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| Format: | Artículo científico |
| Language: | en |
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Universidade Estadual de Maringá
2014
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| Online Access: | https://www.redalyc.org/articulo.oa?id=187130419010 |
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Table of Contents:
- Intra-inflorescence pollen viability in accessions of Brachiaria ruziziensis Cristina Maria Pinto de Paula Vânia Helena Techio Flávio Rodrigo Gandolfi Benites Fausto de Souza Sobrinho Biología Fertility pollen grain forage grass forage breeding Knowledge about the pollen viability is important to ensure success in controlled hybridizations and, consequently, su pport breeding programs. The aims of this study were to evaluate the pollen viability in progenies of artificially induced tetraploid accessions of Brachiaria ruziziensis , and to verify if the position of the flower buds on the raceme a ffects the pollen viability rate. Staining of aborted and non-aborted pollen (Alexander’s tech nique) was used to determine the viability of the pollen grains. Tetraploid accessions of B. ruziziensis plants had high pollen viability (x = 76.8% to x = 99.6%). Some of these plants had viability rates similar to diploid B. ruziziensis , showing that the induction of chromosome duplication by colchicine did not result in abnorma lities in production and morphology of pollen grains. Pollen grains from middle and apical regions of the raceme presented higher viability rates (x = 97.9% and x = 97.7% respectively). The viability of pollen grains in artificially induced tetraploid accessions of B. ruziziensis plants was high, which may favor obtaining fe rtile descendants in possible crosses. 2014 artículo científico 1679-9283 https://www.redalyc.org/articulo.oa?id=187130419010 en http://www.redalyc.org/revista.oa?id=1871 Acta Scientiarum. Biological Sciences application/pdf Universidade Estadual de Maringá Acta Scientiarum. Biological Sciences (Brasil) Num.2 Vol.36