Muniyamma, M. (1978) Variations in microsporogenesis and the development of embryo sacs in Echinochloa stagnina (Retz.)P. Beauv. (Gramineae). Botanical Gazette, 139 (1). pp. 87-94.
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Abstract
Pollen meiosis in accession 284 (2n = ca. 126) was characterized by chromosomal abnormalities, including univalent and multivalent associations, ringlike configurations and lagging chromosomes, causing about 94% pollen sterility. Both aposporous and sexual embryo sacs were formed. The aposporous embryo sacs originated in the nucellus, and were either tetranucleate and nonfunctional or were atypical with nuclei of various sizes in different positions, a phenomenon possibly related to the frequency of amitotic divisions. The low percentage of seed set was associated with variations in embryo sac development, failure to produce embryos and the small percentage of sexual embryo sacs produced
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Plant Sciences, W. Ont. Univ., London, Canada. |
| Subjects: | Soil Science and Microbiology > Microbiology Crop Improvement |
| Divisions: | General |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 27 Jun 2012 05:44 |
| Last Modified: | 27 Jun 2012 05:44 |
| Official URL: | http://www.jstor.org/stable/2474035 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/6269 |
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