Heterosis and combining ability of highland quality protein maize inbred lines

dc.creatorGudeta Nepir
dc.creatorDagne Wegary Gissa
dc.creatorHabtamu Zeleke
dc.date2017-08-23T15:41:24Z
dc.date2017-08-23T15:41:24Z
dc.date2015
dc.date.accessioned2023-07-17T20:01:35Z
dc.date.available2023-07-17T20:01:35Z
dc.identifierhttps://journals-crea.4science.it/index.php/maydica/article/view/1273/961
dc.identifierhttp://hdl.handle.net/10883/18876
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7510937
dc.descriptionQuality protein maize (QPM) cultivars contain higher levels of lysine and tryptophan as compared to non-QPM counterparts, and can minimize the risk of protein malnutrition among communities increasingly dependent on maize as their food staple. This study was undertaken to assess the performances of QPM hybrids, and estimate heterosis and combining ability effects of highland QPM inbred lines for grain yield, agronomic and protein quality traits. Hybrids of 20 inbred lines and two testers, and the parental lines were evaluated across three locations in Ethiopia. Significant variations were observed among the parents and the hybrids for almost all measured traits that allows the selection of preferred inbred lines and hybrids. Several hybrids showed desirable heterosis for most studied traits. Mean squares attributable to general (GCA) and specific (SCA) combining ability effects were significant for most traits. However, the contributions of GCA sum of squares to the variation among the hybrids were larger than SCA sum of squares, suggesting that the traits were conditioned mainly by additive gene effects. Inbred lines L12, L17, L19, and L20 had desirable GCA effects for grain yield, whereas L12 and L13 were the best general combiners for protein quality traits. Hybrids L17 x 142-1eQ and L20 x 142-1-eQ showed most desirable perse performances and SCA effects for grain yield. Based on grain yield SCA effects, most inbred lines used in the study were grouped into distinctive heterotic patterns. This study indicated the possibility of developing highland QPM germplasm with acceptable grain yield, agronomic and protein quality traits.
dc.formatPDF
dc.languageEnglish
dc.publisherConsiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura
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.sourcev. 60
dc.sourceMaydica
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectHeterotic Group
dc.subjectQuality Protein Maize
dc.subjectMAIZE
dc.subjectHETEROSIS
dc.subjectPROTEIN QUALITY
dc.subjectCOMBINING ABILITY
dc.titleHeterosis and combining ability of highland quality protein maize inbred lines
dc.typeArticle
dc.coverageETHIOPIA
dc.coverageItaly


Este ítem pertenece a la siguiente institución