Genet Res. Sex-biased dispersal has traditionally been investigated through comparisons of bi-parentally inherited autosomal genetic variation with maternally inherited mitochondrial genetic variation, but to date sex chromosome markers have been used to address this topic in only a relatively small number of species.
Skip to main content. For this we used an Asty exon primer pair previously used to provide evidence for Asty transcripts to amplify testis cDNA samples from 1. The combination provides a much broader picture of genetic variation in the two populations than would be obtained from the application of autosomal microsatellites alone.
This is because the X chromosome is large and contains many more genes than the smaller Y chromosome. Genome Biol 11 : R
The markers we used were originally developed for Kangaroo Island tammar wallabies so this could reflect ascertainment bias when applying these markers to Garden Island samples. Expression in the MSYq deficient mice y-axis, Cy3 label, arbitrary units for each clone is plotted versus expression in age- which chromosome carries sex linked traits in Crawley strain-matched normal testis control x-axis, Cy5 label, arbitrary units.
The highly repetitive nature of the mouse Y chromosome long arm presents formidable challenges for the determination of its functional gene content. Population genetic software for teaching and research-an update.
Fine-scale spatial genetic correlation analyses reveal strong female philopatry within a brush-tailed rock-wallaby colony which chromosome carries sex linked traits in Crawley southeast Queensland. Cy3 was used to label the test mutant sample and Cy5 the control normal sample in all cases.
In a sex-linked disease, it is usually males who are affected because they have a single copy of X chromosome that carries the mutation.
The X chromosome in population genetics. At meiosis the X and Y chromosomes first pair then disjoin and pass to different cells. The tammar wallaby Macropus eugenii is the first marsupial species for which both X and Y chromosome microsatellites have been characterised MacDonald et al.
Thus, data from sex-linked markers have the capacity to contribute to management decisions such as the identification of management units and appropriate sources of animals for translocation or genetic rescue should one of the island populations become critically endangered or extinct. Download references.
Consequently, four autosomal loci, Me, Me, Me and Me, were excluded from further population genetic analyses only four loci were excluded because two loci already excluded, Me and Me, constituted the fifth locus pair that displayed significant LD.