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Stability of resistance to cassava brown streak disease in major agroecologies of Uganda

dc.contributor.authorPariyo, A.
dc.contributor.authorBaguma, Yona K.
dc.contributor.authorAlicai, Titus
dc.contributor.authorKawuki, R.
dc.contributor.authorKanju, E.
dc.contributor.authorBua, A.
dc.contributor.authorOmongo, C.A.
dc.contributor.authorGibson, P.J.
dc.contributor.authorOsiru, D.
dc.contributor.authorMpairwe, D.R.
dc.contributor.authorTukamuhabwa, P.
dc.date.accessioned2019-12-04T10:58:08Z
dc.date.available2019-12-04T10:58:08Z
dc.date.issued2015-03
dc.identifier.citationPariyo, A., Baguma, Y., Alicai, T., Kawuki, R., Kanju, E., Bua, A., ... & Tukamuhabwa, P. (2015). Stability of resistance to cassava brown streak disease in major agro-ecologies of Uganda. Journal of Plant Breeding and Crop Science, 7(3), 67-78.
dc.identifier.issn2006-9758
dc.identifier.urihttps://hdl.handle.net/20.500.12478/922
dc.description.abstractCassava brown streak disease (CBSD) is the most devastating disease of cassava in southern, eastern and cntral Africa, and can cause up to 100% yield loss. Limited progress has been made in breeding for host plant resistance due to limited knowledge on the resistance variability to the disease. Reaction of promising cassava genotypes to CBSD in multi-environments are also unknown. Therefore, this study intended to: (1) Identify additional sources of resistance to CBSD; (2) Determine the stability of resistance to CBSD, and (3) mega-environments for screening resistance to CBSD. Field evaluation of 19 genotypes was conducted in RCBD with three replications at three agro-ecologies of Uganda for two cropping cycles. Additive Main Effects and Multiplicative Interaction (AMMI) and (GGE) biplot models were used to analyze genotype-environment interactions. Based on mean field reaction, the six best genotypes identified for resistance to CBSD were: TZ/06/140, TMS30572, TZ /06/130, N3/66/1, N3/58/1 with N3/104/3 and N3/66/1 being the most stable. While N3/66/1, N3/58/1 and N3/104/3, Mzungu and Kigoma Red were reported to be putative new sources of resistance to CBSD in Uganda. Genotypes (G), Environments (E), and GxE interactions were all significant, with no genotype exhibiting complete resistance. The significant result for GxE interaction to CBSD indicates the need for multi-environment screening and is suggestive of quantitative nature of CBSD resistance.
dc.language.isoen
dc.subjectDisease Resistance
dc.subjectGenotype Environment Interaction
dc.titleStability of resistance to cassava brown streak disease in major agroecologies of Uganda
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationMakerere University
cg.contributor.affiliationNational Crops Resources Research Institute, Uganda
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica South Of Sahara
cg.coverage.countryUganda
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectCassava
cg.journalJournal of Plant Breeding and Crop Science
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid76421
cg.identifier.doihttps://dx.doi.org/10.5897/JPBCS2013.0490


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