scholarly journals Fine localization of the sym31 locus in pea linkage group III

2012 ◽  
Vol 10 (1) ◽  
pp. 27-33
Author(s):  
Viktor E Tsyganov ◽  
Sergey M Rozov ◽  
Maggie Knox ◽  
Aleksey U Borisov ◽  
Tomas N Ellis ◽  
...  
Keyword(s):  
Linkage Group ◽  
Genetic Map ◽  
Morphological Markers ◽  
Group Iii ◽  
Fine Position ◽  
Fine Localization

 Analysis of joint inheritance of symbiotic locus sym31 and 12 molecular and morphological markers of pea linkage group III was performed. The linkage between symbiotic locus sym31 and 11 analyzed markers was observed. Using theAntMap software,adetailed genetic map of the sym31 locus was constructed and its fine position in linkage group III was determined.

The genetic and RFLP characterization of the left end of linkage group III in Caenorhabditis elegans

Genome ◽  
1993 ◽  
Vol 36 (4) ◽  
pp. 712-724 ◽  
Author(s):  
Dave Pilgrim
Keyword(s):  
Caenorhabditis Elegans ◽  
Linkage Group ◽  
Genetic Map ◽  
Physical Map ◽  
Group Iii ◽  
C Elegans ◽  
Genomic Regions ◽  
Caenorhabditis Elegans Genome ◽  
Selection Of

A genetic approach was taken to identify new transposable element Tc1 -dependent polymorphisms on the left end of linkage group III in the nematode Caenorhabditis elegans. The cloning of the genomic DNA surrounding the Tc1 allowed the selection of overlapping clones (from the collection being used to assemble the physical map of the C. elegans genome). A contig of approximately 600–800 kbp in the region has been identified, the genetic map of the region has been refined, and 10 new RFLPs as well as at least four previously characterized genetic loci have been positioned onto the physical map, to the resolution of a few cosmids. This analysis demonstrated the ability to combine physical and genetic mapping for the rapid analysis of large genomic regions (0.5–1 Mbp) in genetically amenable eukaryotes.Key words: Caenorhabditis elegans, genome analysis, RFLP, physical map, genetic map.

Fine localization of locus Sym31 in pea linkage group III

2013 ◽  
Vol 3 (2) ◽  
pp. 114-119
Author(s):  
V. E. Tsyganov ◽  
S. M. Rozov ◽  
M. Knox ◽  
A. Yu. Borisov ◽  
T. H. N. Ellis ◽  
...  
Keyword(s):  
Linkage Group ◽  
Group Iii ◽  
Fine Localization

SEX AND CROSSING OVER IN LINKAGE GROUP III OF TRIBOLIUM CASTANEUM

1977 ◽  
Vol 19 (2) ◽  
pp. 259-263 ◽  
Author(s):  
Alexander Sokoloff
Keyword(s):  
Sex Differences ◽  
Linkage Group ◽  
Tribolium Castaneum ◽  
Relative Position ◽  
Genetic Background ◽  
Crossing Over ◽  
Group Iii ◽  
The Third ◽  
Main Factors ◽  
Coleoptera Tenebrionidae

The relative position of the genes black (b), light ocular diaphragm (lod) and aureate (au) for the third linkage group of T. castaneum (Herbst) (Coleoptera, Tenebrionidae) has been determined as b – lod – au. The distances between the various genes vary, depending on the cross. The b++/+ lod au ♂ × + lod au/+ lod au ♀ crosses give the following recombination values: au – lod = 18.32 ± 1.21%; b – lod = 21.05 ± 1.51% and b – au = 37.43 ± 1.27%. The reciprocal crosses give au – lod = 27.67 ± 1.62%; b – lod = 13.97 ± 1.26% and b – au = 39.79 ± 1.78%. For the larger distances encompassed in the b – au region the recombination values in the two sexes were not significantly different. For the shorter b – lod region the recombination values were significantly larger in the females than in the males, while for the adjacent lod – au region the opposite was true. On the basis of the current literature it would appear that the main factors contributing to these sex differences in recombination are the modifiers which are different in the genetic background of the two sexes.

scholarly journals Centromere-Linkage Analysis and Consolidation of the Zebrafish Genetic Map

Genetics ◽  
1996 ◽  
Vol 142 (4) ◽  
pp. 1277-1288
Author(s):  
Stephen L Johnson ◽  
Michael A Gates ◽  
Michele Johnson ◽  
William S Talbot ◽  
Sally Horne ◽  
...  
Keyword(s):  
Linkage Group ◽  
Linkage Analysis ◽  
Genetic Analysis ◽  
Linkage Map ◽  
Rapid Method ◽  
Genetic Map ◽  
Dna Polymorphisms ◽  
Linkage Groups

Abstract The ease of isolating mutations in zebrafish will contribute to an understanding of a variety of processes common to all vertebrates. To facilitate genetic analysis of such mutations, we have identified DNA polymorphisms closely linked to each of the 25 centromeres of zebrafish, placed centromeres on the linkage map, increased the number of mapped PCR-based markers to 652, and consolidated the number of linkage groups to the number of chromosomes. This work makes possible centromere-linkage analysis, a novel, rapid method to assign mutations to a specific linkage group using half-tetrads.

Construction of a basic genetic map for alfalfa using RFLP, RAPD, isozyme and morphological markers

1993 ◽  
Vol 238-238 (1-2) ◽  
pp. 129-137 ◽  
Author(s):  
György B. Kiss ◽  
Gyula Csanádi ◽  
Katalin Kálmán ◽  
Péter Kaló ◽  
László Ökrész
Keyword(s):  
Genetic Map ◽  
Morphological Markers ◽  
Rflp Rapd

DOMINANT-AND-RECESSIVE EPISTASIS IN A HOMEOTIC MOSQUITO MUTANT

1976 ◽  
Vol 18 (4) ◽  
pp. 593-600
Author(s):  
Satish C. Bhalla
Keyword(s):  
Linkage Group ◽  
Wild Type ◽  
Pure Strain ◽  
Group Iii ◽  
Homeotic Mutant ◽  
Culex Pipiens Fatigans ◽  
Group I ◽  
Ratio Data ◽  
Independent Segregation ◽  
Selection For

Folowing selection for 15 generations a pure strain of a homeotic mutant spur was isolated from a Brazilian population of the mosquito Culex pipiens fatigans. Monohybrid crosses showed a 13:3 segregation indicating dominant-and-recessive epistasis for wild-type vs. spur. This implies that a dominant allele at one locus and a recessive at the other interact to produce the mutant phenotype. Dihybrid crosses with linkage group II markers yellow and ruby gave 39:13:9:3 ratios indicating independent segregation. However, the dihybrid cross with linkage group I marker maroon showed a highly significant departure from 39:13:9:3 ratio. Data available indicate that the phenotype spur is controlled by a dominant epistat in linkage group III and a recessive epistat (approximately 31.9 crossover units from maroon) in linkage group I.

scholarly journals A variegated position effect in Aspergillus nidulans

1970 ◽  
Vol 16 (3) ◽  
pp. 303-316 ◽  
Author(s):  
A. J. Clutterbuck
Keyword(s):  
Linkage Group ◽  
Aspergillus Nidulans ◽  
Position Effect ◽  
Attachment Site ◽  
Low Ph ◽  
Original Strain ◽  
Salt Medium ◽  
Group Viii ◽  
Distal Half ◽  
Group Iii

SUMMARYIn mutants at the ‘bristle’ locus of Aspergillus nidulans the conidiophore remains as a stiff hypha rather than developing a vesicle, sterigmata and conidia. The brlA 12 allele of this locus has a variegated phenotype, and genetic analysis has shown that this is associated with a translocation which has a breakpoint in the map interval adjacent to the bristle locus.The mutant phenotype is partially repaired on high-salt medium at low pH, and can also be repaired by suppressors, one of which has been mapped at a locus unlinked to brlA 12.The mutant provides proof that variegation is due to instability of gene expression and not to mutability since brlA 12 is genetically stable and can be propagated from either conidia or sterile conidiophores, the structures formed at the two extremes of variegation, and the resulting colonies in both cases are identical to the original strain.It has been shown by mitotic recombination that the translocation associated with the variegated mutant is a ‘simple translocation’ in which the distal half of linkage group VIII is attached to the end of linkage group III. This terminal attachment site does not appear to be damaged in any genetically detectable way.

LINKAGE OF A GENE FOR DDT–RESISTANCE IN ADULTS OF THE MOSQUITO AEDES AEGYPTI

1975 ◽  
Vol 17 (3) ◽  
pp. 311-322 ◽  
Author(s):  
Judith M. Hitchen ◽  
R. J. Wood
Keyword(s):  
Linkage Group ◽  
Aedes Aegypti ◽  
Group Iii ◽  
Ddt Resistance

The gene RDDT2, which gives resistance to DDT in the imago of Aedes aegypti L. has been mapped on linkage group III with respect to six visible markers. The best interpretation of the order of the genes is:–blp – blt – co – fz – wi – RDDT2 – min, but the orderblp – blt – co – fz – RDDT2 – wi – min is also possible.

Genetics of the tsetse fly Glossina morsitans submorsitans Newstead (Diptera: Glossinidae): further mapping of linkage groups I, II, and III

1999 ◽  
Vol 77 (8) ◽  
pp. 1309-1313 ◽  
Author(s):  
R H Gooding ◽  
C M Challoner
Keyword(s):  
Linkage Group ◽  
X Chromosome ◽  
Aldehyde Oxidase ◽  
Female Offspring ◽  
Tsetse Fly ◽  
Glossina Morsitans ◽  
Group Iii ◽  
Glossina Morsitans Submorsitans ◽  
Group I ◽  
Group Ii

Standard mapping procedures were used to map four loci in linkage group I (the X chromosome), two loci in linkage group II, and two loci in linkage group III of Glossina morsitans submorsitans. In the presence of the allele Srd (the distorter allele favoring production of female offspring), no recombination occurred between any of the following loci: Pgm (phosphoglucomutase), wht (white eye color), Est-X (a thoracic esterase), and Sr (sex-ratio distortion). However, in the absence of Srd (i.e., in females homozygous for Srn, the allele that permits males to sire both female and male offspring in approximately equal numbers), the loci Pgm and wht were separated by 23 ± 4.0% recombination (map distance). These results indicate that ourG. m. submorsitans strains carry two forms of the X chromosome, designated XA and XB. In support of this interpretation, two lines of G. m. submorsitans were established: in both lines, males with wild-type eyes sired families that were almost exclusively female, while males with white eyes sired families having males and females in approximately equal numbers. Two loci, Ao (aldehyde oxidase) and Est-1 (a thoracic esterase) were separated by 6.1 ± 2.3% recombination in linkage group II, and two loci, Mdh (malate dehydrogenase) and Pgi (phosphoglucose isomerase), showed 51.9 ± 4.9% recombination in linkage group III.

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