1989 年 54 巻 3 号 p. 565-571
The present communication puts on record the chromosome behaviour during reduction division in the pollen mother cells of 21 diploid species of Astragalus, growing wild in the Kashmir Himalaya. In all these species meiosis was by and large normal. The occasional segregational anomalies, observed in a few species, have also been described. The low frequency of PMCs with these anomalies indicate that these are not due to any genetic change but can be explained on the basis of occasional segregational errors only. It has been pointed out that there is a positive correlation between the recombination indices and the total chromatin lengths in these species.