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Reproductive analyses of intraspecific Paspalum notatum Flügge hybrids
- Source :
- Crop Breeding and Applied Biotechnology v.20 n.1 2020, Crop Breeding and Applied Biotechnology, Sociedade Brasileira de Melhoramento de Plantas, instacron:CBAB
- Publication Year :
- 2020
- Publisher :
- Crop Breeding and Applied Biotechnology, 2020.
-
Abstract
- Paspalum notatum is an important forage native to Southern Brazil and one of the most promising fodder species in terms of productivity, quality, resistance and growth speed. The objective of this study was to evaluate the reproductive mode and fertility of hybrid progenies resulting from artificial crosses among artificially duplicated sexual plants, selected intraspecific hybrids of the UFRGS breeding program and apomictic ecotypes of the species. The resulting F1 progenies were represented by 24 plants with high pollen viability (varying from 82.15 to 99.67%) and 1.2:1 segregation for the sexual: apomictic reproduction mode, indicating predominantly sexual hybrids, due to distorted segregation. In the apomictic plants, most chromosomes paired as bivalents in diakinesis. Since the low presence of abnormalities observed in the meiotic chromosome pairing and the high pollen viability of the hybrids, all plants were confirmed as promising parents for future crosses.
- Subjects :
- biology
Breeding program
food and beverages
Asexual reproduction
Reproduction mode
pollen viability
biology.organism_classification
medicine.disease_cause
Intraspecific competition
Sexual reproduction
meiotic behavior
Apomixis
Pollen
Botany
medicine
General Earth and Planetary Sciences
Agronomy and Crop Science
Paspalum notatum
Biotechnology
General Environmental Science
Hybrid
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Crop Breeding and Applied Biotechnology v.20 n.1 2020, Crop Breeding and Applied Biotechnology, Sociedade Brasileira de Melhoramento de Plantas, instacron:CBAB
- Accession number :
- edsair.doi.dedup.....622b65e9f4de600d7d1444c68a3c9aca