Comparative analysis of spatial genetic structures in sympatric populations of two riparian plants, Saxifraga acerifolia and Saxifraga fortunei

2021 ◽  
Author(s):  
Kana Magota ◽  
Shota Sakaguchi ◽  
Shun K. Hirota ◽  
Yoshihiro Tsunamoto ◽  
Yoshihisa Suyama ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Sympatric Populations ◽  
Riparian Plants ◽  
Genetic Structures

Comparative analysis of genetic structures and aggressiveness of Fusarium pseudograminearum populations from two surveys undertaken in 2008 and 2015 at two sites in the wheat belt of Western Australia

2019 ◽  
Vol 68 (7) ◽  
pp. 1337-1349 ◽  
Author(s):  
M. Khudhair ◽  
L. F. Thatcher ◽  
D. M. Gardiner ◽  
K. Kazan ◽  
M. M. Roper ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Western Australia ◽  
Fusarium Pseudograminearum ◽  
Genetic Structures

Genetic structures of allopatric and sympatric populations in Pseudorasbora pumila pumila and Pseudorasbora parva

2005 ◽  
Vol 52 (3) ◽  
pp. 243-250 ◽  
Author(s):  
Kazuto Koga ◽  
Akira Goto
Keyword(s):  
Pseudorasbora Parva ◽  
Sympatric Populations ◽  
Genetic Structures

Forest fragmentation and edge effects on the genetic structure ofClusia sphaerocarpaandC. lechleri(Clusiaceae) in tropical montane forests

2013 ◽  
Vol 29 (4) ◽  
pp. 321-329 ◽  
Author(s):  
Amira Apaza Quevedo ◽  
Matthias Schleuning ◽  
Isabell Hensen ◽  
Fransisco Saavedra ◽  
Walter Durka
Keyword(s):  
Genetic Structure ◽  
Edge Effects ◽  
Small Scale ◽  
Forest Fragments ◽  
Forest Edges ◽  
Sympatric Populations ◽  
Tropical Montane Forests ◽  
Genetic Level ◽  
Abiotic And Biotic Factors ◽  
Genetic Structures

Abstract:Fragmentation of tropical forests influences abiotic and biotic processes that affect the genetic structure of plant populations. In forest fragments, edge effects, i.e. changes of abiotic and biotic factors at forest edges, may be prevalent. In two forest fragments (c. 200 ha atc. 2450 m asl) of tropical montane forest in Bolivia, sympatric populations of the dioecious tree speciesClusia sphaerocarpaandC. lechleriwere used as case study species to compare genetic diversity and small-scale genetic structure (SGS) between edge and interior habitats. Eight microsatellite markers were employed to genotype 343 individuals including adults, juveniles and seedlings ofC. sphaerocarpaand 196 ofC. lechleri. Genetic differentiation was found between habitats in both species (ΦRT= 0.071 forC. sphaerocarpaand ΦRT= 0.028 forC. lechleri) and among ages inC. sphaerocarpa(ΦRT= 0.016). Overall, SGS was weak but significant with more pronounced SGS inC. lechleri(Sp= 0.0128) than inC. sphaerocarpa(Sp= 0.0073). However, positive spatial genetic autocorrelation extended only up to 10 m. ForC. sphaerocarpa, SGS was stronger in seedling and juvenile stages than in adults and in the forest interior than at forest edges. Our results show that edge effects can extend to the genetic level by breaking-up local genetic structures, probably due to increased gene flow and enhanced pollination and seed-dispersal interactions at forest edges.

scholarly journals THE PARTHENOGENETIC CAPACITIES AND GENETIC STRUCTURES OF SYMPATRIC POPULATIONS OF DROSOPHILA MERCATORUM AND DROSOPHILA HYDEI

Genetics ◽  
1979 ◽  
Vol 92 (4) ◽  
pp. 1283-1293
Author(s):  
Alan R Templeton
Keyword(s):  
Natural Populations ◽  
Population Increase ◽  
Sympatric Populations ◽  
Sexual Population ◽  
Garbage Dump ◽  
Drosophila Hydei ◽  
Drosophila Mercatorum ◽  
Hardy Weinberg Equilibrium ◽  
Genetic Structures ◽  
Low Rate

ABSTRACT Drosophila mercatorum is a sexual species that can reproduce parthenogenetically in the laboratory. A previous study showed that a natural population of D. mercatorum inhabiting the Kamuela garbage dump on the Island of Hawaii could produce both viable parthenogenetic adults and self-sustaining parthenogenetic lines. The present study deals with a second screen for parthenogenesis and an isozyme survey performed on natural populations of D. mercatorum and D. hydei caught in patches of Opuntia tuna about 10 kilometers from Kamuela. Both cactus-patch species produced viable partheno-genetic adults, but only D. mercatorum produced parthenogenetic females themselves capable of parthenogenesis. Moreover, D. mercatorum produced several "hot" lines characterized by high parthenogenetic rates, while all lines of D. hydei had a homogenous low rate. The parthenogenetic capacity of the cactus-patch D. mercaiorum was lower than that of the garbage-dump D. mercatorum. Moreover, both the cactus-patch D. mercatorum and D. hydei had lower levels of polymorphism (26% and 22%, respectively) then the garbage-dump D. mercatorum (44%), and both cactus-patch populations had heterozygote deficiencies with respect to Hardy-Weinberg equilibrium, unlike the garbage-dump population. Consequently, these data do not support the idea that decreased levels of heterozygosity in a sexual population increase the chance that sexual females will produce totally homozygous, parthenogenetic progeny.

1207: Failed Pyeloplasty in Children: Comparative Analysis of Retrograde Endopyelotomy VS. Re-do Pyeloplasty

2007 ◽  
Vol 177 (4S) ◽  
pp. 398-398
Author(s):  
Luis H. Braga ◽  
Joao L. Pippi Salle ◽  
Sumit Dave ◽  
Sean Skeldon ◽  
Armando J. Lorenzo ◽  
...  
Keyword(s):  
Comparative Analysis
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