All-male broods of Tilapia nilotica × T. aurea hybrids
1975; Elsevier BV; Volume: 6; Issue: 1 Linguagem: Inglês
10.1016/0044-8486(75)90086-1
ISSN1873-5622
AutoresYoel Pruginin, S. Rothbard, Giora W. Wohlfarth, Amir Halevy, Rom Moav, Gideon Hulata,
Tópico(s)Amphibian and Reptile Biology
ResumoThe proportion of males in single pair crosses between Tilapia nilotica females and T. aurea males was found to vary between 50 and 100%. There was no apparent influence of the T. aurea males on these proportions. In a similar test nine T. vulcani females were paired with T. aurea males, and the proportion of males in their hybrid offspring ranged between 93 and 98%. Two T. nilotica mothers of all-male hybrid broods mated with unselected T. nilotica males, and all their daughters also reproduced all-male hybrid broods when crossed with T. aurea males. The reciprocal cross of T. aurea females with T. nilotica males reproduced three males to each female offspring. Growth rate tests of the all-male T. nilotica × T. aurea hybrids, and the T. vulcani × T. aurea hybrids did not reveal heterosis.
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