Loricariidae - Genetics

Genetics

As of 2000, only 56 loricariid species have been cytogenically investigated. The basal diploid number of chromosomes is 2n = 54 is this family, but with a wide variation in the chromosome number in this fish group, ranging from 2n = 36 in the Loricariinae, Rineloricaria latirostris, to 2n = 96 in a species of Upsilodus (Hemipsilichthys). Most members of the Ancistrini and Pterygoplichthyini have 52 chromosomes. Karyotypic evolution by means of centric fusions and centric fissions seems to be a common feature among loricariids; this is demonstrated by a higher number of biarmed chromosomes in species with lower diploid number and many uniarmed chromosomes in species with higher diploid numbers. Studies conducted with representatives of some genera of Hypostominae showed, within this group, the diploid number ranges from 2n = 52 to 2n = 80. However, the supposed wide karyotypic diversity the family Loricariidae or the subfamily Hypostominae would present is almost exclusively restricted to the genus Hypostomus, and the species from the other genera had a conserved diploid number. In some species, there is a ZZ/ZW sex-determination system.

Read more about this topic:  Loricariidae

Other articles related to "genetics, genetic":

Personalized Medicine - Background
... Advances in medical genetics and human genetics have enabled a more detailed understanding of the impact of genetics in disease ... physiology, revealed single nucleotide polymorphisms (SNPs) that account for some of the genetic variability between individuals, and made possible the use ... It is hoped that recent advancements in the genetic etiologies of common diseases will improve pharmaceutical development ...
Giuseppe Sermonti - Biography - Early Life and Career
... Born in Rome, graduated in agriculture and genetics, he entered the Superior Institute of Health in 1950, founding a department of Microbiological Genetics ... He became professor of genetics at the University of Camerino, then at the University of Palermo in 1965, and finally moved to the University of Perugia in 1970, where he is presently ... He is the discoverer of the genetic parasexual recombination in antibiotic-producing Penicillium and Streptomyces ...
Genetics - Research and Technology - DNA Sequencing and Genomics
... the most fundamental technologies developed to study genetics, DNA sequencing allows researchers to determine the sequence of nucleotides in DNA fragments ...
Management Of Baldness - Research - Genetics
2008 researchers at the University of Bonn announced they have found the genetic basis of two distinct forms of inherited hair loss, opening a broad path to treatments for baldness ... and they are now attempting to gather more genetic and biological data ...