scholarly journals Correction to: Male recombination map of the autosomal genome in German Holstein

2021 ◽  
Vol 53 (1) ◽  
Author(s):  
Saber Qanbari ◽  
Dörte Wittenburg
Keyword(s):  
Male Recombination

An amendment to this paper has been published and can be accessed via the original article.

scholarly journals GENETIC LINKAGE IN THE HORSE. II. DISTRIBUTION OF MALE RECOMBINATION ESTIMATES AND THE INFLUENCE OF AGE, BREED AND SEX ON RECOMBINATION FREQUENCY

Genetics ◽  
1984 ◽  
Vol 106 (1) ◽  
pp. 109-122
Author(s):  
Leif Andersson ◽  
Kaj Sandberg
Keyword(s):  
Genetic Linkage ◽  
Recombination Frequency ◽  
Age Effect ◽  
Significant Heterogeneity ◽  
Male Recombination ◽  
Male And Female ◽  
Factors Affecting ◽  
Individual Male ◽  
Breed Differences ◽  
Age And Sex

ABSTRACT n the present study an extensive amount of data, comprising more than 30,000 offspring in total, was analyzed to evaluate the influence of age and sex on the recombination frequency in the K-PGD segment of the equine linkage group (LG) I and the influence of age, breed and sex on recombination in the Al-Es segment of LG II. A highly significant sex difference is reported for both segments. Male and female recombination values in the K-PGD segment were estimated at 25.8 ± 0.8 and 33.3 ± 2.5%, respectively. Similarly, recombination was less frequent in the male (36.6 ± 0.7%) than in the female (46.6 ± 1.2%) in the Al-Es segment. Comparison of data from two Swedish horse breeds revealed no significant breed differences in either sex for recombination in the Al-Es segment. No evidence of an age effect was found in any segment or sex. The distribution of individual male recombination estimates was also investigated, and a significant heterogeneity among stallions was revealed in the K-PGD segment. The results are discussed in relation to previous studies on factors affecting recombination in mammals.

scholarly journals Differences in recombination frequencies during female and male meioses of the sex chromosomes of the medaka, Oryzias latipes

2001 ◽  
Vol 78 (1) ◽  
pp. 23-30 ◽  
Author(s):  
MARIKO KONDO ◽  
ERIKO NAGAO ◽  
HIROSHI MITANI ◽  
AKIHIRO SHIMA
Keyword(s):  
Genetic Map ◽  
Sex Chromosomes ◽  
Sex Chromosome ◽  
Oryzias Latipes ◽  
Male Recombination ◽  
Male And Female ◽  
Y Chromosomes ◽  
Genetic Length ◽  
Expressed Sequence ◽  
Group 1

In the medaka, Oryzias latipes, sex is determined chromosomally. The sex chromosomes differ from those of mammals in that the X and Y chromosomes are highly homologous. Using backcross panels for linkage analysis, we mapped 21 sequence tagged site (STS) markers on the sex chromosomes (linkage group 1). The genetic map of the sex chromosome was established using male and female meioses. The genetic length of the sex chromosome was shorter in male than in female meioses. The region where male recombination is suppressed is the region close to the sex-determining gene y, while female recombination was suppressed in both the telomeric regions. The restriction in recombination does not occur uniformly on the sex chromosome, as the genetic map distances of the markers are not proportional in male and female recombination. Thus, this observation seems to support the hypothesis that the heterogeneous sex chromosomes were derived from suppression of recombination between autosomal chromosomes. In two of the markers, Yc-2 and Casp6, which were expressed sequence-tagged (EST) sites, polymorphisms of both X and Y chromosomes were detected. The alleles of the X and Y chromosomes were also detected in O. curvinotus, a species related to the medaka. These markers could be used for genotyping the sex chromosomes in the medaka and other species, and could be used in other studies on sex chromosomes.

scholarly journals A MODEL OF THE NEGATIVE CORRELATION BETWEEN MALE RECOMBINATION AND TRANSMISSION FREQUENCY IN DROSOPHILA MELANOGASTER

Genetics ◽  
1979 ◽  
Vol 93 (2) ◽  
pp. 449-459
Author(s):  
Yuichiro Hiraizumi
Keyword(s):  
Drosophila Melanogaster ◽  
Excellent Agreement ◽  
Negative Correlation ◽  
Regression Equations ◽  
Stages Of Development ◽  
Male Recombination ◽  
Transmission Frequency ◽  
Normal Males ◽  
Sperm Dysfunction

ABSTRACT A model is proposed to account for the phenomenon of negative correlation between male recombination (θ) and transmission frequency (k) in Drosophila melanogaster. The model assumes that, in some stage or stages of development, the male recombination elements cause a particular event that does not occur in normal males and that this event, in turn, induces with certain probabilities male recombination and/or sperm dysfunction. The regression equations of θ on k predicted by the model were compared with those actually observed. There was generally excellent agreement between them.

Simulation of instability in genetic sexing strains: effects of male recombination in association with other biological parameters

1991 ◽  
Vol 81 (1) ◽  
pp. 11-20 ◽  
Author(s):  
E. Busch-Petersen ◽  
H. Baumgartner
Keyword(s):  
Genetic Recombination ◽  
Mass Rearing ◽  
Biological Parameters ◽  
Genetic Sexing ◽  
Male Recombination ◽  
Rate Of Progression ◽  
Control Programmes ◽  
Males And Females ◽  
Low Levels ◽  
Genetic Sexing Strains

AbstractGenetic systems have been developed in several insect species for separating males and females prior to releasing sterilized males in pest control programmes using the sterile insect technique. The systems generally depend on translocating a readily selectable gene onto the Y chromosome. A potential source of instability in such a system is genetic recombination in the male. Although such recombination was originally thought to be absent in most cyclorrhaphous Diptera, low levels have recently been found. We have developed a computer model which simulates the progression of instability in the presence of male recombination, which can be used to assess the influence of rate of recombination in combination with a range of associated genetic and biological parameters. Male recombination alone or fitness of the Y-linked translocation were found to contribute relatively little to the rate of progression of instability. By contrast reduced fitness or mating competitiveness associated with the selectable gene had a strong effect. The sex ratio and the ratio of carriers to non-carriers of the selectable gene showed patterns characteristic of the parameters modelled. The relevance of such data to the development of suitable strains for genetic sex-separation and the replacement of strains under mass rearing conditions are discussed.

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