Meiotic chromosomal characteristics of domestic rabbit (New Zealand White rabbit) were investigated. For these purposes, the meiotic chromosomal preparations were made with the modified air-drying method of Imai et al(1981).
Chromomeres, sex vesicles and centromeres could be classified in the zygotene and the pachytene of the first division. The hair-like processes projecting laterally from the axes of bivalent chromosomes at the mid-to-late pachytene were observed
and
made
the appearance of the lampbrush chromosome structure. Chromosomes could be classified on the basis of the numbers and the locations of chiasma in the diakinesis, Twenty-one autosomal bivalent and a single unequal terminally associated X-Y
bivalent
were
observed during the late prophase and the metaphase of the meiosis I, Most of the bivalent types observed in the New Zealand White rabbit spermatocytes were 1CH, 1TAI, and 2TA bivalents. The mean chiasma frequency (CF) of the male New Zealand
White
rabbit was 30.2, and it was found that the CF value tended to decrease through the diakinesis and the metaphase I.
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