NON RANDOM ASSOCIATION OF SOMATIC CHROMOSOMES IN THE CHICKEN-COTURNIX QUAIL HYBRID AND THE PARENTAL SPECIES

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Abstract
The larger 6 paris of chromosomes of the chicken, Coturnix quail and their hybrid lie at the periphery of a rosette-like arrangement at somatic metaphase. In order to determine if there was non-random association between homologues, observations and counts of somatic metaphase configurations were made from the pulp of pin feathers. One hundred and ninety eight somatic metaphase configurations were recorded and there was a definite association between the members of chromosome pair 4 in the chicken. The other sets of chromosomes were randomly distributed. Chromosome 4, which is the sex chromosome (Z) in the quail, was also non-randomly distributed (88 sets), with the other 5 sets of homologous pairs distributed randomly. In the chicken X quail hybrid there was a genomal "affinity" with a tendency for the chromosomes from one species to stay next to their own kind in the hybrid cells. There is no clear explanation for these observations.

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