Characterization of Growth Period Structure and Identification of E Genes of MGⅢ Soybean Varieties from Different Geographic Regions

2018 ◽  
Vol 44 (10) ◽  
pp. 1448
Author(s):  
Hong JIANG ◽  
Shi SUN ◽  
Wen-Wen SONG ◽  
Cun-Xiang WU ◽  
Ting-Ting WU ◽  
...  
Keyword(s):  
Growth Period ◽  
Geographic Regions

Microscopic Characterization of Frost Surface During Liquid-Ice Phase Change Period

2002 ◽  
Author(s):  
Y. L. Hao ◽  
J. Iragorry ◽  
D. Castro ◽  
Y.-X. Tao ◽  
S. Jia
Keyword(s):  
Surface Characterization ◽  
Microscopic Analysis ◽  
Growth Period ◽  
Interface Temperature ◽  
Test Technique ◽  
Video Microscope ◽  
The Mean ◽  
Change Period ◽  
Frost Layer

In response to the need for developing a better model to predict frost formation and defrosting processes in freezer and evaporator applications, a microscopic analysis of frost growth on a flat surface is conducted to determine the microscopic characteristics of a frost layer during the early growth period when sub-cooled droplets are formed and changed to the ice. The surface characterization is performed by employing the holographic interferometry technique to determine the air-frost interface temperature, and the video microscope to determine the mean droplet size and ice particle fractions. Typical experimental results are presented to demonstrate the test technique. Preliminary experimentally determined frost thickness and air-frost interface temperature are compared with simulation results.

scholarly journals Chemical Characterization of Dew Water Collected in Different Geographic Regions of Poland

Sensors ◽  
2008 ◽  
Vol 8 (6) ◽  
pp. 4006-4032 ◽  
Author(s):  
Żaneta Polkowska ◽  
Marek Błaś ◽  
Kamila Klimaszewska ◽  
Mieczysław Sobik ◽  
Stanisław Małek ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Geographic Regions ◽  
Dew Water

scholarly journals MORPHOPHYSIOLOGY OF RHIZOBIA ISOLATED FROM NATIVE FORAGE OF FABACEAE OF THE CAATINGA

2019 ◽  
Vol 32 (4) ◽  
pp. 904-914
Author(s):  
SUELANE DE MELO DIAS ◽  
ALBERÍCIO PEREIRA DE ANDRADE ◽  
ADAILSON PEREIRA DE SOUZA ◽  
ANDRÉ LUIZ RODRIGUES MAGALHÃES ◽  
RISELANE DE LUCENA ALCÂNTARA BRUNO ◽  
...  
Keyword(s):  
High Temperatures ◽  
Native Species ◽  
Growth Period ◽  
Semiarid Region ◽  
Ph Tolerance ◽  
Resistance To Stress ◽  
Macroptilium Atropurpureum ◽  
Physiological Tests ◽  
Exopolysaccharides Production

ABSTRACT The rhizobia found in Fabaceae plants of the Caatinga may have potential as fodder in the semiarid region, thus increasing the availability of feed for animal production in this region. This study aimed to characterize the morphophysiology of rhizobia strains of the forage species Mimosa tenuiflora (Jurema preta), Macroptilium atropurpureum (Siratro), and Desmanthus pernambucanus (Jureminha). The soil used as the substrate was collected at specific locations in the municipalities of Sertânia, Arcoverde, and São Bento do Una, state of Pernambuco. The characterization of rhizobial colonies included growth period, diameter, elevation, transparency, exopolysaccharides production, and color. In addition, salinity, temperature, and pH tolerance tests of the native rhizobia were conducted. Evaluation of cultures showed that the isolates formed colonies with flat elevation, moderate production of exopolysaccharides, coloration varying from cream to white, and a smooth surface. Physiological tests of abiotic stress resistance showed that the native species isolated from M. tenuiflora were more resistant when grown in soils from the municipality of Sertânia and isolates from M. atropurpureum and D. pernambucanus had high resistance to high temperatures, regardless of place of farming. It can be concluded that native rhizobia from the Semiarid region of Pernambuco show resistance to stress caused by high temperatures, salinity variation, and pH. These characteristics are influenced by soil and the botanical species in symbiosis with the rhizobia.

scholarly journals Molecular Characterization of International Collections of the Wheat Stripe Rust Pathogen Puccinia striiformis f. sp. tritici Reveals High Diversity and Intercontinental Migration

2020 ◽  
Vol 110 (4) ◽  
pp. 933-942 ◽  
Author(s):  
Dipak Sharma-Poudyal ◽  
Qing Bai ◽  
Anmin Wan ◽  
Meinan Wang ◽  
Deven See ◽  
...  
Keyword(s):  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Management Strategies ◽  
Global Scale ◽  
Asian Populations ◽  
Wheat Diseases ◽  
Geographic Regions ◽  
High Level

Puccinia striiformis f. sp. tritici causes stripe rust (yellow rust), one of the most important wheat diseases worldwide. To understand the genetic variation of the pathogen in a global scale, 283 P. striiformis f. sp. tritici isolates collected from 16 countries in eight geographic regions were genotyped using 24 codominant simple sequence repeat markers. The overall collection had a high level of genetic diversity, and the diversity levels in the Asian populations were generally higher than those of the other regions. Heterozygosity of isolates ranged from 0 to 75%, with an average of 46%. Mean heterozygosity in individual countries ranged from 34 to 59%. A total of 265 multilocus genotypes (MLGs) were detected, which were classified into eight molecular groups. Some of the molecular groups were present in all geographic regions. Moreover, many isolates from different regions were found to be identical or very closely related MLGs. Analysis of molecular variance revealed high variation within countries and intermediate variation between countries, but it revealed low and insignificant variation among geographic regions. Pairwise comparisons of regional populations detected considerable effective migrants and only low to moderate levels of differentiation. The molecular genotypes had a moderate level of correlation with the virulence phenotypes, and some of the molecular/virulence groups contained isolates from different continents. The results indicate tremendous migrations of P. striiformis f. sp. tritici and warrant the development of management strategies considering the global pathogen population.

Characterization of Two Growth Period QTLs Reveals Modification of PRR3 Genes During Soybean Domestication

2018 ◽  
Vol 60 (2) ◽  
pp. 407-420 ◽  
Author(s):  
Man-Wah Li ◽  
Wei Liu ◽  
Hon-Ming Lam ◽  
Joshua M Gendron
Keyword(s):  
Growth Period ◽  
Soybean Domestication

scholarly journals Characterization of resistance to the wheat stem sawfly in spring wheat landrace accessions from targeted geographic regions of the world

Euphytica ◽  
2017 ◽  
Vol 213 (7) ◽  
Author(s):  
Andrea C. Varella ◽  
David K. Weaver ◽  
Jason P. Cook ◽  
Nancy K. Blake ◽  
Megan L. Hofland ◽  
...  
Keyword(s):  
Spring Wheat ◽  
Wheat Stem Sawfly ◽  
Wheat Landrace ◽  
The World ◽  
Geographic Regions ◽  
Landrace Accessions

Molecular characterization of two opecoelid trematodes from fishes in the Gulf of Mexico, with a description of a new species of Helicometra

2014 ◽  
Vol 59 (3) ◽  
Author(s):  
Michael Andres ◽  
Candis Ray ◽  
Eric Pulis ◽  
Stephen Curran ◽  
Robin Overstreet
Keyword(s):  
Gulf Of Mexico ◽  
Mediterranean Sea ◽  
Sensu Stricto ◽  
Internal Transcribed Spacer Region ◽  
Rdna Sequences ◽  
New Material ◽  
Geographic Regions ◽  
The Mediterranean ◽  
A New Species

AbstractThe plagioporine opecoelids Helicometra fasciata (Rudolphi, 1819) Odhner, 1902, and Macvicaria crassigula (Linton, 1910) Bartoli, Bray, and Gibson, 1989 have been reported from fishes in expansive geographic regions, disjointed from their type localities. New material of M. crassigula was collected from near its type locality as well as specimens resembling Helicometra fasciata sensu lato from three triglids in the Gulf of Mexico. Comparisons of the ribosomal DNA (rDNA) sequences, comprising the partial 18S rDNA, internal transcribed spacer region (= ITS1, 5.8S, and ITS2), and partial 28S rDNA gene, from M. crassigula and Helicometra fasciata sensu lato in the Gulf of Mexico were made with sequences deposited in GenBank from those species from the Mediterranean Sea. Results reveal that M. crassigula sensu stricto from the Gulf of Mexico is distinct from the two cryptic species of M. crassigula sensu lato from the Mediterranean Sea and Helicometra fasciata sensu lato in this study differs from H. fasciata sequences from the Mediterranean Sea, thus Helicometra manteri sp. nov. is described.

scholarly journals Analysis of 2.1 million SARS-CoV-2 genomes identifies mutations associated with transmissibility

2021 ◽  
Author(s):  
Fritz Heinrich Obermeyer ◽  
Stephen F. Schaffner ◽  
Martin Jankowiak ◽  
Nikolaos Barkas ◽  
Jesse D. Pyle ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Logistic Regression Model ◽  
Multinomial Logistic Regression ◽  
Functional Characterization ◽  
Health Concern ◽  
Nonstructural Proteins ◽  
Multinomial Logistic Regression Model ◽  
Public Health Concern ◽  
Geographic Regions

Repeated emergence of SARS-CoV-2 variants with increased transmissibility necessitates rapid detection and characterization of new lineages. To address this need, we developed PyR0, a hierarchical Bayesian multinomial logistic regression model that infers relative transmissibility of all viral lineages across geographic regions, detects lineages increasing in prevalence, and identifies mutations relevant to transmissibility. Applying PyR0 to all publicly available SARS-CoV-2 genomes, we identify numerous substitutions that increase transmissibility, including previously identified spike mutations and many non-spike mutations within the nucleocapsid and nonstructural proteins. PyR0 forecasts growth of new lineages from their mutational profile, identifies viral lineages of concern as they emerge, and prioritizes mutations of biological and public health concern for functional characterization.

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