Evaluation of testcrosses involving early maturing yellow maize inbred lines and elite testers

Availability of multiple-stress tolerant maize is critical for improvement in maize production in West and Central Africa (WCA). A study was carried out to (i) assess a set of inbred lines for combining ability under stressed and optimal conditions, (ii) determine the performance of the testcrosses under different conditions, and (iii) identify outstanding hybrids across the conditions. Two hundred and five testcrosses were planted with five hybrid checks under Striga-infested, low soil nitrogen, drought and optimal conditions between 2015 and 2016 in Nigeria. The grain yield inheritance under optimal condition was largely regulated by additive gene effect whereas non-additive gene effects largely regulated grain yield under the three stresses. Four of the inbreds had significant positive general combining ability effects each under low N and drought, and three under Striga infestation for grain yield. The inbreds could be vital sources of beneficial alleles for development and improvement of tropical yellow maize hybrids and populations. Hybrids TZEI 443 x ENT 13 and TZEI 462 x TZEI 10 were high yielding and stable; they out-performed the three early maturing released hybrids in WCA. The new hybrids should be extensively assessed and released in the sub-region to improve food security.


Data and Resources

Additional Info

Field Value
Creator Badu-Apraku, Baffour
Creator Affiliation International Institute of Tropical Agriculture (IITA)
Creator ID Type ORCID
Creator ID 0000-0003-0113-5487
Subject Vocab (AGROVOC/GACS/CAB) Striga,Inbred lines,Soil,Nitrogen,Grain,Yield,Stress,Maturity,Hybrids,Gene
Subject(s) Root lodging,STMA,Stalk lodging,Landraces
Publisher International Institute of Tropical Agriculture (IITA)
Contributor Person Annor, B., Nyadanu, D., Akromah, R., Fakorede, M.A.B
Contributor Role Other
Contributor Project Lead Organisation Center International Institute of Tropical Agriculture (IITA)
Contributor Project Lead Center International Institute of Tropical Agriculture (IITA)
Contributor CRP CGIAR Research Program on Maize
Contributor Partner Not applicable
Contributor Donor Alliance for a green revolution in Africa, Borlaug LEAP fellowship
Contributor Project Drought Tolerant Maize for Africa (DTMA)
Project ID
Contributor Affiliation
Open-Access status Open Access
Production Date 2016-10-28
Embargo End Date
Content Type Dataset
File Format csv
Identifier Type DOI
Identifier https://doi.org/10.25502/k7q1-bw26/d
Identifier Citation Testcross performance and combining ability of early maturing maize inbreds under multiple-stress environments, Annor, B.*, Badu-Apraku, B., Nyadanu, D.*, Akromah, R.* and Fakorede, M.*, in: Scientific Reports, volume 9, number -: 13809, pages 1-11, ISSN 2045-2322, 2019. http://dx.doi.org/10.1038/s41598-019-50345-3
Source Drought Tolerant Maize for Africa (DTMA)
Language English
Relation Not applicable
Agroecological Zone Subhumid warm tropics
Coverage Region Western Africa
Coverage country Nigeria
Coverage Admin Unit Not applicable
Coverage Y (Latitude) 9.082
Coverage X (Longitude) 8.67528
Coverage Start Date 2015-02-05
Coverage End Date 2016-10-28
Contact Badu-Apraku, Baffour Maize Breeder, International Institute of Tropical Agriculture (IITA)
Contact Email b.badu-apraku@cgiar.org
Restriction CC-BY 4.0
Email Permission None
Rights CC-BY 4.0