Daily temporal organization of laying in Japanese quail: Variability and heritability - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Chronobiology International Année : 2002

Daily temporal organization of laying in Japanese quail: Variability and heritability

Résumé

In birds, many behavioral and physiological processes that occur during reproduction show daily rhythms in response to environmental temporal constraints. In this study, the individual daily organization of laying and its genetic determinant in Japanese quail (Coturnix coturnix japonica) were analyzed. For this purpose, the oviposition time of 102 randomly chosen females, maintained in long-day photoperiodic conditions (LD 14h:10h) for 1 mon was observed and extreme phenotypes selected. Laying is characterized by two parameters: oviposition interval and laying hour. The birds showed a specific time of laying during 24 h. All eggs were laid in the afternoon between 6.5 and 14 h after lights on (HALO). Two laying profiles were determined: 20% of females with an oviposition interval greater than 24h (24.7 +/- 0.2 h) (the "delayed" profile) laid progressively later each day until a pause day. The remaining 80% of the females laid at the same time each day, with few pause days and an oviposition interval close to 24h (24.0 +/- 0.2 h) (the "stable" profile). Among the females, showing this last profile, an intra-individual stability and an inter-individual variability of laying hour was established. Two extreme laying phenotypes were then determined: the "early" phenotype (E) for females laying on average between 7.5 and 9.5 HALO and the "late" phenotype (L) for females laying between 12.5 and 14 HALO. In order to study the genetic basis of the laying hour, three females of each extreme phenotype were selected and crossed with two different males. The E and L females produced 57 FIE and 42 FIL daughters, respectively. F I females displayed both laying profiles. However, the proportion of females displaying a "delayed" profile was higher in the L line (50%) than in the E line (29.8%). For the "stable" daughters, artificial selection induced an advance in laying hour of 4.7% for the E line and a delay of 4.7% for the L line. Realized heritability was estimated at 0.5. Moreover, the laying hour of the daughters was correlated positively to that of the mothers (N = 61; r = 0.45). These results support the notion of heritability of oviposition time in Japanese quail.
Fichier non déposé

Dates et versions

hal-01308877 , version 1 (28-04-2016)

Identifiants

Citer

Cécilia Houdelier, Catherine Guyomarc'H, Sophie Lumineau. Daily temporal organization of laying in Japanese quail: Variability and heritability. Chronobiology International, 2002, 19 (2), pp.377--392. ⟨10.1081/CBI-120002879⟩. ⟨hal-01308877⟩
33 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More