1974 年 39 巻 1 号 p. 57-62
Lens nigricans, a rare species of lentil possess a somatic chromosome number of 14 (2n). The somatic complement comprises of 4 pairs of median chromosome, out of which one pair bear satellite. The secondary constriction is very near to the primary constriction. This type of SATELLITE has been termed as “Intercallary trabant” by Darlington (1965). The meiotic system is highly irregular in this species. Formation of univalent, multivalents, chains, rings, bridges and laggards has been recorded. The meiotic chromosomes shows asynaptic behaviour, which may be the outcome of various types of exchanges between chromosomes or it may be due to change in the behaviour of the gene concerned. From the present investigation it appears that L. nigricans has not acquired stability as yet and translocation has played an important role in its evolution.