Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly
Understanding functional relations among plant traits and their modulation by growing conditions is imperative in designing selection strategies for breeding programs. This study assessed trait relationships among 196 common bean genotypes exposed to stresses for drought and field infestation of bea...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2015
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/67074 |
| _version_ | 1855518251366219776 |
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| author | Ambachew, Daniel Mekbib, Firew Asfaw, A. Beebe, Stephen E. Blair, Matthew W. |
| author_browse | Ambachew, Daniel Asfaw, A. Beebe, Stephen E. Blair, Matthew W. Mekbib, Firew |
| author_facet | Ambachew, Daniel Mekbib, Firew Asfaw, A. Beebe, Stephen E. Blair, Matthew W. |
| author_sort | Ambachew, Daniel |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Understanding functional relations among plant traits and their modulation by growing conditions is imperative in designing selection strategies for breeding programs. This study assessed trait relationships among 196 common bean genotypes exposed to stresses for drought and field infestation of bean fly or bean stem maggot (BSM). The study was carried out at two locations and data was analyzed with linear correlation, path coefficient and genotype × trait biplot analyses. Multiple trait data related to mechanisms of drought and bean fly tolerance were collected on 196 genotypes grown under i) water deficit at mid-pod fill, or ii) unprotected against bean fly; iii) irrigated, well watered conditions, or iv) bean fly protection with chemicals. Seed yield exhibited positive and significant correlations with leaf chlorophyll content, vertical root pulling resistance, pod harvest index, pods per plant and seeds per pod at both phenotypic and genotypic levels under stress and non-stress conditions. Genotypic correlations of traits with seed yield were greater than their respective phenotypic correlations across environments indicating the greater contribution of genotypic factors to the trait correlation. Pods per plant and seeds per pod had high positive direct effects on seed yield both under stress and non-stress whereas pods per plant had the highest indirect effect on seed yield through pod harvest index under stress. In general, our results suggest that vertical root pulling resistance and pod harvest index are important selection objectives for improving seed yield in common beans under non-stress and stress conditions, and particularly useful for drought and BSM tolerance evaluation. |
| format | Journal Article |
| id | CGSpace67074 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace670742025-09-25T13:01:37Z Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly Ambachew, Daniel Mekbib, Firew Asfaw, A. Beebe, Stephen E. Blair, Matthew W. phaseolus vulgaris genotypes plant breeding yield pest control chemical control drought stress genotipos fitomejoramiento rendimiento control de plagas control químico estrés de sequia etíopia Understanding functional relations among plant traits and their modulation by growing conditions is imperative in designing selection strategies for breeding programs. This study assessed trait relationships among 196 common bean genotypes exposed to stresses for drought and field infestation of bean fly or bean stem maggot (BSM). The study was carried out at two locations and data was analyzed with linear correlation, path coefficient and genotype × trait biplot analyses. Multiple trait data related to mechanisms of drought and bean fly tolerance were collected on 196 genotypes grown under i) water deficit at mid-pod fill, or ii) unprotected against bean fly; iii) irrigated, well watered conditions, or iv) bean fly protection with chemicals. Seed yield exhibited positive and significant correlations with leaf chlorophyll content, vertical root pulling resistance, pod harvest index, pods per plant and seeds per pod at both phenotypic and genotypic levels under stress and non-stress conditions. Genotypic correlations of traits with seed yield were greater than their respective phenotypic correlations across environments indicating the greater contribution of genotypic factors to the trait correlation. Pods per plant and seeds per pod had high positive direct effects on seed yield both under stress and non-stress whereas pods per plant had the highest indirect effect on seed yield through pod harvest index under stress. In general, our results suggest that vertical root pulling resistance and pod harvest index are important selection objectives for improving seed yield in common beans under non-stress and stress conditions, and particularly useful for drought and BSM tolerance evaluation. 2015-08 2015-06-16T14:07:36Z 2015-06-16T14:07:36Z Journal Article https://hdl.handle.net/10568/67074 en Open Access Elsevier Ambachew, Daniel; Mekbib, Firew; Asfaw, Asrat; Beebe, Stephen E.; Blair, Matthew W.. 2015. Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly. Crop Journal . 3(4): 305-316. |
| spellingShingle | phaseolus vulgaris genotypes plant breeding yield pest control chemical control drought stress genotipos fitomejoramiento rendimiento control de plagas control químico estrés de sequia etíopia Ambachew, Daniel Mekbib, Firew Asfaw, A. Beebe, Stephen E. Blair, Matthew W. Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly |
| title | Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly |
| title_full | Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly |
| title_fullStr | Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly |
| title_full_unstemmed | Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly |
| title_short | Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly |
| title_sort | trait associations in common bean genotypes grown under drought stress and field infestation by bsm bean fly |
| topic | phaseolus vulgaris genotypes plant breeding yield pest control chemical control drought stress genotipos fitomejoramiento rendimiento control de plagas control químico estrés de sequia etíopia |
| url | https://hdl.handle.net/10568/67074 |
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