Centromeric loss in translocations of centric fusion type in cattle and water buffalo

Autor: Ingemar Gustavsson, Dino Di Berardino, Lino Ferrara, Leopoldo Iannuzzi, Giulia Pia Di Meo
Rok vydání: 2008
Předmět:
Zdroj: Hereditas. 106:73-81
ISSN: 0018-0661
Popis: Iannuzzi, L., Di Berardino, D., Gustavsson, I., Ferrara, L. and Di Meo, G. P. 1987. Centromeric loss in translocations of centric fusion type in cattle and water buffalo. - Hereditas 106: 73–81. Lund, Sweden. ISSN 0018–0661. Received March 15, 1986 Robertsonian translocations in Podolian and Romagna cattle (Bos taurus L.) and Asiatic river buffaloes (Bubulus bubalis L.) were studied with C, G + C, and R-banding techniques. The investigation demonstrated: (a) presence of one block of constitutive heterochromatin in the q-arm of the cattle translocation chromosome; (b) chromosomes identified as 1 and 25 according to the system used - but presumptively 1 and 29 as earlier described - being involved in the cattle centric fusions, with the centromere region of chromosome 25(29) being lost and that of chromosome 1 being retained; (c) no constitutive heterochromatin in the q-chromosome arm of the bi-armed chromosomes 1 and 5 in the water huffaloes (with retention of the constitutive heterochromatin in their p-arms) and partial losses of centromeric heterochromatin in both arms of chromosomes 2, 3 and 4; (d) presence of a C-positive segment in the telomere region of the p-arm of chromosome 4 in the water buffalo; (e) no bi-armed chromosome common for the two species. Karyotype evolution is discussed and the urgency of an appropriate nomenclature system for cattle and buffalo chromosomes is briefly stressed.
Databáze: OpenAIRE
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