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Genetic variability in cassava as it influences storage root yield in Nigeria

dc.contributor.authorAina, O.O.
dc.contributor.authorDixon, A.
dc.contributor.authorAkinrinde, E.
dc.date.accessioned2019-12-04T11:19:25Z
dc.date.available2019-12-04T11:19:25Z
dc.date.issued2007
dc.identifier.citationAina, O., Dixon, A. & Akinrinde, E. (2007). Genetic variability in cassava as it influences storage root yield in Nigeria. Journal of Biological Sciences, 7(5), 765-770.
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3461
dc.description.abstractGenetic variability in shoot and root characteristics among 20 broad-based cassava genotypes was studied in four agroecological zones in Nigeria to determine its effects on root yield. Seventeen agronomic parameters were evaluated on a plot size of 40 m2, at spacing of 1x1 m in a Randomized Complete Block Design (RCBD) in four replicates. Analysis of variance (ANOVA) showed significant differences (p< 0.001) among genotypes within and across locations for most parameters. Significant genotype by environment (GxE) interaction effects was also observed. Estimates of genetic variances for phenotypic and genotypic coefficients of variation were higher for root characters than for shoot characters. PCV ranged from 4.3 to 36.5%; GCV ranged from 3.2 to 22.6%. Broad sense heritability (H2) estimates were high for root characters, ranging from 75 to 88.6%, but low for shoot characters, ranging between 10.6 and 38%. Consequently, considerable scope exists for the improvement of economic traits, such as storage root yield. Shoot traits have little control on storage root yield while root traits with high genetic influence had major control on storage root yield. Number of roots, root size and Harvest Index are major yield determinants to be considered when selecting for root yield in cassava.
dc.language.isoen
dc.subjectCassava Genotypes
dc.subjectPhenotypic And Genotypic Coefficient
dc.subjectStorage Root Yield
dc.subjectTraits
dc.subjectGermplasm
dc.subjectHarvest Index
dc.subjectMorphological
dc.titleGenetic variability in cassava as it influences storage root yield in Nigeria
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationUniversity of Ibadan
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectPlant Breeding
cg.iitasubjectCassava
cg.iitasubjectGenetic Improvement
cg.iitasubjectPost-Harvesting Technology
cg.iitasubjectFood Security
cg.iitasubjectPlant Production
cg.iitasubjectLivelihoods
cg.iitasubjectPlant Diseases
cg.iitasubjectAgribusiness
cg.iitasubjectDisease Control
cg.iitasubjectDomestic Trade
cg.iitasubjectPests Of Plants
cg.accessibilitystatusLimited Access
local.dspaceid95432
cg.identifier.doihttps://doi.org/10.3923/jbs.2007.765.770


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