scholarly journals Seed characteristic variations and genetic structure of wildZizania latifoliaalong a latitudinal gradient in China: implications for neo-domestication as a grain crop

AoB Plants ◽  
2018 ◽  
Vol 10 (6) ◽  
Author(s):  
Yao Zhao ◽  
Lan Zhong ◽  
Kai Zhou ◽  
Zhiping Song ◽  
Jiakuan Chen ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Latitudinal Gradient ◽  
Grain Crop

scholarly journals Genetic structure and bio-climatic modeling support allopatric over parapatric speciation along a latitudinal gradient

2012 ◽  
Vol 12 (1) ◽  
pp. 149 ◽  
Author(s):  
Maurizio Rossetto ◽  
Chris B Allen ◽  
Katie AG Thurlby ◽  
Peter H Weston ◽  
Melita L Milner
Keyword(s):  
Genetic Structure ◽  
Latitudinal Gradient ◽  
Parapatric Speciation

scholarly journals Genetic Variability and Structure of The Wild Service Tree (Sorbus torminalis (L.) Crantz) in Poland

2006 ◽  
Vol 55 (1-6) ◽  
pp. 197-202 ◽  
Author(s):  
Leszek Bednorz ◽  
Ł Myczko ◽  
P. Kosiński
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Latitudinal Gradient ◽  
Forest Tree ◽  
Species Level ◽  
The Other ◽  
Clonal Population ◽  
Sorbus Torminalis ◽  
Geographic Structure ◽  
Wild Service Tree

Abstract Sorbus torminalis is a rare forest tree species in Poland. Allelic and genotypic structures at 25 isozyme gene loci were observed in 20 populations from Poland, situated mainly along a latitudinal gradient. Levels of genetic diversity were high both at the species level (P = 44%, He = 0.435) and within populations (mean P = 40.8%, mean He = 0.373). Levels of differentiation among populations were relatively high (FST = 0.17) and a noticeable geographic structure of this differentiation was detected. The population in the ‘Brekinia’ reserve had a unique genetic structure of a clonal population and was the most distinct from the other populations.

scholarly journals Ecology and Genetic Structure of the Parasitoid Phobocampe confusa (Hymenoptera: Ichneumonidae) in Relation to Its Hosts, Aglais Species (Lepidoptera: Nymphalidae)

Insects ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 478
Author(s):  
Hélène Audusseau ◽  
Gaspard Baudrin ◽  
Mark R. Shaw ◽  
Naomi L. P. Keehnen ◽  
Reto Schmucki ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Latitudinal Gradient ◽  
Biotic Interactions ◽  
Climatic Conditions ◽  
Butterfly Species ◽  
Natural Ecosystems ◽  
Low Genetic Diversity ◽  
Key Species ◽  
Genomics Tools ◽  
Butterfly Larvae

The biology of parasitoids in natural ecosystems remains very poorly studied, though they are key species for their functioning. Here we focused on Phobocampe confusa, a Nymphalini specialist, responsible for high mortality rates in charismatic butterfly species in Europe (genus Aglais). We studied its ecology and genetic structure in connection with those of its host butterflies in Sweden. To this aim, we gathered data from 428 P. confusa individuals reared from 6094 butterfly larvae (of A. urticae, A. io, and in two occasions of Araschnia levana) collected over two years (2017 and 2018) and across 19 sites distributed along a 500 km latitudinal gradient. We found that P. confusa is widely distributed along the latitudinal gradient. Its distribution seems constrained over time by the phenology of its hosts. The large variation in climatic conditions between sampling years explains the decrease in phenological overlap between P. confusa and its hosts in 2018 and the 33.5% decrease in the number of butterfly larvae infected. At least in this study, P. confusa seems to favour A. urticae as host. While it parasitized nests of A. urticae and A. io equally, the proportion of larvae parasitized is significantly higher for A. urticae. At the landscape scale, P. confusa is almost exclusively found in vegetated open land and near deciduous forests, whereas artificial habitats are negatively correlated with the likelihood of a nest to be parasitized. The genetic analyses on 89 adult P. confusa and 87 adult A. urticae using CO1 and AFLP markers reveal a low genetic diversity in P. confusa and a lack of genetic structure in both species, at the scale of our sampling. Further genetic studies using high-resolution genomics tools will be required to better understand the population genetic structure of P. confusa, its biotic interactions with its hosts, and ultimately the stability and the functioning of natural ecosystems.

scholarly journals Genetic structure of Dicksonia sellowiana Hook. (Dicksoniaceae) reveals clinal distribution along the latitudinal gradient of the Atlantic Forest

2020 ◽  
Vol 34 (4) ◽  
pp. 712-719
Author(s):  
Bruna Saviatto Fagundes ◽  
Maria Augusta Poersch ◽  
Jaqueline dos Santos ◽  
André Luiz Gaglioti ◽  
Paulo Henrique Labiak ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Atlantic Forest ◽  
Latitudinal Gradient

scholarly journals Ecology and population genetics of the parasitoid Phobocampe confusa (Hymenoptera: Ichneumonidae) in relation to its hosts, Aglais species (Lepidoptera: Numphalidae)

2020 ◽  
Author(s):  
Hélène Audusseau ◽  
Gaspard Baudrin ◽  
Mark R. Shaw ◽  
Naomi L.P. Keehnen ◽  
Reto Schmucki ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Latitudinal Gradient ◽  
Biotic Interactions ◽  
Climatic Conditions ◽  
Butterfly Species ◽  
Natural Ecosystems ◽  
Key Species ◽  
Butterfly Larvae

AbstractThe biology of parasitoids in natural ecosystems remain very poorly studied, while they are key species for their functioning. Here we focused on Phobocampe confusa, a vanessines specialist, responsible for high mortality rates in very emblematic butterfly species in Europe (genus Aglais). We studied its ecology and genetic structure in connection with those of its host butterflies in Sweden. To this aim, we gathered data from 428 P. confusa individuals reared from 6094 butterfly larvae (of A. urticae, A. io and in two occasions of Araschnia levana) collected over two years (2017 and 2018) and 19 sites distributed along a 500 km latitudinal gradient. We found that P. confusa is widely distributed along the latitudinal gradient. Its distribution is constrained over time by the phenology of its hosts. The large variation in climatic conditions between sampling years explains the decrease in phenological overlap between P. confusa and its hosts in 2018 and the 33.5% decrease in the number of butterfly larvae infected. At least in this study, P. confusa seems to favour A. urticae as host: while it parasitized nests of A. urticae and A. io equally, the proportion of larvae is significantly higher for A. urticae. At the landscape scale, P. confusa is almost exclusively found in vegetated open land and near deciduous forests, whereas artificial habitats are negatively correlated with the likelihood of a nest to be parasitized. The genetic analyses on 89 adult P. confusa and 87 adult A. urticae using COI and AFLP markers reveal a low genetic diversity in P. confusa and a lack of population genetic structure in both species, at the scale of our sampling. Further genetic studies using high-resolution genomics tools will be required to better understand the population genetic structure of P. confusa, its biotic interactions with its hosts, and ultimately the stability and the functioning of natural ecosystems.

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