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Genetic and phenotypic association between yield components in hybrid sorghum (Sorghum bicolor (L.) Moench) populations

dc.contributor.authorKenga, R.
dc.contributor.authorTenkouano, A.
dc.contributor.authorGupta, S.C.
dc.contributor.authorAlabi, S.O.
dc.date.accessioned2019-12-04T11:18:05Z
dc.date.available2019-12-04T11:18:05Z
dc.date.issued2006
dc.identifier.citationKenga, R., Tenkouano, A., Gupta, S.C. & Alabi, S.O. (2006). Genetic and phenotypic association between yield components in hybrid sorghum (Sorghum bicolor (L.) Moench) populations. Euphytica, 150(3), 319-326.
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3034
dc.description.abstractThe magnitude of genetic expression and associations among traits are important for the prediction of response to selection in diverse environments and provide the basis for planning and evaluating breeding programs. In this regard, a cross classification mating design was used to produce hybrid sorghum populations, which were evaluated in a randomized completed block design with three replications at four environments in Northern Cameroon. Data on grain yield, days to anthesis, plant height, inflorescence length, threshing percentage and seed mass were collected and subjected to statistical genetic analyses. Significant genotype × environment interaction effects were observed for all traits. Genetic variance was essentially attributed to additive gene effects, with dominance variance for grain yield being negligible. However, the reverse was observed for threshability. Genetic variance components were much higher for plant height and grain yield than for days to anthesis, seed mass and threshability. Heritability estimates for plant height and inflorescence length were high (77 and 54 percent respectively) while the estimates for grain yield and threshability were low (14 and 5 percent respectively). Grain yield had positive genotypic correlation with most of the traits. Days to anthesis were negatively correlated with vegetative and reproductive traits. These results suggest that improvement of days to anthesis, plant height, and inflorescence length should be faster because of higher heritabilities and greater phenotypic variation. However, selection for earliness and reduced plant height would not be possible without hampering grain yield. Selecting for yield primary components namely inflorescence length and seed weight would be effective for increasing production. In addition, optimizing agronomic practices and improved experimental design would increase the selection efficiencies.
dc.language.isoen
dc.subjectBreeding
dc.subjectGenetic Correlation
dc.subjectHeritability
dc.subjectHybrid Sorghum
dc.subjectYield Components
dc.subjectYield
dc.subjectInflorescence Length
dc.subjectAnthesis
dc.titleGenetic and phenotypic association between yield components in hybrid sorghum (Sorghum bicolor (L.) Moench) populations
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInstitute of Agricultural Research for Development, Cameroon
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInternational Crops Research Institute for the Semi-Arid Tropics
cg.contributor.affiliationAhmadu Bello University
cg.coverage.regionAfrica
cg.coverage.regionAsia
cg.coverage.regionCentral Africa
cg.coverage.regionSouth Asia
cg.coverage.regionWest Africa
cg.coverage.countryCameroon
cg.coverage.countryIndia
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectFarm Management
cg.iitasubjectFood Security
cg.iitasubjectLivelihoods
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectAgribusiness
cg.iitasubjectPlant Production
cg.iitasubjectPests Of Plants
cg.iitasubjectGenetic Improvement
cg.iitasubjectDisease Control
cg.iitasubjectPlant Diseases
cg.iitasubjectHandling, Transport, Storage And Protection Of Agricultural Products
cg.accessibilitystatusLimited Access
local.dspaceid94500
cg.identifier.doihttp://dx.doi.org/10.1007/s10681-006-9108-5


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