aculeata): Implications for Breeding and Genetic Conservation Programs. J Hered 2016; 107:527-36. [PMID: 27288529 DOI: 10.1093/jhered/esw038] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 05/24/2016] [Indexed: 11/13/2022] Open
Abstract
Acrocomia aculeata (Arecaceae), a palm endemic to South and Central America, is a potential oil crop. Knowledge of the mating system of this species is limited to its reproductive biology and to studies using molecular markers. The present study analyzed genetic diversity between its developmental stages and determined its prevailing mating system in order to support genetic conservation and breeding programs. We tested 9 microsatellite markers in 27 mother trees (adult plants) and 157 offspring (juvenile plants) from the southeastern region of Brazil. Heterozygosity levels differed between the 2 studied life stages, as indicated by the fixation index of adult and juvenile trees, suggesting that selection against homozygotes occurs during the plant life cycle. The mating system parameters analyzed indicate that A. aculeata is predominantly outcrossing (allogamous). However, its low levels of selfing suggest that there is individual variation with regard to self-incompatibility, which can be a survival strategy in isolated or fragmented habitats. Deviations in variance effective size were detected because of high mating rates among relatives and correlated matings. These findings indicate that the main source of inbreeding results from biparental inbreeding in the population and that the progenies are predominantly composed of full-sibs. The information provided by this study on the ecology and reproduction dynamics of A. aculeata should be useful to both breeding and genetic conservation programs, allowing the development of more precise mathematical models and the estimation of the appropriate number of mother trees for seed collection.
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Affiliation(s)
- Éder C M Lanes
- From the Laboratory of Biotechnology and Plant Breeding, Department of Plant Science, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Lanes, Motoike, and Kuki); Department of Forest Engineering, Embrapa Forestry/Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Resende); and Institute of Biotechnology Applied to Agriculture (BIOAGRO), Embrapa Coffee/Federal University of Viçosa, BioCafé, 36570-000 Viçosa, MG, Brazil (Caixeta).
| | - Sérgio Y Motoike
- From the Laboratory of Biotechnology and Plant Breeding, Department of Plant Science, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Lanes, Motoike, and Kuki); Department of Forest Engineering, Embrapa Forestry/Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Resende); and Institute of Biotechnology Applied to Agriculture (BIOAGRO), Embrapa Coffee/Federal University of Viçosa, BioCafé, 36570-000 Viçosa, MG, Brazil (Caixeta)
| | - Kacilda N Kuki
- From the Laboratory of Biotechnology and Plant Breeding, Department of Plant Science, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Lanes, Motoike, and Kuki); Department of Forest Engineering, Embrapa Forestry/Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Resende); and Institute of Biotechnology Applied to Agriculture (BIOAGRO), Embrapa Coffee/Federal University of Viçosa, BioCafé, 36570-000 Viçosa, MG, Brazil (Caixeta)
| | - Marcos D V Resende
- From the Laboratory of Biotechnology and Plant Breeding, Department of Plant Science, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Lanes, Motoike, and Kuki); Department of Forest Engineering, Embrapa Forestry/Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Resende); and Institute of Biotechnology Applied to Agriculture (BIOAGRO), Embrapa Coffee/Federal University of Viçosa, BioCafé, 36570-000 Viçosa, MG, Brazil (Caixeta)
| | - Eveline T Caixeta
- From the Laboratory of Biotechnology and Plant Breeding, Department of Plant Science, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Lanes, Motoike, and Kuki); Department of Forest Engineering, Embrapa Forestry/Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil (Resende); and Institute of Biotechnology Applied to Agriculture (BIOAGRO), Embrapa Coffee/Federal University of Viçosa, BioCafé, 36570-000 Viçosa, MG, Brazil (Caixeta)
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Wang J, Kang M, Huang H. Long-distance pollen dispersal ensures genetic connectivity of the low-density tree species, Eurycorymbus cavaleriei, in a fragmented karst forest landscape. CONSERV GENET 2014. [DOI: 10.1007/s10592-014-0608-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Gonela A, Sebbenn A, Soriani H, Mestriner M, Martinez C, Alzate-Marin A. Genetic diversity and mating system of Copaifera langsdorffii (Leguminosae/Caesalpinioideae). GENETICS AND MOLECULAR RESEARCH 2013; 12:569-80. [DOI: 10.4238/2013.february.27.6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lobo J, Solís S, Fuchs EJ, Quesada M. Individual and Temporal Variation in Outcrossing Rates and Pollen Flow Patterns inCeiba pentandra(Malvaceae: Bombacoidea). Biotropica 2012. [DOI: 10.1111/btp.12001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Jorge Lobo
- Escuela de Biología; Universidad de Costa Rica; 2060; San José; Costa Rica
| | - Silvia Solís
- Centro de Investigaciones en Ecosistemas; Universidad Nacional Autónoma de México; Apartado Postal 27-3 (Xangari); 58089; Morelia; Michoacan; Mexico
| | - Eric J. Fuchs
- Escuela de Biología; Universidad de Costa Rica; 2060; San José; Costa Rica
| | - Mauricio Quesada
- Centro de Investigaciones en Ecosistemas; Universidad Nacional Autónoma de México; Apartado Postal 27-3 (Xangari); 58089; Morelia; Michoacan; Mexico
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