Epistasis in cassava adapted to midaltitude valley environments
Little is known about the inheritance of agronomic traits in cassava (Manihot esculenta Crantz). The vegetative multiplication of cassava allows cloning of individual genotypes, and separates environmental from genetic variation in the within-family variation. Knowing the magnitude of between- and w...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
2005
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/43413 |
| _version_ | 1855518248393506816 |
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| author | Pérez Velásquez, Juan Carlos Ceballos, H. Jaramillo, Gustavo Morante, N Calle, F. Arias, B. Bellotti, Anthony C. |
| author_browse | Arias, B. Bellotti, Anthony C. Calle, F. Ceballos, H. Jaramillo, Gustavo Morante, N Pérez Velásquez, Juan Carlos |
| author_facet | Pérez Velásquez, Juan Carlos Ceballos, H. Jaramillo, Gustavo Morante, N Calle, F. Arias, B. Bellotti, Anthony C. |
| author_sort | Pérez Velásquez, Juan Carlos |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Little is known about the inheritance of agronomic traits in cassava (Manihot esculenta Crantz). The vegetative multiplication of cassava allows cloning of individual genotypes, and separates environmental from genetic variation in the within-family variation. Knowing the magnitude of between- and within-family variation is important for defining breeding strategies and for measuring different components of genetic variances, particularly the seldom-estimated epistasis. A group of nine genotypes, adapted to midaltitude environments, was used for a diallel study. Thirty clones were obtained from every F1 cross (each clone was represented by six plants), and planted in three replications at two locations. Statistical differences among crosses were found for fresh-root yield, harvest index, root dry-matter content, and reaction to mites (Mononychellus tanajoa Bondar) and to whiteflies (Aleurotrachelus socialis Bondar). General combining ability (GCA) was significant for all traits except fresh-root yield and dry-matter content, and specific combining ability (SCA) was significant for all traits except whitefly damage score. Fresh-root yield was the only trait with significant epistatic effects, which, combined with a large dominance variance, suggested a prevalence of nonadditive effects. The introduction of inbreeding would be one approach for the efficient exploitation of these nonadditive effects found for fresh-root yield. For the remaining traits, epistasis was negligible and current schemes exploiting additive effects may suffice. |
| format | Journal Article |
| id | CGSpace43413 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2005 |
| publishDateRange | 2005 |
| publishDateSort | 2005 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace434132024-08-27T10:35:09Z Epistasis in cassava adapted to midaltitude valley environments Pérez Velásquez, Juan Carlos Ceballos, H. Jaramillo, Gustavo Morante, N Calle, F. Arias, B. Bellotti, Anthony C. manihot esculenta genetic variation diallel crossing gene interaction aleurotrachelus socialis mononychellus tanajoa variación genética cruzamiento dialelo interacción de genes Little is known about the inheritance of agronomic traits in cassava (Manihot esculenta Crantz). The vegetative multiplication of cassava allows cloning of individual genotypes, and separates environmental from genetic variation in the within-family variation. Knowing the magnitude of between- and within-family variation is important for defining breeding strategies and for measuring different components of genetic variances, particularly the seldom-estimated epistasis. A group of nine genotypes, adapted to midaltitude environments, was used for a diallel study. Thirty clones were obtained from every F1 cross (each clone was represented by six plants), and planted in three replications at two locations. Statistical differences among crosses were found for fresh-root yield, harvest index, root dry-matter content, and reaction to mites (Mononychellus tanajoa Bondar) and to whiteflies (Aleurotrachelus socialis Bondar). General combining ability (GCA) was significant for all traits except fresh-root yield and dry-matter content, and specific combining ability (SCA) was significant for all traits except whitefly damage score. Fresh-root yield was the only trait with significant epistatic effects, which, combined with a large dominance variance, suggested a prevalence of nonadditive effects. The introduction of inbreeding would be one approach for the efficient exploitation of these nonadditive effects found for fresh-root yield. For the remaining traits, epistasis was negligible and current schemes exploiting additive effects may suffice. 2005-07 2014-09-24T08:42:06Z 2014-09-24T08:42:06Z Journal Article https://hdl.handle.net/10568/43413 en Limited Access Wiley |
| spellingShingle | manihot esculenta genetic variation diallel crossing gene interaction aleurotrachelus socialis mononychellus tanajoa variación genética cruzamiento dialelo interacción de genes Pérez Velásquez, Juan Carlos Ceballos, H. Jaramillo, Gustavo Morante, N Calle, F. Arias, B. Bellotti, Anthony C. Epistasis in cassava adapted to midaltitude valley environments |
| title | Epistasis in cassava adapted to midaltitude valley environments |
| title_full | Epistasis in cassava adapted to midaltitude valley environments |
| title_fullStr | Epistasis in cassava adapted to midaltitude valley environments |
| title_full_unstemmed | Epistasis in cassava adapted to midaltitude valley environments |
| title_short | Epistasis in cassava adapted to midaltitude valley environments |
| title_sort | epistasis in cassava adapted to midaltitude valley environments |
| topic | manihot esculenta genetic variation diallel crossing gene interaction aleurotrachelus socialis mononychellus tanajoa variación genética cruzamiento dialelo interacción de genes |
| url | https://hdl.handle.net/10568/43413 |
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