Studies on Rodent Chromosomes
Vl. Co-existence of Rattus rattus with 38 and 42 Chromosomes in South Western India
1973 年 38 巻 3 号 p. 403-410
詳細
1973 年 38 巻 3 号 p. 403-410
Chromosomes of two subspecies of Rattus rattus, namely, R.r. wroughtoni and R.r. rufescens, from Sagar, Mysore State, South Western India, have been examined. R.r. wroughtoni has 42 chromosomes typical of Rattus rattus, while R.r. rufescens shows 2n=38. The karyotype of the latter is similar to that described by other workers for Rattus rattus populations with 2n=38 from other parts of the world. This is the first report of Rattus rattus with 38 chromosomes from India. It is proposed that the 2n=38 karyotype is evolved from the basic Rattus rattus karyo-type with 2n=42 by centric fusion and pericentric inversions.
