Isolation and selection of nitrite metabolising bacteria from the bottom mud of lobster culture area in Xuan Dai bay, Phu Yen province

The study had isolated and selected groups of bacteria that metabolise nitrite from the bottom mud of lobster cages in Xuan Dai bay, Phu Yen province. Analysis results from 21 sludge samples taken from 11 cages of lobster farming area isolated 16 strains of bacteria capable of nitrite metabolism. After investigating biological characteristics and nitrite metabolism of bacteria strains, 10 strains of bacteria were collected with the ability to metabolise nitrite over 95% in 72 hours. In addition, 10 strains of bacteria with the highest NO2- treatment efficiency, identified by genetic analysis and looked up on BLAST, defined as Stenotrophomonas pavanii, Chryseobacterium gleum, Stenotrophomonas maltophilia, Delftia lacustris, Acinetobacter junii

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WINTER WHEAT DEVELOPED BY THE UDMURT RESEARCH INSTITUTE OF AGRICULTURE IN COMPETITIVE VARIETY TESTING

Izvestiâ Timirâzevskoj selʹskohozâjstvennoj akademii ◽

10.26897/0021-342x-2020-3-5-16 ◽

2020 ◽

pp. 5-16

Author(s):

I.V. TORBINA ◽

◽

I.R. FARDEYEVA ◽

Keyword(s):

Winter Wheat ◽

Crop Rotation ◽

Biological Characteristics ◽

Commercial Use ◽

Breeding Material ◽

Rotation Pattern ◽

Selection Of ◽

Variety Testing ◽

Made In ◽

Research Institute

The paper assesses the promising varieties of winter wheat in a competitive variety test by the main economic and biological characteristics that determine the suitability of the variety for commercial use. The object of research was the authors’ own breeding material. The experiments on the selection of winter wheat were made in the experimental crop rotation pattern of the Institute.

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THE SELECTION OF S. CEREVISIAE MUTANTS DEFECTIVE IN THE START EVENT OF CELL DIVISION

Genetics ◽

10.1093/genetics/95.3.561 ◽

1980 ◽

Vol 95 (3) ◽

pp. 561-577 ◽

Cited By ~ 4

Author(s):

Steven I Reed

Keyword(s):

Cell Division ◽

Genetic Analysis ◽

Linkage Map ◽

Nuclear Genes ◽

Temperature Sensitive ◽

Restrictive Temperature ◽

Mating Pheromone ◽

Preliminary Characterization ◽

Complementation Groups ◽

Selection Of

ABSTRACT Thirty-three temperature-sensitive mutations defective in the start event of the cell division cycle of Saccharomyces cereuisiae were isolated and subjected to preliminary characterization. Complementation studies assigned these mutations to four complementation groups, one of which, cdc28, has been described previously. Genetic analysis revealed that these complementation groups define single nuclear genes, unlinked to one another. One of the three newly identified genes, cdc37, has been located in the yeast linkage map on chromosome IV, two meiotic map units distal to hom2.—Each mutation produces stage-specific arrest of cell division at start, the same point where mating pheromone interrupts division. After synchronization at start by incubation at the restrictive temperature, the mutants retain the capacity to enlarge and to conjugate.

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Biological characteristics and genomic analysis of a Stenotrophomonas maltophilia phage vB_SmaS_BUCT548

Virus Genes ◽

10.1007/s11262-020-01818-5 ◽

2021 ◽

Author(s):

Wenjing Zhang ◽

Rongrong Zhang ◽

Yunjia Hu ◽

Yujie Liu ◽

Liqin Wang ◽

...

Keyword(s):

Stenotrophomonas Maltophilia ◽

Genomic Analysis ◽

Biological Characteristics

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Immunization with a Live, Attenuated Simian Immunodeficiency Virus Vaccine Leads to Restriction of Viral Diversity in Rhesus Macaques Not Protected from Pathogenic Challenge

Journal of Virology ◽

10.1128/jvi.73.5.4443-4446.1999 ◽

1999 ◽

Vol 73 (5) ◽

pp. 4443-4446 ◽

Cited By ~ 5

Author(s):

Donald L. Sodora ◽

Kristine E. Sheridan ◽

Preston A. Marx ◽

Ruth I. Connor

Keyword(s):

Genetic Diversity ◽

Simian Immunodeficiency Virus ◽

Virus Vaccine ◽

Rhesus Macaques ◽

Biological Characteristics ◽

Viral Diversity ◽

Immunodeficiency Virus ◽

Sivmac251 Challenge ◽

Selection Of

ABSTRACT Rhesus macaques immunized with simian immunodeficiency virus SIVmac239Δnef but not protected from SIVmac251 challenge were studied to determine the genetic and biological characteristics of the breakthrough viruses. Assessment of SIV genetic diversity (env V1-V2) revealed a reduction in the number of viral species in the immunized, unprotected macaques, compared to the number in nonimmunized controls. However, no evidence for selection of a specific V1-V2 genotype was observed, and biologically cloned isolates from the animals with breakthrough virus were similar with respect to replication kinetics and coreceptor use in vitro.

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Assessment of Agricultural Valuable Indicators of Pure Lines of Tomato

Bulletin of Science and Practice ◽

10.33619/2414-2948/70/13 ◽

2021 ◽

Vol 7 (9) ◽

pp. 125-129

Author(s):

M. Adigozalov

Keyword(s):

Abiotic Factors ◽

Fruit Weight ◽

Biological Characteristics ◽

Starting Material ◽

Individual Selection ◽

Ripening Time ◽

Characteristic Features ◽

Pure Lines ◽

Selection Of ◽

Research Institute

The article is devoted to the study of several tomatoes introduced and created in Vegetable Growing Research Institute (Baku) and pure lines derived from them. Biological and economically-valuable characteristics of varieties and obtained pure are given. It should be noted that in Azerbaijan, 25 different varieties of tomatoes are introduced and localized. These varieties have been cultivated on farms for years and have lost their farm valuable qualities due to various biotic an abiotic factors. Although tomato is a self-pollinating plant, special selection and seeding measures are required for reproduction. Therefore, in order to restore the original characteristics of regionalized tomato varieties, it is necessary to re-study their biological characteristics and economically-valuable qualities. Our research was carried out in the direction of individual selection and acquisition of pure lines of typical plants with characteristic features and characteristics. In the course of the work, 2–3 best pure lines were separated from each variety. These lines differ from the parent varieties in terms of ripening time, fruit weight and productivity. Thus, as a result of experiments, it was determined that they give the product in 10–15 days, the characteristics of coexistence are also high, forming uniformity in shape, size and color. The obtained lines are promising, will be included in the selection of seed work as a valuable starting material, and will also be increased.

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Novel Mechanisms of Efflux-Mediated Levofloxacin Resistance and Reduced Amikacin Susceptibility in Stenotrophomonas maltophilia

Antimicrobial Agents and Chemotherapy ◽

10.1128/aac.01284-20 ◽

2020 ◽

Vol 65 (1) ◽

pp. e01284-20

Author(s):

Punyawee Dulyayangkul ◽

Karina Calvopiña ◽

Kate J. Heesom ◽

Matthew B. Avison

Keyword(s):

Abc Transporter ◽

Abc Transporters ◽

Stenotrophomonas Maltophilia ◽

Efflux Pump ◽

Regulatory System ◽

Fluoroquinolone Resistance ◽

Content Type ◽

Antimicrobial Drug Resistance ◽

Regulatory Systems ◽

Selection Of

ABSTRACTFluoroquinolone resistance in Stenotrophomonas maltophilia is multifactorial, but the most significant factor is overproduction of efflux pumps, particularly SmeDEF, following mutation. Here, we report that mutations in the glycosyl transferase gene smlt0622 in S. maltophilia K279a mutant K M6 cause constitutive activation of SmeDEF production, leading to elevated levofloxacin MIC. Selection of a levofloxacin-resistant K M6 derivative, K M6 LEVr, allowed identification of a novel two-component regulatory system, Smlt2645/6 (renamed SmaRS). The sensor kinase Smlt2646 (SmaS) is activated by mutation in K M6 LEVr causing overproduction of two novel ABC transporters and the known aminoglycoside efflux pump SmeYZ. Overproduction of one ABC transporter, Smlt1651-4 (renamed SmaCDEF), causes levofloxacin resistance in K M6 LEVr. Overproduction of the other ABC transporter, Smlt2642/3 (renamed SmaAB), and SmeYZ both contribute to the elevated amikacin MIC against K M6 LEVr. Accordingly, we have identified two novel ABC transporters associated with antimicrobial drug resistance in S. maltophilia and two novel regulatory systems whose mutation causes resistance to levofloxacin, clinically important as a promising drug for monotherapy against this highly resistant pathogen.

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Genetic analysis of complex traits via Bayesian variable selection: the utility of a mixture of uniform priors

Genetics Research ◽

10.1017/s0016672311000164 ◽

2011 ◽

Vol 93 (4) ◽

pp. 303-318 ◽

Cited By ~ 12

Author(s):

TIMO KNÜRR ◽

ESA LÄÄRÄ ◽

MIKKO J. SILLANPÄÄ

Keyword(s):

Genetic Analysis ◽

Variable Selection ◽

Complex Traits ◽

Bayesian Variable Selection ◽

Stochastic Search Variable Selection ◽

Indicator Variables ◽

Supplementary Material ◽

Selection Of ◽

Made In ◽

Search Variable

SummaryA new estimation-based Bayesian variable selection approach is presented for genetic analysis of complex traits based on linear or logistic regression. By assigning a mixture of uniform priors (MU) to genetic effects, the approach provides an intuitive way of specifying hyperparameters controlling the selection of multiple influential loci. It aims at avoiding the difficulty of interpreting assumptions made in the specifications of priors. The method is compared in two real datasets with two other approaches, stochastic search variable selection (SSVS) and a re-formulation of Bayes B utilizing indicator variables and adaptive Student's t-distributions (IAt). The Markov Chain Monte Carlo (MCMC) sampling performance of the three methods is evaluated using the publicly available software OpenBUGS (model scripts are provided in the Supplementary material). The sensitivity of MU to the specification of hyperparameters is assessed in one of the data examples.

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The Dawn of the Age of Multi-Parent MAGIC Populations in Plant Breeding: Novel Powerful Next-Generation Resources for Genetic Analysis and Selection of Recombinant Elite Material

Biology ◽

10.3390/biology9080229 ◽

2020 ◽

Vol 9 (8) ◽

pp. 229 ◽

Cited By ~ 1

Author(s):

Andrea Arrones ◽

Santiago Vilanova ◽

Mariola Plazas ◽

Giulio Mangino ◽

Laura Pascual ◽

...

Keyword(s):

Genetic Analysis ◽

Plant Breeding ◽

Complex Traits ◽

Genetic Recombination ◽

Phenotypic Diversity ◽

Recombinant Inbred Lines ◽

Plant Genetic Resources ◽

Diallel Cross ◽

Genetic Mosaic ◽

Selection Of

The compelling need to increase global agricultural production requires new breeding approaches that facilitate exploiting the diversity available in the plant genetic resources. Multi-parent advanced generation inter-cross (MAGIC) populations are large sets of recombinant inbred lines (RILs) that are a genetic mosaic of multiple founder parents. MAGIC populations display emerging features over experimental bi-parental and germplasm populations in combining significant levels of genetic recombination, a lack of genetic structure, and high genetic and phenotypic diversity. The development of MAGIC populations can be performed using “funnel” or “diallel” cross-designs, which are of great relevance choosing appropriate parents and defining optimal population sizes. Significant advances in specific software development are facilitating the genetic analysis of the complex genetic constitutions of MAGIC populations. Despite the complexity and the resources required in their development, due to their potential and interest for breeding, the number of MAGIC populations available and under development is continuously growing, with 45 MAGIC populations in different crops being reported here. Though cereals are by far the crop group where more MAGIC populations have been developed, MAGIC populations have also started to become available in other crop groups. The results obtained so far demonstrate that MAGIC populations are a very powerful tool for the dissection of complex traits, as well as a resource for the selection of recombinant elite breeding material and cultivars. In addition, some new MAGIC approaches that can make significant contributions to breeding, such as the development of inter-specific MAGIC populations, the development of MAGIC-like populations in crops where pure lines are not available, and the establishment of strategies for the straightforward incorporation of MAGIC materials in breeding pipelines, have barely been explored. The evidence that is already available indicates that MAGIC populations will play a major role in the coming years in allowing for impressive gains in plant breeding for developing new generations of dramatically improved cultivars.

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