The difference in embryonic mortality between sexes in auto sexing faded utility pigeons
1998
Meleg, I. | Horn, P. (PANNON Agrartud. Egyet., Kaposvar (Hungary). Allattenyesztesi Kar)
The aim of this study was to measure the sex ratio and early late embryonic mortality of male and female pigeons in auto sexing faded (StF) utility population. In the experiment 480 pairs of breeding pigeons produced 8497 eggs during one year of production recording. The data were separately analysed by the seasons spring, summer, autumn and winter. The sex ratio of squabs hatched differed significantly (P0.001) from the 50-50 percent characteristic of pigeons. The male:female ratio was 1996:2566 or 43.75 percent:56.24 percent averaged over the seasons. The difference in the sex ratio experienced at hatching was caused by the 2.5 times higher late and early embryonic mortality rate of males compared to females. The differences and their magnitude in embryonic mortality between sexes were not influenced by seasons. The data presented indicate that the linked sex chromosome the faded StF gene in homozygous double dosage state in, males significantly (P0.001) increases embryonic mortality by 6.25 percent, compared to homozygous females in auto sexing utility pigeon populations
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