Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya

Drought and poor soil fertility are among the major abiotic stresses affecting maize productivity in sub-Saharan Africa. Maize breeding efforts at the International Maize and Wheat Improvement Center (CIMMYT) have focused on incorporating drought stress tolerance and nitrogen-use efficiency (NUE) in...

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Autores: Tadesse, B., Beyene, Y., Das, B., Mugo, S.N., Olsen, M., Oikeh, S.O., Juma, C., Labuschagne, M., Prasanna, B.M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:México
Institución:Centro Internacional de Mejoramiento de Maíz y Trigo
Repositorio:Repositorio Institucional de Publicaciones Multimedia del CIMMYT
OAI Identifier:oai:repository.cimmyt.org:10883/18875
Acceso en línea:http://hdl.handle.net/10883/18875
Access Level:acceso abierto
Palabra clave:AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Variance
Nitrogen Use Efficiency
DROUGHT TOLERANCE
NITROGEN
NUTRIENT USE EFFICIENCY
HERITABILITY
STABILITY
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spelling Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in KenyaTadesse, B.Beyene, Y.Das, B.Mugo, S.N.Olsen, M.Oikeh, S.O.Juma, C.Labuschagne, M.Prasanna, B.M.AGRICULTURAL SCIENCES AND BIOTECHNOLOGYVarianceNitrogen Use EfficiencyDROUGHT TOLERANCENITROGENNUTRIENT USE EFFICIENCYHERITABILITYSTABILITYDrought and poor soil fertility are among the major abiotic stresses affecting maize productivity in sub-Saharan Africa. Maize breeding efforts at the International Maize and Wheat Improvement Center (CIMMYT) have focused on incorporating drought stress tolerance and nitrogen-use efficiency (NUE) into tropical maize germplasm. The objectives of this study were to estimate the general combining ability (GCA) and specific combining ability (SCA) of selected maize inbred lines under drought stress (DS), low-nitrogen (LN) and optimum moisture and nitrogen (optimum) conditions, and to assess the yield potential and stability of experimental hybrids under these management conditions. Forty-nine experimental three-way cross hybrids, generated from a 7 × 7 line by tester crosses, and six commercial checks were evaluated across 11 optimum, DS and LN sites in Kenya in 2014 using an alpha lattice design with two replicates per entry at each site. DS reduced both grain yield (GY) and plant height (PH), while anthesis–silking interval (ASI) increased under both DS and LN. Hybrids ‘L4/T2’ and ‘L4/T1’ were found to be superior and stable, while inbreds ‘L4’ and ‘L6’ were good combiners for GY and other secondary traits across sites. Additive variance played a greater role for most traits under the three management conditions, suggesting that further progress in the improvement of these traits should be possible. GY under optimum conditions was positively correlated with GY under both DS and LN conditions, but GY under DS and LN was not correlated. Our results suggest the feasibility for simultaneous improvement in grain yield performance of genotypes under optimum, DS and LN conditions.pages 197-205Blackwell Verlag2017-08-23T15:41:24Z2017-08-23T15:41:24Z2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePDFapplication/pdfhttp://hdl.handle.net/10883/1887510.1111/pbr.124642v. 136Plant Breedingreponame:Repositorio Institucional de Publicaciones Multimedia del CIMMYTinstname:Centro Internacional de Mejoramiento de Maíz y Trigoinstacron:CIMMYTEnglishSUB SAHARAN AFRICABerlin, GermanyCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.Open Accessinfo:eu-repo/semantics/openAccessoai:repository.cimmyt.org:10883/188752024-10-11T19:57:34Z
dc.title.none.fl_str_mv Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
title Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
spellingShingle Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
Tadesse, B.
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Variance
Nitrogen Use Efficiency
DROUGHT TOLERANCE
NITROGEN
NUTRIENT USE EFFICIENCY
HERITABILITY
STABILITY
title_short Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
title_full Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
title_fullStr Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
title_full_unstemmed Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
title_sort Combining ability and testcross performance of drought-tolerant maize inbred lines under stress and non-stress environments in Kenya
dc.creator.none.fl_str_mv Tadesse, B.
Beyene, Y.
Das, B.
Mugo, S.N.
Olsen, M.
Oikeh, S.O.
Juma, C.
Labuschagne, M.
Prasanna, B.M.
author Tadesse, B.
author_facet Tadesse, B.
Beyene, Y.
Das, B.
Mugo, S.N.
Olsen, M.
Oikeh, S.O.
Juma, C.
Labuschagne, M.
Prasanna, B.M.
author_role author
author2 Beyene, Y.
Das, B.
Mugo, S.N.
Olsen, M.
Oikeh, S.O.
Juma, C.
Labuschagne, M.
Prasanna, B.M.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Variance
Nitrogen Use Efficiency
DROUGHT TOLERANCE
NITROGEN
NUTRIENT USE EFFICIENCY
HERITABILITY
STABILITY
topic AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Variance
Nitrogen Use Efficiency
DROUGHT TOLERANCE
NITROGEN
NUTRIENT USE EFFICIENCY
HERITABILITY
STABILITY
description Drought and poor soil fertility are among the major abiotic stresses affecting maize productivity in sub-Saharan Africa. Maize breeding efforts at the International Maize and Wheat Improvement Center (CIMMYT) have focused on incorporating drought stress tolerance and nitrogen-use efficiency (NUE) into tropical maize germplasm. The objectives of this study were to estimate the general combining ability (GCA) and specific combining ability (SCA) of selected maize inbred lines under drought stress (DS), low-nitrogen (LN) and optimum moisture and nitrogen (optimum) conditions, and to assess the yield potential and stability of experimental hybrids under these management conditions. Forty-nine experimental three-way cross hybrids, generated from a 7 × 7 line by tester crosses, and six commercial checks were evaluated across 11 optimum, DS and LN sites in Kenya in 2014 using an alpha lattice design with two replicates per entry at each site. DS reduced both grain yield (GY) and plant height (PH), while anthesis–silking interval (ASI) increased under both DS and LN. Hybrids ‘L4/T2’ and ‘L4/T1’ were found to be superior and stable, while inbreds ‘L4’ and ‘L6’ were good combiners for GY and other secondary traits across sites. Additive variance played a greater role for most traits under the three management conditions, suggesting that further progress in the improvement of these traits should be possible. GY under optimum conditions was positively correlated with GY under both DS and LN conditions, but GY under DS and LN was not correlated. Our results suggest the feasibility for simultaneous improvement in grain yield performance of genotypes under optimum, DS and LN conditions.
publishDate 2017
dc.date.none.fl_str_mv 2017-08-23T15:41:24Z
2017-08-23T15:41:24Z
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10883/18875
10.1111/pbr.12464
url http://hdl.handle.net/10883/18875
identifier_str_mv 10.1111/pbr.12464
dc.language.none.fl_str_mv English
language_invalid_str_mv English
dc.rights.none.fl_str_mv Open Access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Open Access
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv PDF
application/pdf
dc.coverage.none.fl_str_mv SUB SAHARAN AFRICA
Berlin, Germany
dc.publisher.none.fl_str_mv Blackwell Verlag
publisher.none.fl_str_mv Blackwell Verlag
dc.source.none.fl_str_mv 2
v. 136
Plant Breeding
reponame:Repositorio Institucional de Publicaciones Multimedia del CIMMYT
instname:Centro Internacional de Mejoramiento de Maíz y Trigo
instacron:CIMMYT
instname_str Centro Internacional de Mejoramiento de Maíz y Trigo
instacron_str CIMMYT
institution CIMMYT
reponame_str Repositorio Institucional de Publicaciones Multimedia del CIMMYT
collection Repositorio Institucional de Publicaciones Multimedia del CIMMYT
repository.name.fl_str_mv
repository.mail.fl_str_mv
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