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

dc.creatorBankole, F.
dc.creatorMenkir, A.
dc.creatorOlaoye, G.
dc.creatorCrossa, J.
dc.creatorHearne, S.
dc.creatorUnachukwu, N.
dc.creatorGedil, M.
dc.date2017-06-30T16:58:04Z
dc.date2017-06-30T16:58:04Z
dc.date2017
dc.date.accessioned2023-07-17T20:01:17Z
dc.date.available2023-07-17T20:01:17Z
dc.identifierhttp://hdl.handle.net/10883/18618
dc.identifier10.3389/fpls.2017.00808
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7510819
dc.descriptionThe 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.
dc.formatPDF
dc.languageEnglish
dc.publisherFrontiers
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.source808
dc.source8
dc.sourceFrontiers in Plant Science
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectMarker Assisted Recurrent Selection
dc.subjectGENETIC GAIN
dc.subjectYIELDS
dc.subjectDROUGHT TOLERANCE
dc.subjectMAIZE
dc.subjectMARKER-ASSISTED SELECTION
dc.subjectALLELES
dc.subjectALLELE FREQUENCY
dc.titleGenetic gains in yield and yield related traits under drought stress and favorable environments in a maize population improved using marker assisted recurrent selection
dc.typeArticle
dc.coverageSwitzerland


Este ítem pertenece a la siguiente institución