Heterosis in body weight related to growth performance of parental lines of Japanese quail and to heterosis in lay

1. Three outbred lines of Japanese quail and their reciprocal crosses were used. The lines differed in mature body weight or in the shape of the growth curve. Growth was described by body weight (BW) at 0, 4, 7, 14, 21, 28, 35, 42, 48, 56, 63 and 70 d of age and expressed by the parameters of Richar...

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Bibliographic Details
Published in:British poultry science 2002-08, Vol.43 (4), p.508-517
Main Authors: Hyánková, L., Dědková, L., Knížetová, H., Hort, J.
Format: Article
Language:English
Subjects:
Aging - genetics
Aging - physiology
Animals
Body Weight - genetics
Coturnix - genetics
Coturnix - growth & development
Crosses, Genetic
Female
Hybrid Vigor
Male
Oviposition - genetics
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Summary:1. Three outbred lines of Japanese quail and their reciprocal crosses were used. The lines differed in mature body weight or in the shape of the growth curve. Growth was described by body weight (BW) at 0, 4, 7, 14, 21, 28, 35, 42, 48, 56, 63 and 70 d of age and expressed by the parameters of Richards' function. Dickerson's model was used to estimate direct genetic, maternal genetic and direct heterotic effects. 2. The magnitude of BW heterosis was not constant during postnatal growth, it showed a different curvilinear age-trend for each hybrid combination. 3. The age-trend of BW heterosis resulted from the change of the shape of the growth curve. 4. The age-trend of BW heterosis and its maximum magnitude were associated with differences in the growth pattern of parental lines. 5. The heterosis at the inflection point was accompanied by heterosis in egg number.
ISSN:0007-1668
1466-1799
DOI:10.1080/0007166022000004417