Abstract:
:B chromosomes are supernumerary elements present in about 15% of eukaryotic species and are most frequently heterochromatic, behave parasitically, show a transmission rate higher than standard (A) chromosomes, and can provoke harmful effects on carriers. In the current work, Prochilodus lineatus individuals carrying eight and nine B chromosomes were obtained by induced crossing performed involving breeders with different B chromosome numbers in their cells. The high B chromosome numbers found in the offspring were recorded for the first time in this species. The use of cytogenetic techniques applied in the present study revealed that regardless of the increase in number of B chromosomes in the genome of these individuals, those elements did not presented active genes, and showed their normal heterochromatic characteristic.
journal_name
Genet Mol Bioljournal_title
Genetics and molecular biologyauthors
Voltolin TA,Senhorini JA,Foresti F,Bortolozzi J,Porto-Foresti Fdoi
10.1590/s1415-47572011005000009subject
Has Abstractpub_date
2011-04-01 00:00:00pages
220-4issue
2eissn
1415-4757issn
1678-4685journal_volume
34pub_type
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