Ramachandra, N. B. and Ranganath, H. A. (1990) The chromosomes of 2 drosophila races - drosophila-nasuta-nasuta and drosophila-nasuta-albomicana .5. introgression and the evolution of new karyotypes. Journal of Zoological Systematics and Evolutionary Research, 28 (1). pp. 62-68.
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Abstract
Reciprocal crosses were made between an Indian strain of D. n. nasuta (2n=8) and the Thailand strain of D. n. albomicana (2n=6). Hybrids were fertile. They were inbred for over four years. Later, the karyotypes of the hybrid populations were analysed. In the hybrid progeny of the cross between D. n. nasuta females and D. n. albomicana males, there were six types of kaotypes. Of these, only two types had a diploid content of chromosomes. They were males with 2n=7 and females with 2n=8, while others were aneuploids. This hybrid population is designated as Cytorace III. On the other hand, hybrid progeny of the reciprocal cross had 2n‐8 in both males and females; and there was no karyotypic variation. This hybrid population is named as Cytorace IV. The composition of these new karyotypes of Cytorace III and IV have been presented and compared with those of Cytorace I and II reported by Ramachandra and Ranganath (1986).
| Item Type: | Article |
|---|---|
| Subjects: | B Life Science > Zoology |
| Divisions: | Department of > Zoology |
| Depositing User: | Dr Raju C |
| Date Deposited: | 21 Jan 2021 09:47 |
| Last Modified: | 25 Jan 2021 06:05 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/15408 |
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