Gain and performance in yield and micronutrient concentration in common bean improvement

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dc.creatorAmongi, Winnyfred
dc.creatorKato, Fred
dc.creatorSsekamate, Allan Male
dc.creatorNakyanzi, Brenda
dc.creatorSebuliba, Sulaiman
dc.creatorKabwama, Andrew
dc.creatorMbiu, Julius
dc.creatorWilliams, Magdalena
dc.creatorBaguma, Gerald
dc.creatorMukankusi, Clare
dc.date2023-01
dc.date2022-12-06T14:49:17Z
dc.date2022-12-06T14:49:17Z
dc.date.accessioned2026-06-27T13:32:14Z
dc.descriptionCommon bean (Phaseolus vulgaris L.) is a staple and nutritious leguminous food crop for all income categories in Africa. Efforts to improve its yield performance and nutritional components, especially Iron and zinc have resulted in the release of several varieties in the sub-Saharan African region. The objective of this study was to assess genetic progress in varieties released in 12 African countries through the Pan African Bean Research Alliance (PABRA) from 1973 to 2017, to inform current breeding decisions. A total of 214 released varieties, land races and breeding lines, of bush and climbing beans were evaluated for yield, micronutrient (Fe and Zn) concentration, and phenology in three locations (Kawanda and Kachwekano in Uganda, and Kitengule in Tanzania) in 2017–2018. There were significant differences (P 0.01) among genotypes for all traits except days to maturity (DPM). Genotype x environment interaction was also significant (P<0.05) for all assessed traits, except for iron in climbing beans. Across environments, repeatability (H2) was greater than 0.50 for all traits, except for DPM in climbing beans. Annual rates of genetic yield gains were 4.41 and 4.57 kg ha-1 for large and small seed bush beans, and -2.74 and 21.6 kg ha-1 for large and small seeded climbers. Similarly, gains in seed iron (FESEED) were 0.40 and 0.17 ppm for bush and climbing beans, respectively. These represented an annual relative gain over the oldest varieties of 0.6 and 0.7% kg ha-1 for yield of large and small seeded bush beans, -0.3 and 1.6% kg ha-1 for yield of large and small seeded climbers, 0.6 and 0.2% ppm for FESEED of bush and climbers. Overall, genetic progress was slow for both yield and FESEED.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/125803
dc.identifier.urihttp://hdl.handle.net/123456789/62486
dc.languageen
dc.publisherAfrican Journals Online
dc.rightsOpen Access
dc.sourceAmongi, W.; Kato, F.; Male, A.; Nakyanzi, B.; Sebuliba, S.; Kabwama, A.; Mbiu, J.; Williams, M.; Baguma, G.; Mukankusi, C. (2023) Gain and performance in yield and micronutrient concentration in common bean improvement. African Crop Science Journal 31(1) p. 85-111 ISSN: 1021-9730
dc.subjectbiofortification
dc.subjectgenetic gain
dc.subjectzinc
dc.subjectphaseolus vulgaris
dc.subjectbioenriquecimiento
dc.subjectmejora genética
dc.subjectcinc-zinc
dc.titleGain and performance in yield and micronutrient concentration in common bean improvement
dc.typeJournal Article

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