Genetic variation between geographic populations of the amphipods Gammarus zaddachi and G. salinus

1981 ◽  
Vol 64 (2) ◽  
pp. 105-115 ◽  
Author(s):  
H. -P. Bulnheim ◽  
A. Scholl
Keyword(s):  
Genetic Variation ◽  
Gammarus Zaddachi ◽  
Geographic Populations

Comparative assessment of the genetic variation in selectively bred generations from two geographic populations of ivory shell (Babylonia areolata )

2016 ◽  
Vol 48 (8) ◽  
pp. 4205-4218 ◽  
Author(s):  
Jingqiang Fu ◽  
Wengang Lü ◽  
Weidong Li ◽  
Minghui Shen ◽  
Xuan Luo ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Comparative Assessment ◽  
Babylonia Areolata ◽  
Geographic Populations

Extensive Genetic Variation in Mitochondrial DNA'S Among Geographic Populations of the Deer Mouse, Peromyscus maniculatus

Evolution ◽  
1983 ◽  
Vol 37 (1) ◽  
pp. 1 ◽  
Author(s):  
Robert A. Lansman ◽  
John C. Avise ◽  
Charles F. Aquadro ◽  
John F. Shapira ◽  
Susan W. Daniel
Keyword(s):  
Genetic Variation ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Geographic Populations

scholarly journals KERAGAMAN GENETIK, KEBUGARAN DAN INKOMPATIBILITAS REPRODUKSI Hemiptarsenus varicornis Girault (Hymenoptera: Eulophidae), PARASITOID LARVA Liriomyza huidobrensis (Diptera: Agromyzidae)

2011 ◽  
Vol 11 (1) ◽  
pp. 1-10
Author(s):  
Reflinaldon Reflinaldon ◽  
Damayanti Buchori ◽  
Dwinardi Aprianto
Keyword(s):  
Genetic Variation ◽  
Dna Polymerase ◽  
Random Amplified Polymorphic Dna ◽  
Similarity Coefficient ◽  
Chain Reaction ◽  
Rapd Pcr ◽  
Reproductive Incompatibility ◽  
Liriomyza Huidobrensis ◽  
Geographic Populations ◽  
Polymerase Chain

Several experiments have been conducted to study genetic variation, fitness and reproductive incompatibility of H. varicornis from different geographic populations.  Genetic variation from Pandai Sikek (PS), Alahan Panjang (AP) and Kayu Aro (KA) was analyzed by using random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) technique and the similarity of genetics measured using NTSys program. The fitness of female wasps such as longevity, fecundity and preoviposition was observed and then compared among those populations.  Incompatibility in reproduction was determined by accounting of reproductive compatibility (RC) index in crossing of intra and interpopulation both of PS and AP.  The results showed high genetic variation of H. varicornis among population from Alahan Panjang, Pandai Sikek and Kayu Aro with similarity coefficient of 30 to 70%.  The best fitness showed the female wasps from Kayu Aro that was significantly different (P= 0.00) in longevity (24.60 ± 6.4 days), fecundity (63.6 ± 28.6 eggs) and parasitization (53.60%) but not significantly different (P=0.07) in number of the first day eggs (1.1 ± 1.4 eggs). Crossing of AP and PS indicated incompatibility in reproduction among the population.

scholarly journals Mycelial Compatibility Groups and Microsatellite Markers Reveal Genetic Diversity Within and Among Populations of Sunflower Sclerotinia Sclerotiorum in China

2014 ◽  
Vol 3 (1) ◽  
pp. 21-31
Author(s):  
Yujie Wang ◽  
Yaguang Hou ◽  
Haoyu Bo ◽  
Hongyou Zhou ◽  
Lan Jing ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Microsatellite Markers ◽  
Sclerotinia Sclerotiorum ◽  
Inner Mongolia ◽  
Test Results ◽  
Marker Data ◽  
Microsatellite Haplotype ◽  
Mycelial Compatibility ◽  
Geographic Populations ◽  
Geographic Regions

The genetic variability and differentiation among 101 sunflower Sclerotinia sclerotiorum isolates collected from four different geographic regions of China were analyzed using mycelial compatibility groupings (MCGs) and microsatellite markers. Twenty three MCGs were identified among all tested isolates. The majority of isolates collected from the same region were grouped in to the same MCGs, indicating less genetic variation of S. sclerotiorum within the same region. But there still have exceptions for some isolates. Also microsatellite marker data revealed that all tested isolates from four geographic populations could be divided into three distinct clusters, isolates from Inner Mongolia and Ninxia regions formed cluster I, isolates from Heilongjiang and Xinjiang formed separate clusters II and III . The percentage of variance within and among different geographic populations was 84.54% and 15.46% respectively and both variances were significantly different from each other (p0.01). Meanwhile, association between the microsatellite haplotype and MCGs was observed but not so significant; majority isolates from the same MCG showed the same haplotype, but certain samples showed different haplotypes, although they belonged to the same MCG. Based on the virulence test results, we also found that MCGs not only represent the genetic variation of tested isolates, but also reflect their pathogenic ability to a certain extent.

scholarly journals Genetic differentiation and diversity of Callosobruchus chinensis collections from China

2015 ◽  
Vol 106 (1) ◽  
pp. 124-134 ◽  
Author(s):  
C.X. Duan ◽  
W.C. Li ◽  
Z.D. Zhu ◽  
D.D. Li ◽  
S.L. Sun ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Genetic Differentiation ◽  
Genetic Distances ◽  
Fixation Index ◽  
Group Method ◽  
Callosobruchus Chinensis ◽  
Chain Reactions ◽  
Information Index ◽  
Geographic Populations

AbstractCallosobruchus chinensis (Linnaeus) is one of the most destructive pests of leguminous seeds. Genetic differentiation and diversity analysis of 345 C. chinensis individuals from 23 geographic populations using 20 polymorphic simple sequence repeats revealed a total of 149 alleles with an average of 7.45 alleles per locus. The average Shannon's information index was 1.015. The gene flow and genetic differentiation rate values at the 20 loci ranged from 0.201 to 1.841 and 11.0–47.2%, with averages of 0.849 and 24.4%, respectively. In the 23 geographic populations, the effective number of alleles and observed heterozygosity ranged from 1.441 to 2.218 and 0.191–0.410, respectively. Shannon's information index ranged from 0.357 to 0.949, with the highest value in Hohhot and the lowest in Rudong. In all comparisons, the fixation index (FST) values ranged from 0.049 to 0.441 with a total FST value of 0.254 among the 23 C. chinensis populations, indicating a moderate level of genetic differentiation and gene flow among these populations. Analysis of molecular variance revealed that the genetic variation within populations accounted for 76.7% of the total genetic variation. The genetic similarity values between populations varied from 0.617 to 0.969, whereas genetic distances varied from 0.032 to 0.483. Using unweighted pair-group method using arithmetical averages cluster analysis, the 23 geographic collections were classified into four distinct genetic groups but most of them were clustered into a single group. The pattern of the three concentrated groups from polymerase chain reactions analysis showed a somewhat different result with cluster.

scholarly journals Genetic Analysis of Needle Morphological and Anatomical Traits among Nature Populations of Pinus Tabuliformis

2017 ◽  
Vol 6 (1) ◽  
pp. 62
Author(s):  
Mei Zhang ◽  
Jing-Xiang Meng ◽  
Zi-Jie Zhang ◽  
Song-Lin Zhu ◽  
Yue Li
Keyword(s):  
Genetic Variation ◽  
Geographic Variation ◽  
Stomatal Density ◽  
Common Garden ◽  
Central China ◽  
Ecological Studies ◽  
Coniferous Species ◽  
Pinus Tabuliformis ◽  
Geographic Populations ◽  
Resin Canals

The morphological and anatomical traits of needles are important to evaluate geographic variation and population dynamics of conifer species. Variations of morphological and anatomical needle traits in coniferous species are considered to be the consequence of genetic evolution, and be used in geographic variation and ecological studies, etc. Pinus tabuliformis is a particular native coniferous species in northern and central China. For understanding its adaptive evolution in needle traits, the needle samplings of 10 geographic populations were collected from a 30yr provenience common garden trail that might eliminate site environment effect and show genetic variation among populations and 20 needle morphological and anatomical traits were involved. The results showed that variations among and within populations were significantly different over all the measured traits and the variance components within population were generally higher than that among populations in the most measured needle traits. Population heritabilities in all measured traits were higher than 0.7 in common garden sampling among populations. Needle traits were more significantly correlated with longitude than other factors. First five principal components accounted for 81.6% of the variation with eigenvalues greater than 1; the differences among populations were mainly dependent on needle width, stomatal density, section areas of vascular bundle, total resin canals, and mesophyll, as well as area ratio traits. Ten populations were divided into two categories by Euclidean distance. Variations in needle traits among the populations have shown systematic microevolution in terms of geographic impact on P. tabuliformis. This study would provide empirical data to characterize adaptation and genetic variation of P. tabuliformis, which should be more available for ecological studies.

scholarly journals EXTENSIVE GENETIC VARIATION IN MITOCHONDRIAL DNA'S AMONG GEOGRAPHIC POPULATIONS OF THE DEER MOUSE, PEROMYSCUS MANICULATUS

Evolution ◽  
1983 ◽  
Vol 37 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Robert A. Lansman ◽  
John C. Avise ◽  
Charles F. Aquadro ◽  
John F. Shapira ◽  
Susan W. Daniel
Keyword(s):  
Genetic Variation ◽  
Peromyscus Maniculatus ◽  
Deer Mouse ◽  
Geographic Populations
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