Abstract
The reciprocal translocation heterozygotes of Disporum sessile (2n=16, 1IV+6II) comprised two pairs of heteromorphic chromosomes. The two pairs, however, were not distinguishable from each other at MI and AL A chiasma was formed in the ‘interstitial’ segment of 29.6 per cent of pairs of heteromorphic chromosomes and the frequency of equational Al separation (analysed at AI and AII) was 30.0 per cent. The result is in accordance with the chiasmatype hypothesis.
