Comparison of non-overlapping maize populations of unequal sizes for resistance to maize lethal necrosis

dc.creatorAwata, L.A.O.
dc.creatorIfie, B.E.
dc.creatorDanquah, E.
dc.creatorTongoona, P.
dc.creatorMahabaleswara, S.L.
dc.creatorGowda, M.
dc.creatorMarchelo-D’ragga, P.W.
dc.creatorSitonik, C.
dc.creatorOlsen, M.
dc.creatorPrasanna, B.M.
dc.creatorJumbo, M.B
dc.date2022-01-12T01:05:16Z
dc.date2022-01-12T01:05:16Z
dc.date2021
dc.date.accessioned2023-07-17T20:08:33Z
dc.date.available2023-07-17T20:08:33Z
dc.identifierhttps://hdl.handle.net/10883/21823
dc.identifier10.1080/15427528.2021.1979157
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513591
dc.descriptionContrast between marker-assisted backcross (MABC) and doubled haploid (DH) methods in transferring genes for resistance to maize lethal necrosis (MLN) in maize (Zea mays L.) is not well understood. The MLN is caused by co-infection of maize plant by maize chlorotic mottle virus and sugarcane mosaic virus. Two maize panels consisting of four BC3F2 and six DH populations, separately developed through marker-assisted selection from crosses between susceptible CIMMYT lines and MLN-resistant donor parent (KS23-6), were used in the current study. The two populations were of different population structures with unequal sizes. Experiments were conducted under artificial MLN inoculations for two seasons in 2018. Analyses of variance revealed significant variations among genotypes in both panels (p ≤ 0.001). Levene’s and Welch’s tests found that variances and means of the BC3F2 and DH populations were highly unequal (p ≤ 0.001). The study identified genotypes with reduced MLN infections in both populations; however, lower means for MLN severity and area under disease progress curve (AUDPC) values, and higher heritability estimates were obtained in the DH populations than in the BC3F2 populations. Additionally, the DH populations showed higher relative genetic gains for resistance to MLN compared with the BC3F2 populations. The current study detected superiority of DH over MABC populations for breeding for resistance to MLN. Nevertheless, the results observed in the present study warrant further investigations using the same genetic materials with identical population sizes.
dc.description494-513
dc.languageEnglish
dc.publisherTaylor & Francis
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationGenetic Innovation
dc.relationBill & Melinda Gates Foundation
dc.relationCGIAR Trust Fund
dc.relationhttps://hdl.handle.net/10568/126427
dc.rightsCIMMYT 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
dc.rightsOpen Access
dc.source4
dc.source36
dc.source1542-7528
dc.sourceJournal of Crop Improvement
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectBackcross
dc.subjectDoubled Haploid Lines
dc.subjectMaize Lethal Necrosis
dc.subjectBACKCROSSING
dc.subjectBREEDING LINES
dc.subjectNECROSIS
dc.subjectMARKER-ASSISTED SELECTION
dc.subjectZEA MAYS
dc.titleComparison of non-overlapping maize populations of unequal sizes for resistance to maize lethal necrosis
dc.typeArticle
dc.typePublished Version
dc.coverageUSA


Este ítem pertenece a la siguiente institución