Kumar, R.S. and Singh, U.P. and Singh, R.B. and Singh, R.M. (1984) Meiotic behaviour in a hypertriploid plant of pearl millet (Pennisetum americanum (L.) K. Schum. Genetica Agraria, 38 (2). pp. 139-148.
![[img]](http://eprints.icrisat.ac.in/style/images/fileicons/application_pdf.png) |
PDF
- Updated Version
Restricted to ICRISAT researchers only |
Abstract
A hypertriploid (2n = 22), detected in the progeny of a partially desynaptic trisomic (2n = 15), differed in morphology from its maternal trisomic sibs, but was quite similar to triploids. The microsporocytes showed mean chromosome associations of 0.1IV + 4.43III + 2.96II + 2.34I at metaphase I with a mean chiasma number of 13.4 per cell. The 20 types of chromosome configurations observed were explained by assuming that the plant was trisomic for 6 chromosomes and tetrasomic for one. The chromosome associations observed suggested the presence of displaced duplications or small interchanges within the genome of the plant. The tetrasomic chromosome mostly formed a quadrivalent which sometimes broke down to form 2II or 1III + 1I and rarely 1II + 2I or 4I. Most of the univalents arose from the trisomic chromosomes. Abnormal distribution of chromosomes at anaphase I resulted in the formation of dyads and tetrads with unequal chromosome numbers. The plant was highly sterile but set some grain upon open pollination
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Genetics & Plant Breeding Institute of Agricultural Science, Banaras Hindu University, Varanasi 221 005, India |
| Subjects: | Crop Improvement |
| Divisions: | Millet |
| Depositing User: | Mr. SanatKumar Behera |
| Date Deposited: | 20 May 2012 12:14 |
| Last Modified: | 20 May 2012 12:14 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5529 |
Actions (login required)
 |
View Item |
