Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo
Twelve corn inbreeds contrasting in P use efficiency available at CIMMYT collection of CIAT, Colombia were studied. The inbreeds and their diallel crosses were evaluated under 2 P levels (4 and 15 ppm) using the alpha lattice design. The genetic design was performed according to Hallauer and Miranda...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Español |
| Publicado: |
2008
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| Acceso en línea: | https://hdl.handle.net/10568/44334 |
| _version_ | 1855541127989428224 |
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| author | Salazar Villareal, Fredy Antonio Narro Leon, LA Vallejo Cabrera, Franco Alirio |
| author_browse | Narro Leon, LA Salazar Villareal, Fredy Antonio Vallejo Cabrera, Franco Alirio |
| author_facet | Salazar Villareal, Fredy Antonio Narro Leon, LA Vallejo Cabrera, Franco Alirio |
| author_sort | Salazar Villareal, Fredy Antonio |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Twelve corn inbreeds contrasting in P use efficiency available at CIMMYT collection of CIAT, Colombia were studied. The inbreeds and their diallel crosses were evaluated under 2 P levels (4 and 15 ppm) using the alpha lattice design. The genetic design was performed according to Hallauer and Miranda (1986). Highly significant differences were found among parents (P), crosses (C) and P vs C in both environments (low and high P levels). At low P, crosses sum of squares (SS) accounted for 66% of genotype SS while at high P, P vs C accounted for 58% of genotype SS, meaning that heterosis was more important at high P. At low P, significant differences were found for tolerant (T) parents vs susceptible ones (S). Crosses among TxT, SxS and TxS parents were different, suggesting a polygenic inheritance for this trait. General (GCA) and specific combining ability (SCA) were highly significant at low and high P but SCA was 3 fold the GCA, meaning that no additive gene effects were more important for P use efficiency. |
| format | Journal Article |
| id | CGSpace44334 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| record_format | dspace |
| spelling | CGSpace443342025-05-28T14:52:21Z Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo General and specific combining ability of efficient corn inbreeds to low phosphorus Salazar Villareal, Fredy Antonio Narro Leon, LA Vallejo Cabrera, Franco Alirio maize zea mays combining ability acid soils maíz aptitud combinatoria suelo ácido Twelve corn inbreeds contrasting in P use efficiency available at CIMMYT collection of CIAT, Colombia were studied. The inbreeds and their diallel crosses were evaluated under 2 P levels (4 and 15 ppm) using the alpha lattice design. The genetic design was performed according to Hallauer and Miranda (1986). Highly significant differences were found among parents (P), crosses (C) and P vs C in both environments (low and high P levels). At low P, crosses sum of squares (SS) accounted for 66% of genotype SS while at high P, P vs C accounted for 58% of genotype SS, meaning that heterosis was more important at high P. At low P, significant differences were found for tolerant (T) parents vs susceptible ones (S). Crosses among TxT, SxS and TxS parents were different, suggesting a polygenic inheritance for this trait. General (GCA) and specific combining ability (SCA) were highly significant at low and high P but SCA was 3 fold the GCA, meaning that no additive gene effects were more important for P use efficiency. Los cruzamientos dialelos de 12 padres contrastantes en la toma y uso de fósforo se evaluaron en dos niveles de fósforo (4 y 15 ppm) usando un dise o experimental de alpha lattice con tres repeticiones. Se usó el dise o genético propuesto por Hallauer y Miranda. En bajo y alto fósforo se encontraron diferencias altamente significativas entre los genotipos, i.e. cruzamientos (C), padres (P) y PvsC. En alto fósforo, PvsC explicaron 58% de la suma de cuadrados de los genotipos y los cruzamientos 66% en bajo fósforo. En bajo fósforo se encontraron diferencias altamente significativas para el contraste de tolerantes (T) vs susceptibles (S). Los cruzamientos de padres TxT, SxS y TxS fueron estadísticamente diferentes, lo que sugirió que el carácter es poligénico. HCG y HCE fueron altamente significativas en los dos ambientes y HCE fue tres veces más grande, lo que sugirió que en la tolerancia a bajo fósforo son más importantes los efectos genéticos no aditivos. 2008 2014-10-02T08:33:36Z 2014-10-02T08:33:36Z Journal Article https://hdl.handle.net/10568/44334 es Open Access |
| spellingShingle | maize zea mays combining ability acid soils maíz aptitud combinatoria suelo ácido Salazar Villareal, Fredy Antonio Narro Leon, LA Vallejo Cabrera, Franco Alirio Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo |
| title | Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo |
| title_full | Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo |
| title_fullStr | Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo |
| title_full_unstemmed | Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo |
| title_short | Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo |
| title_sort | habilidad combinatoria general y especifica de lineas endogamicas de maiz tolerantes a bajo fosforo |
| topic | maize zea mays combining ability acid soils maíz aptitud combinatoria suelo ácido |
| url | https://hdl.handle.net/10568/44334 |
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