Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance

Smallholder maize farmers in Africa experience pre- and post-harvest production stresses either individually or in combination at different stages of the crop cycle. The maize weevil is among the major post-harvest storage pests. A strategy to address this problem is to develop and promote high yiel...

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Autores: Sserumaga, J.P., Makumbi, D., Oikeh, S.O., Otim, M., Machida, L., Bruce, A.Y., Nhamucho, E., Beyene, Y., Mugo, S.N.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
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:10883/20952
Acceso en línea:https://hdl.handle.net/10883/20952
Access Level:acceso abierto
Palabra clave:AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Maize Weevil
STRESS
MAIZE
CURCULIONIDAE
POSTHARVEST LOSSES
HERITABILITY
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spelling Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistanceSserumaga, J.P.Makumbi, D.Oikeh, S.O.Otim, M.Machida, L.Bruce, A.Y.Nhamucho, E.Beyene, Y.Mugo, S.N.AGRICULTURAL SCIENCES AND BIOTECHNOLOGYMaize WeevilSTRESSMAIZECURCULIONIDAEPOSTHARVEST LOSSESHERITABILITYSmallholder maize farmers in Africa experience pre- and post-harvest production stresses either individually or in combination at different stages of the crop cycle. The maize weevil is among the major post-harvest storage pests. A strategy to address this problem is to develop and promote high yielding maize germplasm with resistance to multiple stresses. A study was conducted to: 1) assess yield and agronomic performance of testcross hybrids developed from early generation lines; and 2) assess the response of the testcross hybrids to infestation with Sitophilus zeamais. Fifty-eight drought-tolerant testcross hybrids were evaluated for agronomic performance and weevil resistance at four environments in Uganda in 2016. Hybrid G39 (L2/T2) had the best grain yield performance; it significantly out-performed the best check by 11.4% in all environments. Hybrid grain from field trials was subjected to Sitophilus zeamais infestation in a choice and no choice test under laboratory conditions. Hybrids G56 (L49/T2) and G58 (L51/T2) had the least weevil damage and were rated as resistant to Sitophilus zeamais. The numbers of damaged kernels, number of exit holes and ear aspect were positively correlated with the grain weight loss. The results suggest possibilities for simultaneous selection for high grain yield and storage insect pest resistance among drought-tolerant genotypes. Use of high-yielding and resistant maize hybrids to storage insect pest should be promoted for increased maize production and managing post-harvest losses due to the maize weevil in smallholder farming communities in Africa.Elsevier2020-09-29T00:05:14Z2020-09-29T00:05:14Z2021Published Versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePDFapplication/pdfhttps://hdl.handle.net/10883/2095210.1016/j.cropro.2020.105384139Crop Protectionreponame:Repositorio Institucional de Publicaciones Multimedia del CIMMYTinstname:Centro Internacional de Mejoramiento de Maíz y Trigoinstacron:CIMMYTEnglishhttps://www.sciencedirect.com/science/article/pii/S0261219420303173?via%3Dihub#appsec1Haywards Heath (United Kingdom)CIMMYT 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 purposeOpen Accessinfo:eu-repo/semantics/openAccessoai:repository.cimmyt.org:10883/209522024-10-11T19:56:04Z
dc.title.none.fl_str_mv Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
title Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
spellingShingle Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
Sserumaga, J.P.
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Maize Weevil
STRESS
MAIZE
CURCULIONIDAE
POSTHARVEST LOSSES
HERITABILITY
title_short Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
title_full Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
title_fullStr Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
title_full_unstemmed Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
title_sort Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance
dc.creator.none.fl_str_mv Sserumaga, J.P.
Makumbi, D.
Oikeh, S.O.
Otim, M.
Machida, L.
Bruce, A.Y.
Nhamucho, E.
Beyene, Y.
Mugo, S.N.
author Sserumaga, J.P.
author_facet Sserumaga, J.P.
Makumbi, D.
Oikeh, S.O.
Otim, M.
Machida, L.
Bruce, A.Y.
Nhamucho, E.
Beyene, Y.
Mugo, S.N.
author_role author
author2 Makumbi, D.
Oikeh, S.O.
Otim, M.
Machida, L.
Bruce, A.Y.
Nhamucho, E.
Beyene, Y.
Mugo, S.N.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Maize Weevil
STRESS
MAIZE
CURCULIONIDAE
POSTHARVEST LOSSES
HERITABILITY
topic AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Maize Weevil
STRESS
MAIZE
CURCULIONIDAE
POSTHARVEST LOSSES
HERITABILITY
description Smallholder maize farmers in Africa experience pre- and post-harvest production stresses either individually or in combination at different stages of the crop cycle. The maize weevil is among the major post-harvest storage pests. A strategy to address this problem is to develop and promote high yielding maize germplasm with resistance to multiple stresses. A study was conducted to: 1) assess yield and agronomic performance of testcross hybrids developed from early generation lines; and 2) assess the response of the testcross hybrids to infestation with Sitophilus zeamais. Fifty-eight drought-tolerant testcross hybrids were evaluated for agronomic performance and weevil resistance at four environments in Uganda in 2016. Hybrid G39 (L2/T2) had the best grain yield performance; it significantly out-performed the best check by 11.4% in all environments. Hybrid grain from field trials was subjected to Sitophilus zeamais infestation in a choice and no choice test under laboratory conditions. Hybrids G56 (L49/T2) and G58 (L51/T2) had the least weevil damage and were rated as resistant to Sitophilus zeamais. The numbers of damaged kernels, number of exit holes and ear aspect were positively correlated with the grain weight loss. The results suggest possibilities for simultaneous selection for high grain yield and storage insect pest resistance among drought-tolerant genotypes. Use of high-yielding and resistant maize hybrids to storage insect pest should be promoted for increased maize production and managing post-harvest losses due to the maize weevil in smallholder farming communities in Africa.
publishDate 2020
dc.date.none.fl_str_mv 2020-09-29T00:05:14Z
2020-09-29T00:05:14Z
2021
dc.type.none.fl_str_mv Published Version
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/10883/20952
10.1016/j.cropro.2020.105384
url https://hdl.handle.net/10883/20952
identifier_str_mv 10.1016/j.cropro.2020.105384
dc.language.none.fl_str_mv English
language_invalid_str_mv English
dc.relation.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S0261219420303173?via%3Dihub#appsec1
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 Haywards Heath (United Kingdom)
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv 139
Crop Protection
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
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repository.mail.fl_str_mv
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