Cytogenetic Study of "Saavedreno" Creole Cattle.

  • Luca J. C. De
    Centro de Investigaciones en Genética Básica y Aplicada (CIGEBA)
  • Zufriategui L.
    Centro de Investigaciones en Genética Básica y Aplicada (CIGEBA)
  • Ripoli M. V.
    Centro de Investigaciones en Genética Básica y Aplicada (CIGEBA)
  • Giovambattista G.
    Centro de Investigaciones en Genética Básica y Aplicada (CIGEBA)
  • Rojas F. V.
    Centro de Investigación Agrícola Tropical (CIAT)
  • Dulout F. N.
    Centro de Investigaciones en Genética Básica y Aplicada (CIGEBA)

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The “Saavedreño” Creole cattle was established at the Saavedra Experimental Station (Santa Cruz de la Sierra, Bolivia) in the seventies' aiming to obtain a dairy breed adapted to humid tropical environments. The relationship between the occurrence of the 1/29 translocation and subfertility or infertility is well known. On the other hand, the analysis of the Y chromosome morphology is useful to determine the possible introgression with Bos indicus. As the incidence of 1/29 translocation and Y-chromosome morphology has not been previously studied in the “Saavedrerio” Creole cattle, cytogenetic studies were performed in 40 bulls from different origin and 47 dams. Results obtained demonstrated a low frequency of 1/29 translocation (1.15%) in the animals and the presence of an acrocentric and submetacentric Y chromosome morphology.

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