The linkage map of the second chromosome of the tomato

1972 ◽  
Vol 50 (1) ◽  
pp. 109-119
Author(s):  
L. Butler
Keyword(s):  
Linkage Map ◽  
Gene Order ◽  
Reference Point ◽  
Nearest Neighbor ◽  
The Other ◽  
Relative Order ◽  
Chromosome 2 ◽  
Chromosome Map ◽  
Uniform Background ◽  
Linkage Relationships

The map of chromosome 2 has been brought up to date and 33 genes are located. Three-point crosses indicate that the gene order is s ms10wv Wo Me o dil aw (v2op suf) p d m dv, with the relative order of the three genes in parentheses still to be determined. Multiple two-point crosses are reported for the other 18 genes whose linkage relationships to d, aw, and their nearest neighbor are discussed. This permits the construction of a map for these genes placing the 33 mutants in relation to the centromere. The gene dd seems to be wrongly located.The heterogeneity of some recombination values and the paucity of close linkages in the central portion of the chromosome reveal a number of problems which should be investigated. The chromosome map which has been largely constructed from material with a uniform background forms a reference point for investigating the effect of asynapsis and inversions.

scholarly journals Secondary Trisomics and Telotrisomics of Rice: Origin, Characterization, and Use in Determining the Orientation of Chromosome Map

Genetics ◽  
1996 ◽  
Vol 143 (1) ◽  
pp. 517-529
Author(s):  
Kuldeep Singh ◽  
D S Multani ◽  
Gurdev S Khush
Keyword(s):  
Linkage Map ◽  
Large Population ◽  
Marker Genes ◽  
Linkage Groups ◽  
Breeding Behavior ◽  
Specific Chromosome ◽  
Chromosome Map ◽  
Primary Trisomics ◽  
Correct Orientation ◽  
Genetic Segregation

Abstract Secondary trisomics and telotrisomics representing the 12 chromosomes of rice were isolated from the progenies of primary trisomics. A large population of each primary trisomic was grown. Plants showing variation in gross morphology compared to the primary trisomics and disomic sibs were selected and analyzed cytologically at diakinesis and pachytene. Secondary trisomics for both arms of chromosomes 1, 2, 6, 7 and 11 and for one arm of chromosomes 4, 5, 8, 9 and 12 were identified. Telotrisomics for short arm of chromosomes 1, 8, 9 and 10 and for long arms of chromosomes 2, 3 and 5 were isolated. These secondary and telotrisomics were characterized morphologically and for breeding behavior. Secondary trisomics 2n + 1S · 1S, 2n + 1L · 1L, 2n + 2S · 2S, 2n + 2L · 2L, 2n + 6S · 6S, 2n + 6L · 6L and 2n + 7L · 7L are highly sterile, and 2n + 1L · 1L, 2n + 2L · 2L and 2n + 7L · 7L do not set any seed even upon backcrossing. Telotrisomics are fertile and vigorous. Genetic segregation of 43 marker genes was studied in the F2 or backcross progenies. On the basis of segregation data, these genes were delimited to specific chromosome arms. Correct orientation of 10 linkage groups was determined and centromere positions on nine linkage groups were approximated. A revised linkage map of rice is presented.

scholarly journals Epistatic Control of Non-Mendelian Inheritance in Mouse Interspecific Crosses

Genetics ◽  
1996 ◽  
Vol 143 (4) ◽  
pp. 1739-1752 ◽  
Author(s):  
Xavier Montagutelli ◽  
Rowena Turner ◽  
Joseph H Nadeau
Keyword(s):  
X Chromosome ◽  
Genetic Basis ◽  
Mendelian Inheritance ◽  
The Other ◽  
Interspecific Crosses ◽  
Chromosome 2 ◽  
Mus Spretus ◽  
F1 Hybrid ◽  
Strong Deviation ◽  
Marker Loci

Abstract Strong deviation of allele frequencies from Mendelian inheritance favoring Mus spretus-derived alleles has been described previously for X-linked loci in four mouse interspecific crosses. We reanalyzed data for three of these crosses focusing on the location of the gene(s) controlling deviation on the X chromosome and the genetic basis for incomplete deviation. At least two loci control deviation on the X chromosome, one near Xist (the candidate gene controlling X inactivation) and the other more centromerically located. In all three crosses, strong epistasis was found between loci near Xist and marker loci on the central portion of chromosome 2. The mechanism for this deviation from Mendelian expectations is not yet known but it is probably based on lethality of embryos carrying particular combinations of alleles rather than true segregation distortion during oogenesis in F1 hybrid females.

scholarly journals NEW MUTATIONS AND A 7-CHROMOSOME LINKAGE MAP OF SCHIZOPHYLLUM COMMUNE

Genetics ◽  
1977 ◽  
Vol 85 (3) ◽  
pp. 417-425
Author(s):  
Carl Frankel ◽  
Albert H Ellingboe
Keyword(s):  
Linkage Group ◽  
Linkage Map ◽  
Group Analysis ◽  
Schizophyllum Commune ◽  
Somatic Recombination ◽  
Linkage Relationships ◽  
New Mutations

ABSTRACT Forty-eight useful new mutations of S. commune were obtained by mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Their requirements and meiotic linkage relationships to each other and previously mapped areas were investigated. Several of these new mutations were incorporated into diploid strains so that the diploids contained at least one marker on every linkage group. Analysis of somatic recombination in these diploids indicated that each meiotic linkage group corresponded to an independent chromosome.

SOME EFFECTS ON FRUIT SIZE OF CHROMOSOME 2 OF THE TOMATO

1965 ◽  
Vol 43 (1) ◽  
pp. 137-146
Author(s):  
L. Butler
Keyword(s):  
Linkage Map ◽  
Fruit Size ◽  
Cell Number ◽  
Major Effect ◽  
Fruit Weight ◽  
Pleiotropic Effects ◽  
Chromosome 2 ◽  
Small Fruit ◽  
Number Of Cells

Fruit weights taken from two F2's of 1500 plants indicated that the genes d p o s Lc dil and suf all affect fruit weight. The recessive alleles, except suf and Lc, were associated with small fruit size. The data were analyzed to determine whether this association was the result of linkage or pleiotropic effects. The major effect occurred in the o region, which is some 44 units from the centromere of chromosome 2. The o gene makes the genes oval or pear-shaped instead of spherical, and it is shown that when the locule wall of a spherical fruit and an oval fruit are composed of the same number of cells, the spherical fruit is always heavier. Since cell number is the inherited unit of fruit size, then o is always associated with small size. A gene controlling number of locules, which affects fruit size, is also located in this section of the chromosome. The genes d and s, which are at opposite ends of the present linkage map, both appear to be linked with fruit size genes. It is suggested that these size genes lie in the hetero-chromatin which is adjacent to both ends of the linkage map. The genes dil and suf, which were produced by radiation of the same variety, appear to have pleiotropic effects on fruit size; suf increasing, and dil decreasing fruit size.

Effects of Light on Schooling and Feeding of Jack Mackerel, Trachurus symmetricus

1968 ◽  
Vol 25 (2) ◽  
pp. 393-407 ◽  
Author(s):  
John R. Hunter
Keyword(s):  
Motion Picture ◽  
Nearest Neighbor ◽  
Motion Pictures ◽  
Separation Distance ◽  
The Other ◽  
Angular Deviation ◽  
Jack Mackerel ◽  
A Value

Schools of six jack mackerel each were photographed with infrared film at eight levels of luminance and also in darkness. Three indices were used to measure the behavior of the school from motion pictures. Two of the indices, mean distance to nearest neighbor and mean separation distance, were measures of the distances between individuals in a school; the other, mean angular deviation, was a measure of differences in orientation between individuals. A value for each index was calculated for each motion picture frame.From 12.1 to 6 × 10−6 ft-L no differences existed in the angular deviation of the school or in the distances between fish. At 6 × 10−7 ft-L the intervals between fish were much larger than at higher levels of brightness and groups showed little uniformity in their orientation. Below 6 × 10−7 ft-L (darkness) schools were dispersed and the distributions of values of angular deviation were random.The ability of jack mackerel to feed on live adult Artemia was also tested at eight levels of luminance and in darkness. The number of Artemia eaten at 6 × 10−5 ft-L was about half of that eaten at the normal daytime level of 12.1 ft-L. Few Artemia were eaten at 6 × 10−7 ft-L and none in darkness.Comparison of these data with measurements of light in the sea indicated that jack mackerel probably would be able to maintain schools near the surface on a moonless starlit night and that they probably could feed effectively near the surface on a full moonlight night.

ABSENCE OF PHASE TRANSITIONS ON TREE STRUCTURES

1993 ◽  
Vol 07 (29n30) ◽  
pp. 1947-1950 ◽  
Author(s):  
RAFFAELLA BURIONI ◽  
DAVIDE CASSI
Keyword(s):  
Long Range ◽  
Nearest Neighbor ◽  
Linear Chain ◽  
Mean Field ◽  
Range Order ◽  
The Other ◽  
Long Range Order ◽  
Field Phase ◽  
Tree Structures ◽  
Bethe Lattices

We rigorously prove that the correlation functions of any statistical model having a compact transitive symmetry group and nearest-neighbor interactions on any tree structure are equal to the corresponding ones on a linear chain. The exponential decay of the latter implies the absence of long-range order on any tree. On the other hand, for trees with exponential growth such as Bethe lattices, one can show the existence of a particular kind of mean field phase transition without long-range order.

scholarly journals Albanian Aorist and Time Reference Points

2020 ◽  
Vol 10 (3) ◽  
pp. 115
Author(s):  
Muhamet Reçica ◽  
Naser Pajaziti
Keyword(s):  
Reference Point ◽  
Reference Points ◽  
The Other ◽  
Temporal Relations ◽  
Time Dimension ◽  
Relative Time ◽  
Absolute Time ◽  
Temporal System ◽  
The Absolute

Topics related to the structure of the temporal system of Albanian language always give opportunities for new discussions to deal with certain aspects related to various forms of this system, and one of them is the aorist, as a tense containing many semantic, temporal, aspectual, stylistic values, etc. The relationships that exist between the verbal tenses in this system within the absolute time-relative time dimension, which relate to the independent or dependent use of temporal forms against one another in different discoursing contexts, make up an interpretation-based approach to interest. Hence, the essential objective of this paper will be specifically the relations of the Albanian aorist to the other verbal forms, always observed with a time reference point, to illuminate the character of these purely temporal relations against each other under all circumstances of the actions that take place and are displayed by verbal forms in different contexts, relying on the corpus of examined materials.

scholarly journals AN IMPERIAL APOSTLE? ST PAUL, PROTESTANT CONVERSION, AND SOUTH ASIAN CHRISTIANITY

2017 ◽  
Vol 61 (1) ◽  
pp. 103-130
Author(s):  
SHINJINI DAS
Keyword(s):  
Nineteenth Century ◽  
South Asian ◽  
Reference Point ◽  
First Century ◽  
The Other ◽  
British Imperialism ◽  
Intellectual Engagement ◽  
Imperial Ideology ◽  
The One ◽  
The Ideal

AbstractThis article explores the locally specific (re)construction of a biblical figure, the Apostle St Paul, in India, to unravel the entanglement of religion with British imperial ideology on the one hand, and to understand the dynamics of colonial conversion on the other. Over the nineteenth century, evangelical pamphlets and periodicals heralded St Paul as the ideal missionary, who championed conversion to Christianity but within an imperial context: that of the first-century Roman Mediterranean. Through an examination of missionary discourses, along with a study of Indian (Hindu and Islamic) intellectual engagement with Christianity including Bengali convert narratives, this article studies St Paul as a reference point for understanding the contours of ‘vernacular Christianity’ in nineteenth-century India. Drawing upon colonial Christian publications mainly from Bengal, the article focuses on the multiple reconfigurations of Paul: as a crucial mascot of Anglican Protestantism, as a justification of British imperialism, as an ideological resource for anti-imperial sentiments, and as a theological inspiration for Hindu reform and revivalist organization.

Competition Law in Europe

2020 ◽  
pp. 103-114
Author(s):  
David J. Gerber
Keyword(s):  
Reference Point ◽  
Competition Law ◽  
Institutional Arrangements ◽  
The Other ◽  
Multiple Voices ◽  
The Us ◽  
National Boundaries ◽  
Substantive Law ◽  
European Competition Law

European competition law is the other central player in the competition law world, so an entire chapter is devoted to understanding how it works and how to deal with it. Virtually all firms operating beyond their own national boundaries need to pay attention to it, many regimes use it as a model and reference point, and its institutions have broad and often deep influence on many others. Some aspects of the substantive law are similar to US antitrust, but the similarities are sometimes misleading. For example, EU law uses economic analysis in ways that often differ from how it is used in the US. Procedural and institutional arrangements are often complicated. They represent multiple voices, as national and EU institutions function together to create, apply, and enforce competition law. The chapter reveals how this system functions and what factors guide decisions in it. It looks, in particular, at the institutional arrangements between the EU and its member states, including the role of the European Competition Network.

The CEPH consortium linkage map of human chromosome 2

Genomics ◽  
1992 ◽  
Vol 14 (4) ◽  
pp. 1055-1063 ◽  
Author(s):  
Nigel K. Spurr ◽  
Simon Cox ◽  
Stephen P. Bryant ◽  
John Attwood ◽  
Elizabeth B. Robson ◽  
...  
Keyword(s):  
Human Chromosome ◽  
Linkage Map ◽  
Chromosome 2
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