Nota sôbre um possível fator sub-letal em gado Holstein-Friesian

Resumo

In this note the A. A. relate the occurrence of a possible sub-lethal factor, on the Holstein-Friesian herd of Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba. The sire Horto was mated with his own mother, Brisa, and so, were obtained two calves, a male and a female, consecutively. Both the calves presented flexion and deviation of the fore legs. The sire's death has not alloved further observations. The study of these history cases excludes the mother's nutritional deficiency, as the cause of related phenomenon. In the consulted literature, VEIGA and MEAD et al. relate similar cases, although these are observed in other breeds of cattle The A. A. admit that cause of occurrence is a possible sublethal recessive factor, put in evidence by inbreeding.


IProf. Catedrático. 5ª. Cadeira - Escola S. de Agricultura "Luiz de Queiroz"

IIAssistente. 5ª. Cadeira - Escola S. de Agricultura "Luiz de Queiroz"

ABSTRACT

In this note the A. A. relate the occurrence of a possible sub-lethal factor, on the Holstein-Friesian herd of Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba.

The sire Horto was mated with his own mother, Brisa, and so, were obtained two calves, a male and a female, consecutively. Both the calves presented flexion and deviation of the fore legs. The sire's death has not alloved further observations.

The study of these history cases excludes the mother's nutritional deficiency, as the cause of related phenomenon.

In the consulted literature, VEIGA and MEAD et al. relate similar cases, although these are observed in other breeds of cattle

The A. A. admit that cause of occurrence is a possible sublethal recessive factor, put in evidence by inbreeding.

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BIBLIOGRAFIA

  • 1 - EATON, O. N. - A summary of Lethal Characters in Animals and Man. Jour Hered. 28: 320-326. Washington D. C. 1937.
  • 2 - LERNER, I. M. - Caracteres Letais e Sub-Letais nos Animais Domésticos. Trad. L. P. Jordão. Bol. Ind. An. - Nova Série. 8. n. 1-2: 92-101. São Paulo. 1946.
  • 3- RICE, V. A. - Cria y Mejora del Ganado. Vers. cast. 1a. Ed.: 583. México. 1947.
  • 4 -HART, G. H., GUILBERT, H. R., WAGNON, K. A. and GOSS, H. - Acorn Calves. Ca. Agr. Exp. Sta. Bul. 699: 3-11. Berkeley. 1947.
  • 5 - VEIGA, J. S. - Membros Flexionados. Um Fator Hereditário Sub-Letal, Recessivo Simples, nas Raças Zebuinas Gir e Indubrasil. Rev. Fac. Med. Vet. 3: 101-107. S. Paulo. 1945.
  • 6 -MEAD, S. W., GREGORY, P. W., REGAN, W. M. - Heredity Congenital Flexed Pasterns in Jersey Cattle. Jour. Hered., 34: 367-372. Washington D. C. 1943.
  • 7 -LUSH, J. L. - Animal Breeding Plans. 2a. Ed.: 121-122. Ames, Iowa. 1943.
  • 8 -HAGEDOORN, A. L. - Animal Breeding 3a. Ed.: 113-114. Londres. 1948.

  • Nota sôbre um possível fator sub-letal em gado Holstein-Friesian
    W. R. JardimI; A. M. PeixotoII

Datas de Publicação

  • Publicação nesta coleção
    06 Nov 2012
  • Data do Fascículo
    1951
Universidade de São Paulo, Escola Superior de Agricultura Av.Páduas Dias, 11, C.P 9 / Piracicaba - São Paulo, Brasil, tel. (019)3429-4486, (019)3429-4401 - Piracicaba - SP - Brazil
E-mail: scientia@esalq.usp.br