Analysis of chromosome structural aberrations was limited to the 11 autosomal macrochromosomes and the Z chromosome in Giemsa-stained metaphase cells (Sonoda et al.
We analyzed 11 autosomal macrochromosomes and the Z chromosome from 50 mitotic cells per culture and recorded the frequency of SCEs.
Consequently, in general, current cytogenetic studies of avian chromosomes focus on specific macrochromosomes
, which are highly conserved (Stock & Mengden 1975, Derjusheva et al.
Chromosome morphology of SBF59 line : The number of chromosomes in the Silkie Bantam was 2n = 78, consisting of 10 pairs of macrochromosomes and 28 pairs of microchromosomes, whilst the sex chromosome type was ZZ ([male])/ZW ([female]).
The chromosomes of poultry have been defined as possessing 8 pairs of macrochromosomes and 30 pairs of microchromosomes with the sex chromosomes Z and W.
The present study sampled 100 cells and found 10 pairs of macrochromosomes and 29 pairs of microchromosomes with 92% of cells being diploid.
All species examined share the first three macrochromosomes.
The eight largest pairs of macrochromosomes (including the sex chromosomes) are distinguishable by size from the remaining 29 pairs of smaller microchromosomes.
They have eight pairs of macrochromosomes (including the sex chromosomes) and 30 pairs of microchromosomes.
They have nine pairs of macrochromosomes (including the sex chromosomes) and 29 pairs of microchromosomes.
Only Thryothorus and Thryomanes have the eighth pair of macrochromosomes.