Linkage studies in Tribolium castaneum (Herbst). XII. A revision of linkage group II

Genome ◽  
1987 ◽  
Vol 29 (1) ◽  
pp. 26-33 ◽  
Author(s):  
Alexander Sokoloff ◽  
Robert F. Ferrone ◽  
John D. Chaney ◽  
Jerry Braden ◽  
Ricardo J. Muñoz
Keyword(s):  
Linkage Group ◽  
Gamma Irradiation ◽  
Tribolium Castaneum ◽  
Gene Clusters ◽  
Linkage Studies ◽  
Eye Color ◽  
Y Chromosomes ◽  
Group Ii ◽  
Linkage Relationships ◽  
Number Of Segments

Data are presented to show the linkage relationships of a number of genes in linkage group II of Tribolium castaneum and a revised map of this linkage group is presented bearing eight well-established points. Some of these points were establishable with the aid of an accidental inversion induced by gamma irradiation. Five additional mutants are also in this linkage group as a result of the revision, but their relative position needs to be established through additional linkage studies. The linkage map suggests the presence of two gene clusters, one affecting the eye color and morphology and the other including homeotic mutants that affect the morphology of the maxillary and labial palps, the thorax, and the abdominal sternites. Data are presented to show that the frequency of recombination for a number of segments in linkage group II is not equal in the two sexes. The literature bearing on the evolution of the karyotype in Tribolium is reviewed, and it is concluded, on the basis of the present evidence, that it is linkage group II and not linkage group IX that became translocated to the X and Y chromosome in a T. castaneum like ancestor to produce the much larger neo-X and neo-Y chromosomes of T. confusum. Key words: Tribolium, linkage, gamma irradiation.

Genetics of Glossina morsitans morsitans (Diptera: Glossinidae). XIII. Mapping the locus for tetrazolium oxidase in linkage group I and refinement of the linkage group II map

Genome ◽  
1988 ◽  
Vol 30 (6) ◽  
pp. 885-887 ◽  
Author(s):  
R. H. Gooding ◽  
B. M. Rolseth ◽  
S. A. Tarimo
Keyword(s):  
Linkage Group ◽  
Key Words ◽  
Aldehyde Oxidase ◽  
Glossina Morsitans Morsitans ◽  
Linkage Maps ◽  
Glossina Morsitans ◽  
Eye Color ◽  
Group I ◽  
Group Ii

The locus for tetrazolium oxidase, To, is mapped at 4.3 ± 1.3 recombination units from the locus for arginine phosphokinase, Apk, in linkage group I, and the distance between the eye color locus, sal, and Apk is confirmed to be about 39.5 ± 3.2 recombination units. In linkage group II the loci for aldehyde oxidase, Ao, and for two esterases are arranged in the order Ao Est-1 Est-2 with 3.5 ± 1.2 recombination units separating Ao and Est-1 and 8.3 ± 1.8 recombination units separating Est-1 and Est-2.Key words: Glossina morsitans, tetrazolium oxidase, aldehyde oxidase, esterases, linkage maps.

LINKAGE STUDIES IN TRIBOLIUM CASTANEUM HERBST. VIII. SHORT ANTENNA, A DOMINANT MARKER FOR THE SEVENTH LINKAGE GROUP

1963 ◽  
Vol 5 (3) ◽  
pp. 299-306 ◽  
Author(s):  
Alexander Sokoloff ◽  
Peter S. Dawson ◽  
Du Wayne C. Englert
Keyword(s):  
Linkage Group ◽  
Tribolium Castaneum ◽  
Linkage Studies ◽  
Dominant Marker

LINKAGE STUDIES IN TRIBOLIUM CASTANEUM. XI. THE MAP POSITION OF CHARCOAL, A PSEUDOALLELE OF BLACK

1978 ◽  
Vol 20 (1) ◽  
pp. 139-145 ◽  
Author(s):  
Eric Brown ◽  
Alexander Sokoloff
Keyword(s):  
Linkage Group ◽  
Tribolium Castaneum ◽  
Reciprocal Cross ◽  
Autosomal Dominant ◽  
Linkage Studies ◽  
Lethal Effects ◽  
Recessive Lethal ◽  
Reciprocal Crosses ◽  
Group Iii ◽  
Significant Difference

Charcoal, (Chr), an autosomal dominant with recessive lethal effects is located in linkage group III in Tribolium castaneum (Herbst). Its map position has been determined in respect to aureate (au), light ocular diaphragm (lod) and black (b). The distances between the various genes vary, depending on the sex of the cross. The Chr ++/+ lod au ♂ × +lod au/+lod au ♀ crosses give the following recombination values: au-lod = 22.19 ±.42%, Chr-lod = 20.03 ±.40% and Chr-au = 41.28 ±.49%. The reciprocal crosses give au-lod 28.08 ±.45%, Chr-lod = 17.67 ±.38% and Chr-au = 44.11 ±.50%. For the larger distances encompassed by the Chr-au region the recombination values in the two sexes were not significantly different. For the shorter distances the recombination values were significantly higher in the males than in the females in the au-lod region. They were not found to be significantly different in the Chr-lod region probably because of difficulty in identifying lod and non-lod beetles in the presence of Chr. Tests of allelism indicate that Chr and black b are pseudoalleles which recombine at a different rate in the two sexes. Chr +/+b ♂ × +b/+b ♀ gave 0.07% recombinants, while the reciprocal cross gave 0.014% recombinants, a significant difference. The data suggest that the order of the genes in this linkage group is Chr - b - lod - au.

LINKAGE GROUP IV OF TRIBOLIUM CASTANEUM

1972 ◽  
Vol 14 (3) ◽  
pp. 675-680 ◽  
Author(s):  
Peter S. Dawson
Keyword(s):  
Linkage Group ◽  
Tribolium Castaneum ◽  
Group Iv ◽  
Eye Color ◽  
Flour Beetle ◽  
Color Mutant ◽  
White Locus ◽  
Fourth Pair

A new recessive eye color mutant, hazel, of the flour beetle, Tribolium castaneum, has been mapped in linkage group IV near the white locus, thus establishing the existence of a fourth pair of closely linked eye color genes in this species. A revision of linkage group IV is proposed.

THE BLOB MUTANT OF TRIBOLIUM CASTANEUM

1971 ◽  
Vol 13 (4) ◽  
pp. 801-810 ◽  
Author(s):  
Peter S. Dawson
Keyword(s):  
Linkage Group ◽  
Linkage Map ◽  
Tribolium Castaneum ◽  
X Chromosome ◽  
Dosage Compensation ◽  
Incomplete Penetrance ◽  
Far Right ◽  
Flour Beetle ◽  
Variable Expressivity ◽  
Linkage Relationships

A new sex-linked mutation in the flour beetle Tribolium castaneum is described and illustrated. Blob (bb), an antennal mutant, is located near the far right end of the known linkage map of the X chromosome. It is recessive, with incomplete penetrance and variable expressivity, and fails to exhibit dosage compensation. The expression of bb is discussed in relationship to models of antennal development in this species. Apparent rediscovery of the pegleg mutation has confirmed a previous report on the linkage relationships of pearl and pegleg in linkage group II.

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.

scholarly journals A gene triplet in the mouse

1970 ◽  
Vol 15 (2) ◽  
pp. 227-235 ◽  
Author(s):  
A. G. Searle ◽  
Gillian M. Truslove
Keyword(s):  
Linkage Group ◽  
In Utero ◽  
White Hair ◽  
Close Linkage ◽  
Group Ii ◽  
Tail Tip ◽  
Dominant Spotting

SUMMARYMice heterozygous for rump-white (Rw) have white hair in lumbo-sacral and caudal regions, although the tail-tip is sometimes pigmented. The homozygote is lethal in utero. No recombination has been found between Rw and the very closely linked spotting genes patch (Ph) and the viable allele of W (Wv). The compounds between these genes are all viable and fertile, although individual homozygotes are either lethal (Ph, Rw) or sterile and anaemic (Wv). It is concluded that they are non-allelic, but form a gene triplet. Close linkage between a cluster of dominant spotting genes and an angora gene in mouse and rabbit provide evidence for homology of part of linkage group II in the rabbit and part of linkage group XVII in the mouse.

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 Curly-whiskers and its linkage with tail-kinks in linkage group II of the mouse

1966 ◽  
Vol 8 (1) ◽  
pp. 111-113 ◽  
Author(s):  
D. S. Falconer ◽  
J. H. Isaacson
Keyword(s):  
Linkage Group ◽  
Inbred Strain ◽  
Recessive Gene ◽  
Coat Colour ◽  
Group Ii ◽  
Research Institute

Curly-whiskers (cw) is a recessive gene which was found in 1958 by Mr C. J. W. Smith of the Chester Beatty Research Institute, London. It arose in a subline of the CBA/Cbi inbred strain. The first mutant animals were one male and one female in a litter of five. The two mutants were mated together and a sib-mated subline was continued from them in which 500 mice were bred, all of which were curly-whiskered. This established the mutant to be fully penetrant. Curly-whiskers resembles the hair-waving genes in causing waving of the vibrissae, but it has no obvious waving effect on the hairs of the coat. The coat texture is, however, slightly abnormal and Mr Smith noted also that on the CBA background there was an appreciable darkening of the coat colour. Homozygotes (cw/cw) are easily classifiable soon after birth by the curled vibrissae. Heterozygotes (+/cw) often have slightly curled vibrissae, and the gene is therefore not fully recessive; but the distinction between +/cw and +/+ could not be relied on, and in the linkage tests cw was treated as a recessive gene.

The "reindeer" mutation and a revision of linkage groups V and X in the flour beetle, Tribolium castaneum

1984 ◽  
Vol 26 (6) ◽  
pp. 762-764 ◽  
Author(s):  
Peter S. Dawson
Keyword(s):  
Linkage Group ◽  
Key Words ◽  
Tribolium Castaneum ◽  
Linkage Groups ◽  
Dominant Mutation ◽  
Genetic Studies ◽  
Group V ◽  
Flour Beetle ◽  
Dominant Mutants

Reindeer (Rd) is a dominant mutation affecting antenna morphology in the tenebrionid flour beetle, Tribolium castaneum. In contrast with most dominant mutants previously described for this species, homozygotes are fully viable, thus making Rd very useful for genetic studies. Rd is tentatively assigned to either linkage group IX or X. Abbreviated appendages (aa), formerly placed in linkage group X, is reassigned to linkage group V on the basis of demonstrated linkage to jet (j).Key words: Tribolium, mutation Rd, linkage, antenna morphology.

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