Abstract:
:In animals, supernumerary chromosomes and their evolution have mostly been studied in sexual reproducing species. In the present study, for the first time, the natural distribution and stability of supernumerary microchromosomes were investigated in the unisexual fish species Poecilia formosa. Natural habitats throughout the range of P. formosa were screened for the presence of microchromosomes over several years. A high frequency of microchromosomes was found in the Río Purificación river system. Evidence points to the presence of the same microchromosome lineage over many generations. No supernumerary chromosomes were found elsewhere than in the Río Purificación representing a significant difference in the distribution of microchromosome-bearing individuals between the Río Purificación and all other collection sites.
journal_name
Cytogenet Genome Resjournal_title
Cytogenetic and genome researchauthors
Lamatsch DK,Nanda I,Schlupp I,Epplen JT,Schmid M,Schartl Mdoi
10.1159/000079286keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
189-94issue
2-4eissn
1424-8581issn
1424-859Xpii
79286journal_volume
106pub_type
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