Genetic gains in yield and yield related traits under drought stress and favorable environments in a maize population improved using marker assisted recurrent selection

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cg.authorship.typesCGIAR and developing country institute
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ilorin
cg.contributor.affiliationInternational Maize and Wheat Improvement Center
cg.contributor.crpMaize
cg.contributor.donorBill & Melinda Gates Foundation
cg.coverage.countryNigeria
cg.coverage.iso3166-alpha2NG
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.3389/fpls.2017.00808
cg.identifier.iitathemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.issn1664-462X
cg.journalFrontiers in Plant Science
cg.reviewStatusPeer Review
cg.subject.iitaGENETIC IMPROVEMENT
cg.subject.iitaMAIZE
cg.subject.iitaPLANT BREEDING
cg.subject.iitaPLANT DISEASES
cg.subject.iitaPLANT GENETIC RESOURCES
cg.volume8
dc.contributor.authorBankole, F.
dc.contributor.authorMenkir, A.
dc.contributor.authorOlaoye, G.
dc.contributor.authorCrossa, J.
dc.contributor.authorHearne, S.
dc.contributor.authorUnachukwu, N.N.
dc.contributor.authorGedil, Melaku A
dc.date.accessioned2017-06-23T09:39:52Zen
dc.date.available2017-06-23T09:39:52Zen
dc.identifier.urihttps://hdl.handle.net/10568/82568
dc.titleGenetic gains in yield and yield related traits under drought stress and favorable environments in a maize population improved using marker assisted recurrent selectionen
dcterms.abstractThe objective of marker assisted recurrent selection (MARS) is to increase the frequency of favorable marker alleles in a population before inbred line extraction. This approach was used to improve drought tolerance and grain yield (GY) in a biparental cross of two elite drought tolerant lines. The testcrosses of randomly selected 50 S1 lines from each of the three selection cycles (C0, C1, C2) of the MARS population, parental testcrosses and the cross between the two parents (F1) were evaluated under drought stress (DS) and well watered (WW) well as under rainfed conditions to determine genetic gains in GY and other agronomic traits. Also, the S1 lines derived from each selection types were genotyped with single nucleotide polymorphism (SNP) markers. Testcrosses derived from C2 produced significantly higher grain field under DS than those derived from C0 with a relative genetic gain of 7% per cycle. Also, the testcrosses of S1 lines from C2 showed an average genetic gain of 1% per cycle under WW condition and 3% per cycle under rainfed condition. Molecular analysis revealed that the frequency of favorable marker alleles increased from 0.510 at C0 to 0.515 at C2, while the effective number of alleles (Ne) per locus decreased from C0 (1.93) to C2 (1.87). Our results underscore the effectiveness of MARS for improvement of GY under DS condition.en
dcterms.accessRightsOpen Access
dcterms.audienceScientists
dcterms.available2017-05-17
dcterms.bibliographicCitationBankole, F., Menkir, A., Olaoye, G., Crossa, J., Hearne, S., Unachukwu, N. & Gedil, M. (2017). Genetic Genetic gains in yield and yield related traits under drought stress and favorable environments in a maize population improved using marker assisted recurrent selection. Frontiers in Plant Science, 8(808), 1-10.en
dcterms.extent1-10
dcterms.issued2017-05-17
dcterms.languageen
dcterms.publisherFrontiers Media
dcterms.subjectmaizeen
dcterms.subjectgenetic gainen
dcterms.subjectdrought toleranceen
dcterms.subjectallele frequencyen
dcterms.subjectmarker assisted recurrent selectionen
dcterms.subjectgenotypesen
dcterms.subjectbreedingen
dcterms.subjectdnaen
dcterms.subjecttestcrossesen
dcterms.subjectphenotypicen
dcterms.typeJournal Article

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