Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes
Aluminum (Al) toxicity is the principal abiotic constraint in acid soils of the tropics. Common bean, meanwhile, is for the most part very sensitive to this stress although certain genotypes within the species show some level of resistance, justifying screening of germplasm from both the Andean and...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
FapUNIFESP
2009
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/42947 |
| _version_ | 1855526436317691904 |
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| author | Blair, Matthew W. López Marin, H.D. Rao, Idupulapati M. |
| author_browse | Blair, Matthew W. López Marin, H.D. Rao, Idupulapati M. |
| author_facet | Blair, Matthew W. López Marin, H.D. Rao, Idupulapati M. |
| author_sort | Blair, Matthew W. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Aluminum (Al) toxicity is the principal abiotic constraint in acid soils of the tropics. Common bean, meanwhile, is for the most part
very sensitive to this stress although certain genotypes within the species show some level of resistance, justifying screening of
germplasm from both the Andean and Mesoamerican genepools to identify better performing sources. The objective of this study was
to evaluate 36 genotypes of common bean under hydroponic conditions to identify root morphological traits that could be associated
with Al resistance. A total of five root traits (elongation rate of the primary root, total root length, root biomass, average root diameter
and specific root length) were measured using a simple nutrient solution with or without Al (20 ?M) over a 48 hour growth period
with the experiments conducted in five replicates. We found that genotypes from the Andean gene pool were more resistant to Al
than Mesoamerican genotypes under these conditions, based on a smaller decrease in the elongation rate of the primary root, total
root length, specific root length and a lesser increase in root diameter in the presence of Al in nutrient solution. These root traits but
not root biomass can serve as selection criteria to distinguish between Al-resistant and Al-sensitive genotypes. |
| format | Journal Article |
| id | CGSpace42947 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2009 |
| publishDateRange | 2009 |
| publishDateSort | 2009 |
| publisher | FapUNIFESP |
| publisherStr | FapUNIFESP |
| record_format | dspace |
| spelling | CGSpace429472024-11-15T08:52:34Z Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes Blair, Matthew W. López Marin, H.D. Rao, Idupulapati M. phaseolus vulgaris stress acid soils aluminium gene pools estres suelo ácido aluminio reserva genéticas Aluminum (Al) toxicity is the principal abiotic constraint in acid soils of the tropics. Common bean, meanwhile, is for the most part very sensitive to this stress although certain genotypes within the species show some level of resistance, justifying screening of germplasm from both the Andean and Mesoamerican genepools to identify better performing sources. The objective of this study was to evaluate 36 genotypes of common bean under hydroponic conditions to identify root morphological traits that could be associated with Al resistance. A total of five root traits (elongation rate of the primary root, total root length, root biomass, average root diameter and specific root length) were measured using a simple nutrient solution with or without Al (20 ?M) over a 48 hour growth period with the experiments conducted in five replicates. We found that genotypes from the Andean gene pool were more resistant to Al than Mesoamerican genotypes under these conditions, based on a smaller decrease in the elongation rate of the primary root, total root length, specific root length and a lesser increase in root diameter in the presence of Al in nutrient solution. These root traits but not root biomass can serve as selection criteria to distinguish between Al-resistant and Al-sensitive genotypes. 2009 2014-09-24T07:58:49Z 2014-09-24T07:58:49Z Journal Article https://hdl.handle.net/10568/42947 en Open Access FapUNIFESP |
| spellingShingle | phaseolus vulgaris stress acid soils aluminium gene pools estres suelo ácido aluminio reserva genéticas Blair, Matthew W. López Marin, H.D. Rao, Idupulapati M. Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes |
| title | Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes |
| title_full | Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes |
| title_fullStr | Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes |
| title_full_unstemmed | Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes |
| title_short | Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes |
| title_sort | identification of aluminum resistant andean common bean phaseolus vulgaris l genotypes |
| topic | phaseolus vulgaris stress acid soils aluminium gene pools estres suelo ácido aluminio reserva genéticas |
| url | https://hdl.handle.net/10568/42947 |
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