![Sample our Bioscience journals, sign in here to start your access, Latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5925/TOC-Subject-Sample-2021-Bioscience.jpg"})
SUMMARY
A detailed karyotype comparison among R. cornutus cornutus, R. ferrumequinum nippon and R. luctus formosae are made on the basis of relative length, G- and C-band patterns. The data presented here suggest strongly M.SM-1 and 2 in R. f. nippon were formed by centric fusion of four of five small A-autosome pairs such as those in A-23∼25, 27 and 28 of R. c. cornutus, while occurrence of M-SM-3 in the former was caused by pericentric inversion of a small A-pair such as that in A-24 or 25 of the latter, confirming the assumption described in our previous report (ANDŌ et al. 1980a). On the other hand, appearance of the secondary short arms of A-autosomes in R. f. nippon is attributable to the C-band material added to the telomeres of A-autosomes. Addition of heterochromatin is considered to have taken place also in the short arm of the ST-X chromosome in R. f. nippon, and to have brought about the morphological difference of the Y chromosome within Rinolophus.
