Genetic diversity and population structure of Eugenia dysenterica DC. (``cagaiteira'' – Myrtaceae) in Central Brazil: Spatial analysis and implications for conservation and management

Angelica palustris (B ESSER ) H OFFM . (Apiaceae) is a rare wetland community species that is currently rapidly declining because of changes in land use. In the present study, we analyzed patterns of random amplified polymorphic DNA (RAPD) variation among nine populations of A. palustris in Germany to assess its overall genetic condition. We aimed to examine the level of genetic diversity as well as its local differentiation in relation to population size and geographic distancing between populations. Results achieved from f f f f ST statistics and AMOVA indicated that most of the variability is distributed among individuals within the populations (57.7%), whereas among-population variation accounted for 30.2% of the variation. Variation between regions was 12.1%. This corresponds to the results of a multivariate analysis based on the asymmetric Soerensen similarity, which also suggested a strong population differentiation, as would be expected from a short-lived species with limited seed dispersal capacities that had never covered extensive areas in Eastern Germany. Consistently the geographic differentiation was not reflected in the RAPD profile. Significant correlations were noted between population size and the percentage of polymorphic loci ( P < < < < 0.05) and genetic diversity ( P < < < < 0.05). An analysis of seed production showed positive relationships between average seed number and levels of genetic variation. Our results support concerns regarding the loss of genetic diversity in endangered plant populations because this process might have harmful effects on reproductive fitness.

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“…This contradicts the results of similar studies (e.g. Pires de Campos Telles et al . 2003; Hensen & Oberprieler 2005; Hensen et al .…”

Section: Discussioncontrasting

confidence: 99%

“…This contradicts the results of similar studies (e.g. Pires de Campos Telles et al 2003;, but corresponds well to our assumption that we are not dealing with a plant species that was once widespread, but rather with…”

Section: Analysis Of Genetic Structuresupporting

confidence: 60%

Genetic structure and random amplified polymorphic DNA diversity of the rapidly decliningAngelica palustris(Apiaceae) in Eastern Germany in relation to population size and seed production

Dittbrenner

Hensen

Wesche

2005

Plant Species Biology

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“…Zucchi et al (2003Zucchi et al ( , 2005 interpreted the high Mantel correlation as an indicative of IBD, but actually many distinct ecological and evolutionary processes generate strong spatial patterns (see Meirmans, 2012). For instance, these analyses were based on overall multivariate distances, so it was not possible to infer processes from these more complex patterns of variation among loci (e.g., Sokal and Wartenberg, 1983;Diniz-Filho and Bini, 2012). Mantel correlation across species range observed here is actually lower than previous studies.…”

Section: Discussionmentioning

confidence: 55%

Range-wide genetic differentiation of Eugenia dysenterica (Myrtaceae) populations in Brazilian Cerrado

Barbosa

Collevatti

Chaves

et al. 2015

Biochemical Systematics and Ecology

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“…In this way, more optimal conservation management could be designed if significant intercepts are obtained from spatial autocorrelation analyses (Brauer, Unmack, Hammer, Adams, & Beheregaray, 2013;Campos Telles, Guedes Coelho, Chaves, Diniz-Filho, & D'Ayala Valva, 2003;Chung et al, 2006;Diniz-Filho & Campos Telles, 2002;Hrbek, Crossa, & Farias, 2007). In this way, more optimal conservation management could be designed if significant intercepts are obtained from spatial autocorrelation analyses (Brauer, Unmack, Hammer, Adams, & Beheregaray, 2013;Campos Telles, Guedes Coelho, Chaves, Diniz-Filho, & D'Ayala Valva, 2003;Chung et al, 2006;Diniz-Filho & Campos Telles, 2002;Hrbek, Crossa, & Farias, 2007).…”

Section: Discussionmentioning

confidence: 99%

Fine‐scale hierarchical genetic structure and kinship analysis of the ascidian Pyura chilensis in the southeastern Pacific

Morales-González

Giles

Quesada-Calderón

et al. 2019

Ecology and Evolution

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Studying population structure and genetic diversity at fine spatial scales is key for a better understanding of demographic processes that influence population connectivity. This is particularly important in marine benthic organisms that rely on larval dispersal to maintain connectivity among populations. Here, we report the results of a genetic survey of the ascidian Pyura chilensis from three localities along the southeastern Pacific. This study follows up on a previous report that described a genetic break in this region among localities only 20 km apart. By implementing a hierarchical sampling design at four spatial levels and using ten polymorphic microsatellite markers, we test whether differences in fine‐scale population structure explain the previously reported genetic break. We compared genetic spatial autocorrelations, as well as kinship and relatedness distributions within and among localities adjacent to the genetic break. We found no evidence of significant autocorrelation at the scale up to 50 m despite the low dispersal potential of P. chilensis that has been reported in the literature. We also found that the proportion of related individuals in close proximity (<1 km) was higher than the proportion of related individuals further apart. These results were consistent in the three localities. Our results suggest that the spatial distribution of related individuals can be nonrandom at small spatial scales and suggests that dispersal might be occasionally limited in this species or that larval cohorts can disperse in the plankton as clustered groups. Overall, this study sheds light on new aspects of the life of this ascidian as well as confirms the presence of a genetic break at 39°S latitude. Also, our data indicate there is not enough evidence to confirm that this genetic break can be explained by differences in fine‐scale genetic patterns among localities.

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Genetic diversity and population structure of Eugenia dysenterica DC. (``cagaiteira'' – Myrtaceae) in Central Brazil: Spatial analysis and implications for conservation and management

Cited by 37 publications

References 33 publications

Genetic structure and random amplified polymorphic DNA diversity of the rapidly decliningAngelica palustris(Apiaceae) in Eastern Germany in relation to population size and seed production

Genetic structure and random amplified polymorphic DNA diversity of the rapidly decliningAngelica palustris(Apiaceae) in Eastern Germany in relation to population size and seed production

Range-wide genetic differentiation of Eugenia dysenterica (Myrtaceae) populations in Brazilian Cerrado

Fine‐scale hierarchical genetic structure and kinship analysis of the ascidian Pyura chilensis in the southeastern Pacific

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