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Chromosome numbers, meiotic behavior and pollen fertility in a collection of Paspalum nicorae Parodi accessions
- Source :
- Crop Breeding and Applied Biotechnology, Vol 8, Iss 3, Pp 212-218 (2008)
- Publication Year :
- 2008
- Publisher :
- Byte Systems - Solucoes Digitais, 2008.
-
Abstract
- Chromosome number, meiotic behavior and pollen viability were evaluated in a collection of 53 Paspalum nicorae Parodi accessions, which are part of a breeding project of the species. All accessions are tetraploid, with 2n=4x=40. Despite the invariable chromosome numbers, there was variation among accessions in the frequencies of different chromosome configurations at diakinesis and metaphase I, such as univalents, trivalents and quadrivalents. Other abnormalities as bridges and laggards were also observed at anaphase and telophase I. Meiotic indexes ranged from 82.00 to 99.50% and pollen viability from 88.99 to 95.06%. As the species is pseudogamous apomictic, fertile pollen is necessary for endosperm formation. Results show that all plants are meiotically stable and have enough fertile pollen to be used as male parents in controlled crosses.
- Subjects :
- Paspalum nicorae
lcsh:Biotechnology
chromosome number
lcsh:Plant culture
Biology
medicine.disease_cause
Endosperm
Meiosis
lcsh:TP248.13-248.65
Apomixis
Pollen
Botany
medicine
lcsh:SB1-1110
Telophase
General Environmental Science
Anaphase
fungi
food and beverages
Chromosome
pollen viability
biology.organism_classification
meiotic behavior
apomixis
General Earth and Planetary Sciences
Paspalum
Subjects
Details
- ISSN :
- 19847033
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Cropp Breeding and Applied Biotechnology
- Accession number :
- edsair.doi.dedup.....47a64fe85170929263ff9a2177632fa2