The circular distribution of the willow warbler Phylloscopus trochilus around the Baltic Sea shares many features with the classic examples of ring species; however, the system is much younger. It ...has previously been shown that a secondary contact zone is located in central Scandinavia, where there are narrow clines for several morphological traits coincident with a migratory divide. Here we analyse multiple traits and genes from > 1700 males captured on breeding territories at 77 sites spread around the Baltic Sea to test the following hypothesis. If the secondary contact zone in Scandinavia is a result of divergence in two allopatric refuge populations during the last glaciation, we expect to find a similar secondary contact zone somewhere else around the circular distribution. Our results show that the trait clines were wider and displaced from each other along the eastern side of the Baltic Sea. Analyses of 12 microsatellite loci confirmed that the genome is very similar between the terminal forms (FST = 0). Two AFLP-derived markers filtered out from a genomic scan instead appear to be maintained by selection. These markers exhibited steep clines at the secondary contact zone in Scandinavia, but as for the phenotypic traits, had vastly different cline centres east of the Baltic Sea. The trait clines along the ring distribution outside the Scandinavian secondary contact zone thus seem to have been shaped by independent action of selection or drift during the process of postglacial colonization.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
O objetivo deste trabalho foi avaliar o efeito isolado ou simultâneo dos estresses hídrico e térmico na expressão gênica em nódulos de feijão-caupi. A bactéria Bradyrhizobium japonicum (estirpe BR ...3267) foi inoculada em sementes de feijão-caupi da cultivar IPA 206 e, 35 dias após a germinação, as plantas foram submetidas a diferentes regimes de disponibilidade hídrica e a estresse térmico, em casa de vegetação. Para a identificação dos genes diferencialmente expressos, foi utilizada a técnica de cDNA-AFLP, tendo-se isolado 67 fragmentos derivados de transcritos (FDTs) diferencialmente expressos. Após o sequenciamento dos FDTs e das análises de similaridade, com uso do programa Blastx, foram identificados 14 genes diferencialmente expressos envolvidos em diferentes processos metabólicos. O padrão de expressão de seis genes sob estresse abiótico foi confirmado por RT-qPCR, e observou-se indução de genes pertencentes a diferentes categorias funcionais, como biossíntese de ácido abscísico, sinalização celular, transportador de prolina e biossíntese de lipídeos de membranas. A expressão desses genes indica sua participação em processos relacionados à proteção dos nódulos ao estresse abiótico.
Objective: Liver diseases constitute a family of diseases in pregnancy which are less often studied individually. Spectrum of liver diseases directly or indirectly related to pregnancy comprise 3% of ...all pregnancies. The biggest challenge is to arrive at a diagnosis in such cases. With this study we aimed to study the prevalence of different Liver diseases in pregnancy in our population and its effect on fetomaternal outcome. Material and Methods: This was a prospective observational study carried out from March 2018 to March 2020. A total of 184 pregnant women with diagnosis of some form of liver disease as evident from their symptoms, signs or biochemical investigations were included in study cohort. Result: Primigravida accounted for majority of study cohort (44.02%). Approximately 90.21% belonged to 20-35 yrs. Age group. Intrahepatic cholestasis of pregnancy (IHCP) was the most common liver ailment (66.84%) followed by viral hepatitis (10.32%), Hyperemesis gravidarum (7.06%) and HELLP syndrome (6.52%). There was one case of Acute fatty liver of pregnancy (0.54%), four cases of Pre-eclampsia with liver dysfunction (2.17%), seven cases of Jaundice in pregnancy (3.80%) and 3 cases of pre-existing liver diseases (1.63%). 5 cases (2.71%) of antepartum eclampsia, 5 cases (2.71%) of postpartum eclampsia and 1 case (0.54%) of post-partum HELLP was seen. 33.33% patients were delivered early by induction or caesarean section because of liver dysfunction.14.67% required blood or blood products transfusion.1.63% had postpartum hemorrhage.1.08% mothers required intensive care admissions. Neonatal outcome was poor with 6.41% being growth restricted, 9.61% premature, 8.97% were intrauterine dead fetuses, 2.56% had early neonatal deaths and 7.05% needed neonatal intensive care unit admissions. Conclusion: Timely admission, quick diagnosis and appropriate management of patients with liver diseases in pregnancy can make a significant difference in mortality and morbidity rates due to liver ailments in pregnancy.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
Bearded irises are horticulturally important worldwide. Molecular assessment of the germplasms is helpful for their scientific utilization. In this study, forty bearded iris cultivars derived from
...Iris × germanica
L.,
I. variegata
L.,
I. pumila
L. and
I. pallida
Lam. were selected to characterize their genetic diversity and population structure using AFLP markers. 568 bands were generated, of which 479 (84.3%) were polymorphic. The genetic distances among accessions ranged from 0.20 to 1.09, with an average of 0.52. Six clusters could be obtained by cluster analysis, which was generally in accordance with the color performances of tepals. In PCoA analysis, the first two principal co–ordinates accounting for 17.49% and 13.75% of the total variation revealed closer relationships among
I. × germanica
,
I. variegata
and
I. pallida,
whereas
I. pumila
was further. Five sub-populations could be detected by structure analysis. The findings provide an insight into the germplasm innovation for bearded irises.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OBVAL, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Abstract This article sought to assess the genetic diversity within and between natural populations of Astrocaryum acaule by means of AFLP markers. Ninety individuals were sampled in three ...populations located in Manaus (state of Amazonas) across regions with different intensities of anthropogenic activity. Two clusters were differentiated by means of dendrograms and Bayesian cluster analysis, the first consisting of individuals from the Tarumã-Açu population in an intensely agricultural region, and the second, of populations from UFAM and Tupé conservation areas. The physical isolation of A. acaule populations has resulted in good conservation of its genetic identity, since anthropogenic activity is an important modifier of the genetic diversity of natural populations. Genetic diversity was higher within populations (74.58%) than between them (25.42%), which means that we have to collect representative samples from each of the genetically distinct groups for genetic conservation of the species. Therefore, in situ conservation is recommended.
Using Amplified Fragment Length Polymorphism (AFLP), we explored the intraspecific phylogeography of the alpine vascular plant Bupleurum stellatum (Apiaceae), disjunctly distributed in the Alps and ...Corsica. Within the Alps, the species' distribution area is also not contiguous, spatially isolated groups of populations occuring in the Dolomites (Italy) and the Montafon (Austria). A main goal of our study was to explore the degree of differentiation of the isolated populations in Corsica, the Dolomites and the Montafon from the populations in the main distributional area and to test for hypotheses of vicariance or dispersal. We also sought a better general knowledge of glacial refugia of low alpine silicicolous plants. Phenetic as well as cladistic analyses of the AFLP multilocus phenotypes reveal a substantial north-south split through the contiguous distribution area of B. stellatum in the Alps. The resulting phylogeographic groups can be related to glacial refugia in peripheral areas of the Alps that were recognised in previous studies. The disjunct populations in Corsica, the Dolomites and the Montafon, however, are less strongly differentiated. For example, the Corsican population clustered with high bootstrap support with populations from the Eastern Alps, suggesting immigration to Corsica from that region. Our study shows that deep phylogeographic splits resulting from old vicariance events can be concealed by presently contiguous distribution areas. In contrast, disjunctions, if they are due to dispersal events, need not be accompanied by genetic divergence.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NMLJ, NUK, OILJ, PNG, SAZU, SBCE, SBMB, UL, UM, UPUK
Barley (
Hordeum vulgare
L.), an important food and fodder crop, is potentially tolerant to salinity. To identify quantitative trait loci (QTLs) controlling salt tolerance, the population of 162 ...recombinant inbred lines (RILs) derived from F8 generation of Arigashar (an extremely salt tolerant Iranian six-rowed barley landrace) crossed with Igri (a salt semi-sensitive two-rowed cultivar) were evaluated. The growth of shoots, roots, and coleoptiles, and root numbers are four important growth characteristics severely affected by salt stress at seedling growth stages. A linkage map was constructed using 106 AFLP and SSR markers spanning six barley chromosomes including 2(2H), 3(3H), 4(4H), 7(5H), 6(6H), and 1(7H). Out of totally 26 detected QTLs, 17 QTLs were found effective for salt tolerance at 250 and 350 mM NaCl which localized on chromosomes 2H, 3H, 4H, 6H, 7H, and linkage group L1, whereas considering equivalent overlapped QTLs with a pleiotropic effect led to detection of totally 9 distinctive QTLs (
QClgH2.1b, QSdgH2.1b, QSlgH2.1c, QNrgH2.1b, QTwgH2.2c, QSdg3Hb, QSlg4Hb1, QClg4Hb
, and
QSlg6Hc2
) effective for salinity tolerance. 2(2H), 4(4H), and 6(6H) were major chromosomes harboring QTLs which effectively controlled salt tolerance in the Igri×Arigashar population. An interesting QTL
, QTwg4Hc
, was localized on chromosome 4H in the
XE41-M61
marker distance that controls several traits including shoot and coleoptile lengths and shoot fresh mass under salt stress. A dense marker cluster around a resistance gene could offer a starting point for positional cloning.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UL, UM, UPUK, VKSCE, ZAGLJ
ObjectiveTo understand the genetic diversity of Gleditsia sinensis. Method215 G. sinensis samples were analyzed using AFLP( amplified fragment length polymorphism) approach. ResultThe results showed ...that total of 1 782 loci of G. sinensis genome were examined for molecular variation in which 1 389 loci were polymorphism,accounting for 77. 94%. The average Shannon's and Nei's index were 0. 256 and 0. 168,respectively. At the species level,the total genetic diversity( Ht) was 0. 127,suggesting a lower genetic diversity in G. sinensis populations. The gene flow and average genetic distance were 0. 059 and 1. 483,respectively. It is suggested that there were some genetic differentiations among the ten populations. The UPGMA cluster analysis showed that the G.sinensis populations were divided four types. The variance within population was the main part of the genetic variation of the species according to the AMOVA and Gst analysis. ConclusionIn combination with on-site investigation,it is conclude that the
Abstract Background Cryptococcus gattii is a pathogenic basidiomycetous yeast that is emerging in temperate climate zones worldwide. C. gattii has repetitively been isolated from numerous tree ...species. Ongoing environmental sampling and molecular characterization is essential to understand the presence of this primary pathogenic microorganism in the Mediterranean environment. Aims To report the first isolation of the rare C. gattii genotype AFLP7/VGIV from the environment in Europe. Methods Samples were collected from woody debris of carob trees ( Ceratonia siliqua ) and olive trees ( Olea europaea ) in El Perelló, Tarragona, Spain. Cryptococcus species were further characterized by using URA5 -RFLP, MALDI-TOF, AFLP and MLST. The antifungal susceptibility profile to amphotericin B, 5-fluorocytosine, fluconazole, itraconazole, posaconazole and voriconazole was determined using Sensititre Yeast One and E-test. Results Cultures from one carob tree revealed the presence of ten Cryptococcus -like colonies. One colony was identified as C. gattii , and subsequent molecular characterization showed that it was an α mating-type that belonged to the rare genotype AFLP7/VGIV. Antifungal susceptibility testing showed values within the range of sensitivity described for other isolates of the same genotype and within the epidemiological cutoff values for this species. Conclusions The isolation of the rare C. gattii genotype AFLP7/VGIV in Spain is the first report in the European environment, implying the possible presence in other regions of the Mediterranean area, and underlines that clinicians must be aware for C. gattii infections in healthy individuals.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
There is an emerging consensus that the intent of most species concepts is to identify evolutionarily distinct lineages. However, the criteria used to identify lineages differ among concepts ...depending on the perceived importance of various attributes of evolving populations. We have examined five different species criteria to ask whether the three taxonomic varieties of Humulus lupulus (hops) native to North America are distinct lineages. Three criteria (monophyly, absence of genetic intermediates, and diagnosability) focus on evolutionary patterns and two (intrinsic reproductive isolation and niche specialization) consider evolutionary processes. Phylogenetic analysis of amplified fragment length polymorphism (AFLP) data under a relaxed molecular clock, a stochastic Dollo substitution model, and parsimony identified all varieties as monophyletic, thus they satisfy the monophyly criterion for species delimitation. Principal coordinate analysis and a Bayesian assignment procedure revealed deep genetic subdivisions and little admixture between varieties, indicating an absence of genetic intermediates and compliance with the genotypic cluster species criterion. Diagnostic morphological and AFLP characters were found for all varieties, thus they meet the diagnosability criterion. Natural history information suggests that reproductive isolating barriers may have evolved in var. pubescens, potentially qualifying it as a species under a criterion of intrinsic reproductive isolation. Environmental niche modeling showed that the preferred habitat of var. neomexicanus is climatically unique, suggesting niche specialization and thus compliance with an ecological species criterion. Isolation by distance coupled with imperfect sampling can lead to erroneous lineage identification using some species criteria. Compliance with complementary pattern- and process-oriented criteria provides powerful corroboration for a species hypothesis and mitigates the necessity for comprehensive sampling of the entire species range, a practical impossibility in many systems. We hypothesize that var. pubescens maintains its genetic identity, despite substantial niche overlap with var. lupuloides, via the evolution of partial reproductive isolating mechanisms. Variety neomexicanus, conversely, will likely persist as a distinct lineage, regardless of limited gene flow with vars. lupuloides and pubescens because of ecological isolation—adaptation to the unique conditions of the Rocky Mountain cordillera. Thus, we support recognition of vars. neomexicanus and pubescens as species, but delay making a recommendation for var. lupuloides until sampling of genetic variation is complete or a stable biological process can be identified to explain its observed genetic divergence.
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