منابع مشابه
Sex - ratio in natural populations of Drosophila mediopunctata ( Diptera : Drosophilidae
The sex-ratio trait has been described as the production of progenies with unequal sexual proportions induced by meiotic drive. In Drosophila, meiotic drive of the X chromosome against the Y (yielding female biased progenies) is known in several species, including in Drosophila mediopunctata. This species has been previously studied, and the chromosome mechanism of the meiotic drive in sex-rati...
متن کاملPreliminary characterization of "sex ratio" and rediscovery and reinterpretation of "male sex ratio" in Drosophila affinis.
In D. affinis "sex ratio" (sr), a form of meiotic drive characterized by the production of mostly or only female progeny by certain males, is associated with two different X chromosome sequences, XS-I XL-II and XS-II XL-IV. The behavior of the two sequences differed, depending on the Y chromosome constitution, being either Y(L) or 0. Males with sequence XS-II XL-IV and Y(L) produced progenies w...
متن کاملChromosomal localization of microsatellite loci in Drosophila mediopunctata
Drosophila mediopunctata has been used as a model organism for genetics and evolutionary studies in the last three decades. A linkage map with 48 microsatellite loci recently published for this species showed five syntenic groups, which had their homology determined to Drosophila melanogaster chromosomes. Then, by inference, each of the groups was associated with one of the five major chromosom...
متن کاملPolytene chromosome map and inversion polymorphism in Drosophila mediopunctata.
Drosophila mediopunctata belongs to the tripunctata group, and is one of the commonest Drosophila species collected in some places in Brazil, especially in the winter. A standard map of the polytene chromosomes is presented. The breakpoints of the naturally occurring chromosomal rearrangements are marked on the map. The distribution of breaking points through the chromosomes of D. mediopunctata...
متن کاملModifier Genes of the Sex Ratio Trait in Drosophila pseudoobscura.
The msr trait of Drosophila pseudoobscura occurs when "sex-ratio" males produce a very high frequency of null-X sperm which give rise to sterile male (X/O) progeny. The trait involves dramatically lowered fecundity due to spermiogenic failure. The msr trait is multigenic and the genes are located on autosomes II, III and IV of the L116 laboratory stock. This stock also carries genes on the Y ch...
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ژورنال
عنوان ژورنال: Heredity
سال: 1989
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1989.58