Nath, J and Swaminathan, M.S. and Mehra, K.L (1970) Cytological Studies in the Tribe Paniceae, Gramineae. Plant Science and Plant Products plants , 35 (1). pp. 111-131.
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Abstract
Details are presented on the chromosome numbers of strains belonging to 21 species and eight genera of Paniceae. Meiotic studies in the species examined revealed that chromosome pairing was regular in diploids but irregular in polyploids and aneuploids. It is suggested that polyploidy and meiotic irregularities are mechanisms which favour apomixis in the members of the Paniceae studied. The quadrivalent frequency in strains of Cenchrus ciliarus, Paspalum plicatum and P. simplex seem to be high enough to indicate their autoploid origin. A plant of Digitaria eriantha, which was morphologically indistinguishable from other plants of the same species, was of interest as it exhibited meiotic breakdown. The pollen mother cells at early prophase lacked well differentiated cell walls and several nuclei formed cenocytes. A few cells showed chromosome fragmentation and metaphase was not reached. The fragmented chromosomes formed restitution nuclei and a few cells formed multiple spindles.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Agronomy and Genetics, College of Agriculture and Forestry, West Virginia University, Morgantown, West Virginia, U.S.A |
| Subjects: | Crop Improvement |
| Divisions: | General |
| Depositing User: | Library ICRISAT-InfoSAT |
| Date Deposited: | 06 Mar 2012 05:03 |
| Last Modified: | 06 Mar 2012 05:03 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/3502 |
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