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

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cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationNational Livestock Resources Research Institute, Ugandaen
cg.contributor.affiliationInternational Maize and Wheat Improvement Centeren
cg.contributor.affiliationNational Crops Resources Research Institute, Ugandaen
cg.contributor.affiliationMozambique Agricultural Research Instituteen
cg.contributor.affiliationBioversity Internationalen
cg.contributor.crpMaize
cg.contributor.donorBill & Melinda Gates Foundationen
cg.contributor.donorHoward G. Buffett Foundationen
cg.contributor.donorUnited States Agency for International Developmenten
cg.coverage.countryUganda
cg.coverage.iso3166-alpha2UG
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.coverage.regionSub-Saharan Africa
cg.creator.identifierLewis Machida: 0000-0002-0012-3997
cg.identifier.doihttps://doi.org/10.1016/j.cropro.2020.105384en
cg.isijournalISI Journalen
cg.issn1873-6904en
cg.journalCrop Protectionen
cg.reviewStatusPeer Reviewen
cg.subject.alliancebiovciatPESTS AND DISEASESen
cg.volume139en
dc.contributor.authorSserumaga, Julius P.en
dc.contributor.authorMakumbi, Danen
dc.contributor.authorOikeh, Sylvester O.en
dc.contributor.authorOtim, Michaelen
dc.contributor.authorMachida, Lewisen
dc.contributor.authorAnani, Bruce Y.en
dc.contributor.authorNhamucho, Egasen
dc.contributor.authorBeyene, Yosephen
dc.contributor.authorMugo, Stephenen
dc.date.accessioned2021-01-11T14:11:41Zen
dc.date.available2021-01-11T14:11:41Zen
dc.identifier.urihttps://hdl.handle.net/10568/110819
dc.titleEvaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistanceen
dcterms.abstractSmallholder 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.en
dcterms.accessRightsOpen Access
dcterms.available2020-09-07
dcterms.bibliographicCitationSserumaga, J.P.; Makumbi, D.; Oikeh, S.O.; Otim, M.; Machida, L.; Anani, B.Y.; Nhamucho, E.; Beyene, Y.; Mugo, S. (2020) Evaluation of early-generation tropical maize testcrosses for grain-yield potential and weevil (Sitophilus zeamais Motschulsky) resistance. Crop Protection, Online first paper (7 September 2020) ISSN: 1873-6904en
dcterms.issued2021-01
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherElsevieren
dcterms.subjectzea maizeen
dcterms.subjectplant breedingen
dcterms.subjecthybridsen
dcterms.subjectstored products pestsen
dcterms.subjectpest resistanceen
dcterms.subjectgermplasmen
dcterms.subjectpostharvest lossesen
dcterms.subjectfitomejoramientoen
dcterms.subjecthíbridosen
dcterms.subjectplagas de productos almacenadosen
dcterms.typeJournal Article

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