A CYTOGENETIC ANALYSIS OF THREE ASYNAPTIC MUTANTS IN BRASSICA CAMPESTRIS L.

1970 ◽  
Vol 12 (4) ◽  
pp. 743-749 ◽  
Author(s):  
G. R. Stringam
Keyword(s):  
Cytogenetic Analysis ◽  
Brassica Campestris ◽  
Genetic Data ◽  
Separate Gene ◽  
Chromosome Fragmentation ◽  
The Third ◽  
Cytological Abnormalities ◽  
Recessive Genes ◽  
Complete Failure

Genetic data on three asynaptic mutants showed that all are monogenically controlled by recessive genes. Differences in cytological abnormalities suggested that each mutant was controlled by a separate gene. The symbol, as, is proposed for these characters with the designations, as, as2, and as3.The degree of asynapsis varied from complete failure of pairing in two of the mutants to partial asynapsis in the third. Other aberrations, such as chromosome fragmentation, lagging, attenuated univalents, micronuclei, restitution nuclei, and aberrant sporad formation were observed. The value of these asynaptics in breeding and cytogenetic research is discussed.

INHERITANCE AND ALLELIC RELATIONSHIPS OF SEVEN CHLOROPHYLL-DEFICIENT MUTANTS IN BRASSICA CAMPESTRIS L.

1973 ◽  
Vol 15 (2) ◽  
pp. 335-339 ◽  
Author(s):  
Gary R. Stringam
Keyword(s):  
Plant Breeding ◽  
Brassica Campestris ◽  
Genetic Research ◽  
Genetic Data ◽  
Recessive Genes

Genetic data on seven chlorophyll-deficient mutants showed that all were independent monogenically-controlled recessive genes. The symbol yg is proposed for these characters with the designation yg-1 to yg-7. The value of these mutants in genetic research and in practical plant breeding problems is discussed.

Inheritance of siliqua strength in Brassica campestris L. I. Studies of F2 and backcross populations

1986 ◽  
Vol 28 (3) ◽  
pp. 365-373 ◽  
Author(s):  
G. P. Kadkol ◽  
G. M. Halloran ◽  
R. H. Macmillan
Keyword(s):  
Epistatic Interaction ◽  
Brassica Campestris ◽  
The Third ◽  
Backcross Populations ◽  
Siliqua Strength ◽  
Brown Sarson

The inheritance of siliqua strength was studied in Brassica campestris L. using F1, F2, and backcross generations of crosses between cv. Torch (shatter susceptible) and var. Yellow Sarson and var. Brown Sarson (shatter resistant) accessions. Shatter resistance (high siliqua strength) was recessive in all crosses. Crosses involving DS-17-D (var. Brown Sarson) indicated that siliqua strength is most likely controlled by two genes that show dominant epistatic interaction. Crosses of IB-5 and B-46 (both var. Yellow Sarson) each with cv. Torch indicated the likelihood of three genes controlling siliqua strength, two of which appeared to be epistatic over the third gene when dominant. In these crosses, the multivalve character appeared to be controlled by three genes, two of which were epistatic over the third gene resulting in multivalve character when the former two were recessive. Segregation for siliqua strength in the var. Yellow Sarson crosses was not independent of segregation for multivalve character.Key words: Brassica, siliqua strength, shatter resistance, Sarson.

scholarly journals Exploring Genetic Data Across Individuals Using Novel Comparative Report Tools (Preprint)

2018 ◽  
Author(s):  
Lauren Westendorf ◽  
Orit Shaer ◽  
Christina Pollalis ◽  
Clarissa Verish ◽  
Oded Nov ◽  
...  
Keyword(s):  
Family Members ◽  
Genomic Data ◽  
Genetic Data ◽  
Personal Genomics ◽  
Genomic Information ◽  
Genetic Characteristics ◽  
Personal Genomic ◽  
The Third ◽  
User Comprehension ◽  
Compare And Contrast

BACKGROUND The growth in the availability of personal genomic data to non-experts poses multiple challenges to Human-Computer Interaction (HCI) research: data are highly sensitive, complex, and have health implications for individuals and families. However, there has been little research on how non-expert users explore genomic data. Studies that investigated the information practices of personal genomic data users found that non-experts seek to contextualize and compare their personal data to others. The family-relevant nature of genetic data highlights the need for tools to enable non-experts to explore not only their own data, but to compare and contrast it with the data of others. OBJECTIVE We designed CrossGenomics, a novel tool for comparing personal genetic reports, which enables exploration of shared and unshared genetic variants among individuals. Focusing on communicating comparative impact, rarity, and certainty, we evaluated alternative novel interactive prototypes of this tool. In particular, we sought to: 1. asses to what extent are users able to comprehend both intra-individual and inter-individual information, and whether there are gaps between subjective and objective comprehension; 2. understand how people engage with a comparison tool for personal genomics, and what visualization type and features are most helpful for comprehension; 3. identify the needs of early adopters, people who share their genetic reports publicly, for comparing their genetic reports to others’. METHODS We conducted three online user studies. The first two studies employed a controlled experimental design to examine the effectiveness of different design interventions on user comprehension. In both studies, we applied between-subjects design with alternative views for comparing the personal genomic information of fictional family members. Participants were Amazon Mechanical Turk workers. Building on the two initial studies, the third user study evaluated a redesigned version of CrossGenomics 2.0, which combines multiple views. We recruited 49 participants, who are members of Open Humans and shared their genomic information publicly. Participants used the tool to compare their own personal genomic report to the report of four famous people. RESULTS Results from the first two studies highlight strengths of two visualization types and of particular features in enabling user comprehension of genomic data, and demonstrate the value of affording users the flexibility to examine the same report using multiple perspectives. Results from the third study emphasize users’ motivation and needs in comparison of genomic data. CONCLUSIONS The familial nature of personal genomic data highlights the need for tools to enable non-experts to explore not only their own data, but to compare and contrast their data with data of other biological family members, who share common genetic characteristics. The design and evaluation of CrossGenomics offer important insights into the design of future tools for personal genomics exploration and comparison.

A new species of Acanthodactylus Fitzinger, 1834 (Sauria: Lacertidae) from the Zagros Mountains, Iran

Zootaxa ◽  
2021 ◽  
Vol 5047 (1) ◽  
pp. 17-32
Author(s):  
OMID MOZAFFARI ◽  
SIMA MOHAMMADI ◽  
REIHANEH SABERI-PIROOZ ◽  
FARAHAM AHMADZADEH
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Genetic Data ◽  
Zagros Mountains ◽  
Widespread Species ◽  
The Third ◽  
Western Asia ◽  
Approaches To Study ◽  
A New Species ◽  
Iranian Populations

Acanthodactylus boskianus is a widespread species in Northern Africa and Western Asia. In this study, we used morphological and genetic approaches to study populations of A. boskianus from the Zagros Mountains in western Iran, the easternmost limit of the species’ distribution. Our morphological and genetic data indicate that populations of A. boskianus in Iran are distinct from other populations of A. boskianus. Therefore, we describe the Iranian populations as Acanthodactylus zagrosicus sp. nov. The new species is the third endemic species of Acanthodactylus in Iran and the ninth Acanthodactylus species distributed in Iran overall. According to our surveys, this species is distributed widely in the Zagros Mountains including Kermanshah, Lorestan, Ilam, and Khuzestan Provinces.  

scholarly journals Serbia's uncertainties in Kosmet

2002 ◽  
pp. 167-194
Author(s):  
Miodrag Rankovic
Keyword(s):  
Human Rights ◽  
The State ◽  
Entire Period ◽  
Institutional Framework ◽  
State Sovereignty ◽  
Left Wing ◽  
The Balkans ◽  
The Third ◽  
New Immigrants ◽  
Complete Failure

The paper consists of four sections: the situation immediately after the end of the NATO bombardment, Euro-American restructuring, main coordinates of state sovereignty and the results achieved so far within the so-called negotiating policy in Kosmet. The paper discusses the dilemma about the final outcome of the 1999 war, about the arrival of NATO to Kosmet, when the state of "the controlled chaos" really began. Serbia was left with the victims (2.500 dead) and material destruction (estimated damage of 12 to over 100 billion dollars) rapid impoverishment (over 600 thousand jobless) and over 300 thousand expelled. The first "external coordinate" of the Serbian statehood in Kosmet (reliance on the Russian-Chinese-Indian alliance) completely disappointed mostly because of further decrease in the Russian initiative in the Balkans the second "coordinate", support of the international public and left-wing groupations (illustrative example) was not enough to restrain American expansionism, while the third one, the achievement of national consensus about Kosmet was a complete failure - the Serbs remained divided both in Serbia and in Kosmet. Thus the entire period after the change of power in Serbia has been marked by yielding and concessions (Kouchner's institutional restructuring Haekkerup's "institutional framework", Steiner's decrees). There followed a planned "demographic cleansing" (influx of new immigrants from Albania, almost 200 thousand), further destruction of the monuments of Serbian spirituality false demilitarization ("the Kosovo Protection Corps"), installment of NATO bases, cleansing of non-Albanian settlements (over 40 thousand houses and about 300 schools burnt), continuation of terrorist activities, "underground economy" etc. Serbia now shares sovereignty with KFOR and with the organs of authority of the prevailing Albanians, all within the realm of "human rights" "multiethnic Kosovo" and Islamic-Turkish lobby.

Association of Genetic Variants with Colorectal Cancer in the Extended MENA Region: A Systematic Review

2020 ◽  
Vol 20 (4) ◽  
pp. 286-298 ◽  
Author(s):  
Mariem Sidenna ◽  
Reem Bux ◽  
Tasnim Fadl ◽  
Ugur Ozbek ◽  
Hatem Zayed
Keyword(s):  
Colorectal Cancer ◽  
Systematic Review ◽  
Web Of Science ◽  
Genetic Data ◽  
Search Method ◽  
Inclusion Criteria ◽  
Mena Region ◽  
The Third ◽  
Search Terms ◽  
Common Cancer

Background: Colorectal cancer (CRC) is the third most common cancer worldwide and the third leading cause of cancer-related death. It is a heterogeneous disease that develops through different genetic and epigenetic mechanisms. To date, no comprehensive systematic review investigating genetic risk factors for familial and sporadic CRC has been performed on the extended MENA (eMENA) region. Aims: This study aimed to systematically analyze genetic variations significantly associated with CRC in the eMENA region. Methods: We searched four literature databases (PubMed, Scopus, Science Direct, and Web of Science) from the time of inception until May 2019 using broad search terms to obtain all reported genetic data related to eMENA patients with CRC. Variants with an OR>1 that are associated with CRC were identified. Results: A total of 1,200 studies were obtained from our search method, 27 of which met the inclusion criteria for our systematic review, with a total of 8,230 CRC patients and 7,611 controls. Of these, 1,941 patients distributed throughout nine eMENA countries were found to carry 46 variants in 33 different genes. Interestingly, 19 variants were unique to CRC patients in the eMENA region. Interpretation: This is the first systematic review to capture the spectrum of variants significantly associated with CRC in the eMENA region. There appears to be a distinctive clinical picture for eMENA patients with CRC, and the range and distribution of variants among patients from the eMENA region differ from those noted in other ethnic groups.

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

Probe size and 5th-order aberration

1987 ◽  
Vol 45 ◽  
pp. 134-135 ◽  
Author(s):  
Zhifeng Shao
Keyword(s):  
Electron Probe ◽  
Spherical Aberration ◽  
Wave Length ◽  
Cylindrical Symmetry ◽  
Electron Wave ◽  
Third Order ◽  
The Third ◽  
Probe Radius ◽  
Small Probe ◽  
Probe Size

A small electron probe has many applications in many fields and in the case of the STEM, the probe size essentially determines the ultimate resolution. However, there are many difficulties in obtaining a very small probe.Spherical aberration is one of them and all existing probe forming systems have non-zero spherical aberration. The ultimate probe radius is given byδ = 0.43Csl/4ƛ3/4where ƛ is the electron wave length and it is apparent that δ decreases only slowly with decreasing Cs. Scherzer pointed out that the third order aberration coefficient always has the same sign regardless of the field distribution, provided only that the fields have cylindrical symmetry, are independent of time and no space charge is present. To overcome this problem, he proposed a corrector consisting of octupoles and quadrupoles.

Sign in / Sign up

Export Citation Format

Share Document