Yield and Response of Bean Breeding Lines for Drought Tolerance to Field Diseases

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cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.coverage.countryUganda
cg.coverage.iso3166-alpha2UG
cg.coverage.regionEastern Africa
cg.creator.identifierWinnyfred Amongi: 0000-0001-8532-2348en
cg.creator.identifierClare Mukankusi: 0000-0001-7837-4545en
cg.edition11(13)en
cg.identifier.doihttps://doi.org/10.5539/jas.v11n13p81en
cg.issn1916-9752en
cg.issue13en
cg.journalJournal of Agricultural Scienceen
cg.volume11en
dc.contributor.authorAmongi, Winnyfreden
dc.contributor.authorMukankusi, Clare Mugishaen
dc.contributor.authorSebuliba, Sulaimanen
dc.contributor.authorNakyanzi, Brendaen
dc.contributor.authorNaluwooza, Claireen
dc.contributor.authorBaguma, Geralden
dc.date.accessioned2019-09-26T14:44:47Zen
dc.date.available2019-09-26T14:44:47Zen
dc.identifier.urihttps://hdl.handle.net/10568/103769
dc.titleYield and Response of Bean Breeding Lines for Drought Tolerance to Field Diseasesen
dcterms.abstractClimate change has resulted in an increase in the intensity of droughts and rains, and higher temperatures which are adversely affecting crop production in Africa. It has also influenced the distribution and increased the occurrence of disease and pest epidemics. Common bean (Phaseolus vulgaris L.) is especially sensitive to these changes. Most released varieties are not well adapted to environmental extremes and extended periods of drought in particular has become a major constraint. In this study, 462 advanced breeding lines developed for drought tolerance were evaluated for yield, agronomic traits and disease response in two contrasting agro-ecologies, Kawanda in the Lake Victoria crescent and Kachwekano in the southwestern highlands. Analysis of variance indicated significant differences (P < 0.05) among lines for most variables and environments (P <0.001). Performance was better at Kachwekano than Kawanda with mean yields ranging from 928 to 2251 kg ha-1, and 698 to 2036 kg ha-1 respectively. Angular leafspot, common bacterial blight and rust diseases varied between locations, and among lines with no visible to sever symptoms. Based on Wricke’s ecovalence estimates for stability, SCN20, SCN13, SEN114, SEC40 and SEC35 expressed yield stability and superiority. Of the 462 lines, 6.3 % maintained >1500 kg ha-1, the minimum anticipated commercial yield of new varieties, in all the trials, both seasons and in each year; 5.0 % also maintained above average yields. The most outstanding (1629-3944 kg ha-1) were; DAB299, DAB291, DAB234, DAD34, DAB478, DAB487, DAB543, DAB231, SCN20, SCR66, SCR60, and SER335. These are recommended for development of new varieties.en
dcterms.accessRightsOpen Access
dcterms.available2019-08-15en
dcterms.bibliographicCitationAmongi, Winnyfred; Mukankusi, Clare; Sebuliba, Sulaiman; Nakyanzi, Brenda; Naluwooza, Claire; Baguma, Gerald (2019). Yield and Response of Bean Breeding Lines for Drought Tolerance to Field Diseases. Journal of Agricultural Science 11(13): 81-98.en
dcterms.extent81-98en
dcterms.issued2019-08en
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherCanadian Center of Science and Educationen
dcterms.subjectdiseasesen
dcterms.subjectdroughten
dcterms.subjectclimate changeen
dcterms.subjectagricultureen
dcterms.subjectbeansen
dcterms.subjectframeworksen
dcterms.typeJournal Article

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