Genetic variation, Heritability estimates and GXE effects on yield traits of Mesoamerican common bean (Phaseolus vulgaris L) germplasm in Uganda

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dc.contributor.authorOkii, Dennis
dc.contributor.authorMukankusi, Clare
dc.contributor.authorSebuliba, Sulaiman
dc.contributor.authorTukamuhabwa, Phinehas
dc.contributor.authorTusiime, Geoffrey
dc.contributor.authorTalwana, Herbert
dc.contributor.authorOdong, Thomas
dc.contributor.authorNamayanja, Annet
dc.contributor.authorPaparu, Pamela
dc.contributor.authorNkalubo, Stanley
dc.contributor.authorOtim, Michael
dc.contributor.authorUgen, Michael
dc.contributor.authorBuah, Stephen
dc.contributor.authorGepts, Paul
dc.date.accessioned2022-02-01T06:07:25Z
dc.date.available2022-02-01T06:07:25Z
dc.date.issued2018
dc.description.abstractGermplasm of common beans from the Mesoamerican gene pool races: Durango, Jalisco, Mesoamerica and Guatemala have highest genetic variation for the crop’s improvement. The objective was to assign 50 common bean germplasm in Uganda into its gene pool races based on analyses of population structure. Secondly, to estimate heritability and effects of genotype environment (GXE) interaction on common bean agronomic and yield traits in space and time. Sample genomic DNA was amplified in 2011 with 22 Simple sequence repeat markers (SSRs) and alleles separated using capillary electrophoresis. Field evaluations were conducted in 2010 and 2011 at NaCRRI and 2015 at CIAT – Kawanda. Multivariate analyses of SSRs data identified four subgroups within the germplasm: K4.1–K4.4, with corresponding Wrights fixation indices (FST) as 0.1829 for K4.1, 0.1585 for K4.4, 0.1579 for K4.2 and least for K4.3 at 0.0678. Gene pool race admixtures in the population (14%) were notable and attributed to gene flow. Four superior parents currently used in improving resistance to major diseases grouped as; Jalisco for MLB49-89A; Mesoamerica for MCM5001 and G2333; Durango for MEXICO 54. Heritability values for yield traits estimated using phenotypic data from above fixed parents, was above 0.81. Season and location had significant effect (P < 0.05) on numbers of: flower buds per inflorescence, pod formation and weight of 100 seeds. The findings will improve understanding of co-evolutionary relationships between bean hosts and pathogens for better disease management and will broaden the germplasm base for improving other tropical production constraints.en_US
dc.identifier.citationOkii, D., Mukankusi, C., Sebuliba, S., Tukamuhabwa, P., Tusiime, G., Talwana, H., ... & Gepts, P. (2018). Genetic variation, Heritability estimates and GXE effects on yield traits of Mesoamerican common bean (Phaseolus vulgaris L) germplasm in Uganda. Plant Genetic Resources, 16(3), 237-248. doi:10.1017/S1479262117000259en_US
dc.identifier.other10.1017/S1479262117000259
dc.identifier.urihttps://nru.uncst.go.ug/xmlui/handle/123456789/1716
dc.language.isoenen_US
dc.publisherPlant Genetic Resourcesen_US
dc.subjectSSRsen_US
dc.subjectMesoamericaen_US
dc.subjectRacesen_US
dc.subjectDiseasesen_US
dc.subjectHeritabilityen_US
dc.subjectYielden_US
dc.subjectVariationsen_US
dc.titleGenetic variation, Heritability estimates and GXE effects on yield traits of Mesoamerican common bean (Phaseolus vulgaris L) germplasm in Ugandaen_US
dc.typeArticleen_US
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