Genetic analysis of drought tolerance in maize inbred lines: preliminary results
Drought stress causes significant yield reduction in maize Zea mays L. grown in sub-Saharan Africa (SSA. An understanding of the inheritance of drought tolerance would be useful in developing drought tolerant hybrids. The objectives of this study were to determine (i) the effects of the level of dro...
| Autores principales: | , , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés Francés |
| Publicado: |
2007
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/91427 |
| _version_ | 1855537153124073472 |
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| author | Meseka, S.K. Menkir, A. Ibrahim, A. |
| author_browse | Ibrahim, A. Menkir, A. Meseka, S.K. |
| author_facet | Meseka, S.K. Menkir, A. Ibrahim, A. |
| author_sort | Meseka, S.K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Drought stress causes significant yield reduction in maize Zea mays L. grown in sub-Saharan Africa (SSA. An understanding of the inheritance of drought tolerance would be useful in developing drought tolerant hybrids. The objectives of this study were to determine (i) the effects of the level of drought tolerance in parental inbred lines on the performance of their hybrids, (ii) mode of inheritance of drought tolerance in inbred lines selected for contrasting responses to drought, and (iii) relationship between per se performance of the parental lines and their hybrids. A Design ll mating scheme was used to produce96 single-cross hybrids from 24 inbred lines. The parental lines and F1 hybrids were evaluated in separate trials laid out side by side at lkenne, Nigeria in 2002. Both general (GCA and specific (SCA combining abilities were significant (P < 0.01), with GCA accounting for >50% of total variation for all traits except ears per plant under well-watered conditions. These results indicated that additive genetic effects largely influenced grain yield and other traits of the hybrids when evaluated under water stress. Most of the crosses with at least one tolerant parent produced tolerant hybrids, whereas most of the crosses involving two susceptible lines produced susceptible hybrids. Mid-parent values of inbred lines per-se were useful predictors of hybrid performance for all traits except ear aspect scores. Inbred lines KU1409,1824,9006,4001, POP10, and (TZI21501xKU1414x501) could be used as parents for developing drought tolerant maize hybrids. Results of this study led to the conclusion that yield improvement in drought tolerant maize is associated with the level of drought tolerance in parental lines. |
| format | Conference Paper |
| id | CGSpace91427 |
| institution | CGIAR Consortium |
| language | Inglés Francés |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| record_format | dspace |
| spelling | CGSpace914272023-06-08T20:32:46Z Genetic analysis of drought tolerance in maize inbred lines: preliminary results Meseka, S.K. Menkir, A. Ibrahim, A. maize hybrid inbred lines yield yield improvement gender Drought stress causes significant yield reduction in maize Zea mays L. grown in sub-Saharan Africa (SSA. An understanding of the inheritance of drought tolerance would be useful in developing drought tolerant hybrids. The objectives of this study were to determine (i) the effects of the level of drought tolerance in parental inbred lines on the performance of their hybrids, (ii) mode of inheritance of drought tolerance in inbred lines selected for contrasting responses to drought, and (iii) relationship between per se performance of the parental lines and their hybrids. A Design ll mating scheme was used to produce96 single-cross hybrids from 24 inbred lines. The parental lines and F1 hybrids were evaluated in separate trials laid out side by side at lkenne, Nigeria in 2002. Both general (GCA and specific (SCA combining abilities were significant (P < 0.01), with GCA accounting for >50% of total variation for all traits except ears per plant under well-watered conditions. These results indicated that additive genetic effects largely influenced grain yield and other traits of the hybrids when evaluated under water stress. Most of the crosses with at least one tolerant parent produced tolerant hybrids, whereas most of the crosses involving two susceptible lines produced susceptible hybrids. Mid-parent values of inbred lines per-se were useful predictors of hybrid performance for all traits except ear aspect scores. Inbred lines KU1409,1824,9006,4001, POP10, and (TZI21501xKU1414x501) could be used as parents for developing drought tolerant maize hybrids. Results of this study led to the conclusion that yield improvement in drought tolerant maize is associated with the level of drought tolerance in parental lines. La sdcheresse est un stress qui cause une r6duction significative derendement chez le mdis Zeo moys L) en Afrique sub-Saharienne(AS9. La compr6hension du mode de transmission de la tol6rancei la sdcheresse serait utile pour la cr6ation d'hybrides tolfrants d las6cheresse. Les obiectifs de cette 6tude €taient de determiner (i) leseffets du niveau de la tolerance d la s6cheresse des ligndes parentalesITsur la performance de leurs hybrides, (ii) mode de transmission dela tolerence i la s6cheresse dans les ligrr6es s€lectionn6es pour desr€ponses contrast6es i la s6cheresse. et (iii) les rapports entre laperformance intrinsEque des parents et leurs hybrides. Un schemade croisements d6nomm€ 'Design ll' a 6te utilise pour produire 96hybrides i partir de 24lign6es. Les lignees parentales et les hybridesrt ont et6 evalu€s dans des essais s6par6s mis en place cote ).cote ilkenne, au Nig6ria en 2002. Les aptitudes 96n6rales i la combinaison(AGO et specifiques b la combinaison (ASO etaient significatives (p <0.01), avec AGC comptant pour plus que 500/o de la variation totalepour tous les caractdres, a l'exception des 6pis par plant en conditionsd'arrosage. Les effets gen6tiques additifs ont largement influenc6s lerendement grain et les autres caractEres chez les hybrides de maissous le stress de la s6cheresse. La plupart des croisements avec aumoins un parent toleranL a produit des hybrides tol6rants, tandisque la plupart des croisements entre des lignees susceptibles ontg6n6r6 des hybrides susceptibles. Les valeurs moyennes parentalesdes lignees 6taient utiles pour la pr6diction de la performance deleurs hybrides pour tous les caractcres, a l'exception du score del'aspect des 6pis. Les lignees KU1409' 1824,9006, 4001, POP10 ettTZlsOlxKU'1414x501) pourraient €tre utilises comme parents pourcr6er des hybrides tol6rants i la s6cheresse. Les r6sultats de cette 6tuderevElent qUe l'am6lioration du rendement grain dans le mals tol6rant ila secheresse est associ€e au niveau de tol6rance i la sdcheresse dansles lign6es Parentales. 2007 2018-03-07T11:25:53Z 2018-03-07T11:25:53Z Conference Paper https://hdl.handle.net/10568/91427 en fr Limited Access Meseka, S.K., Menkir, A. & Ibrahim, A. (2007). Genetic analysis of drought tolerance in maize inbred lines: preliminary results, Demand-driven technologies for sustainable maize production in West and Central Africa: Proceedings of the fifth Biennial West and Central Africa Regional Maize Workshop, (p. 43-52), Cotonou, 3-6 May, 2005. Ibadan: IITA. |
| spellingShingle | maize hybrid inbred lines yield yield improvement gender Meseka, S.K. Menkir, A. Ibrahim, A. Genetic analysis of drought tolerance in maize inbred lines: preliminary results |
| title | Genetic analysis of drought tolerance in maize inbred lines: preliminary results |
| title_full | Genetic analysis of drought tolerance in maize inbred lines: preliminary results |
| title_fullStr | Genetic analysis of drought tolerance in maize inbred lines: preliminary results |
| title_full_unstemmed | Genetic analysis of drought tolerance in maize inbred lines: preliminary results |
| title_short | Genetic analysis of drought tolerance in maize inbred lines: preliminary results |
| title_sort | genetic analysis of drought tolerance in maize inbred lines preliminary results |
| topic | maize hybrid inbred lines yield yield improvement gender |
| url | https://hdl.handle.net/10568/91427 |
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