Routine cytogenetic investigations of the Chianina cattle (BTA) breed revealed the presence of longer and smaller chromosomes than the largest (BTA1) and smallest (BTA29) chromosomes in the cells of a young, normal-looking bull used for reproduction. Application of both RBA-banding and Ag-NOR techniques, as well as the use of the FISH technique and specific molecular markers of both BTA11 (IL1B, ASS and LGB) and BTA21 (SERPINA and D21S45) established that these two abnormal chromosomes were the product of a reciprocal translocation between BTA11 and BTA21. Both der(11) and der(21) were C-band positive and the chromosome regions affected were rcp(11;21)(q28;q12). The young bull had a normal body conformation, including external genitalia, normal levels of testosterone (as in the control) and non-detectable levels of both 17 beta-estradiol and progesterone (as in the control). The animal never showed libido in the presence of both males and females in oestrus. After slaughter at 18 months, histological evaluation revealed normal organized testes, seminiferous tubules and epididymis but with poor proliferative germ cells consisting mainly of spermatogonia, middle pachytene spermatocytes and early spermatids with late spermatids and spermatozoa being very rare. Copyright

A new case of reciprocal translocation in a young bull: rcp(11;21)(q28;q12) / L. MOLTENI, A. PERUCATTI, A. IANNUZZI, GP. DI MEO, L. DE LORENZI, A. DE GIOVANNI, D. INCARNATO, G. SUCCI, E. CRIBIU, A. EGGEN, L. IANNUZZI. - In: CYTOGENETIC AND GENOME RESEARCH. - ISSN 1424-8581. - 116:1-2(2007), pp. 80-84.

A new case of reciprocal translocation in a young bull: rcp(11;21)(q28;q12)

L. MOLTENI
Primo
;
L. DE LORENZI;A. DE GIOVANNI;G. SUCCI;
2007

Abstract

Routine cytogenetic investigations of the Chianina cattle (BTA) breed revealed the presence of longer and smaller chromosomes than the largest (BTA1) and smallest (BTA29) chromosomes in the cells of a young, normal-looking bull used for reproduction. Application of both RBA-banding and Ag-NOR techniques, as well as the use of the FISH technique and specific molecular markers of both BTA11 (IL1B, ASS and LGB) and BTA21 (SERPINA and D21S45) established that these two abnormal chromosomes were the product of a reciprocal translocation between BTA11 and BTA21. Both der(11) and der(21) were C-band positive and the chromosome regions affected were rcp(11;21)(q28;q12). The young bull had a normal body conformation, including external genitalia, normal levels of testosterone (as in the control) and non-detectable levels of both 17 beta-estradiol and progesterone (as in the control). The animal never showed libido in the presence of both males and females in oestrus. After slaughter at 18 months, histological evaluation revealed normal organized testes, seminiferous tubules and epididymis but with poor proliferative germ cells consisting mainly of spermatogonia, middle pachytene spermatocytes and early spermatids with late spermatids and spermatozoa being very rare. Copyright
Cattle ; Reciprocal translocation ; Cytogenetics ; Reproduction ; FISH
Settore AGR/17 - Zootecnica Generale e Miglioramento Genetico
Settore AGR/19 - Zootecnica Speciale
2007
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/26628
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