Mutation breeding for heat and drought tolerance in tepary bean (<em>Phaseolus acutifolius</em> A. Gray)

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cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationUniversidad Nacional de Colombiaen
cg.contributor.affiliationInternational Atomic Energy Agencyen
cg.contributor.affiliationUnited States Department of Agricultureen
cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.creator.identifierDaniel G. Debouck: 0000-0002-7618-9570en
cg.creator.identifierIdupulapati M. Rao: 0000-0002-8381-9358en
cg.identifier.doihttps://doi.org/10.21475/ajcs.21.15.09.sp-7en
cg.issn1835-2693en
cg.issue15(09):2021en
cg.journalAustralian Journal of Crop Scienceen
cg.reviewStatusPeer Reviewen
cg.speciesPhaseolus acutifoliusen
cg.subject.alliancebiovciatGENETIC RESOURCESen
dc.contributor.authorMuñoz, Ligia Carmenzaen
dc.contributor.authorDebouck, Daniel G.en
dc.contributor.authorRivera, Marielaen
dc.contributor.authorMuñoz, Jaime E.en
dc.contributor.authorAlpala, Deisyen
dc.contributor.authorSarsu, Fatmaen
dc.contributor.authorRao, Idupulapati M.en
dc.date.accessioned2021-11-19T09:01:51Zen
dc.date.available2021-11-19T09:01:51Zen
dc.identifier.urihttps://hdl.handle.net/10568/116165
dc.titleMutation breeding for heat and drought tolerance in tepary bean (<em>Phaseolus acutifolius</em> A. Gray)en
dcterms.abstractTepary bean (<em>Phaseolus acutifolius</em> A. Gray) is more heat and drought tolerant than common bean (<em>P. vulgaris L.</em>). Four hundred mutant lines of two tepary accessions (G40068 and G40159) were generated by ethyl methane sulfonate (EMS) treatment. In preliminary studies of the M5 mutant lines under abiotic stress, three mutant lines (CMT 38, CMT 109, CMT 187) were selected from six mutated lines based on morpho-physiological traits and superior yield and advanced to the M6 generation. The M6 mutant lines were uniform and genetically stable. These mutant lines and their original (M0) parents were evaluated for heat and drought tolerance under greenhouse conditions. Their performance was evaluated for morpho-physiological attributes, seed yield and yield components. Under high temperature and drought conditions, the CMT 38 mutant (M6 line) and its original tepary (M0) accession (G40068) showed greater values of pod biomass, pod number and 100-seed biomass than the other lines tested. The CMT 109 and CMT 187 mutant lines and their G40159 original accession (M0) also showed the highest value of seed number under high temperature and drought conditions. This suggests that the previous screening performed during the population advancement of these mutant lines, based on morphological traits like growth habit, was not detrimental to the yield variables evaluated here. Under combined heat and drought conditions, different parameters could be incorporated into tepary breeding programmes, as selection criteria to screen genotypes for tolerance to heat and drought stress. These parameters included: chlorophyll (SPAD) readings, seed biomass, 100-seed biomass and seed number because they explain the observed variance in the principal component analysis. Two additional traits (root biomass and stem diameter) were also identified as useful attributes, based on univariate analysis. The mutant lines evaluated here offer potential for further improvement of tepary bean to high temperature and drought.en
dcterms.accessRightsOpen Access
dcterms.available2021-09-10en
dcterms.bibliographicCitationMuñoz, L.C.; Debouck, D.G.; Rivera, M.; Muñoz, J.E.; Alpala, D.; Sarsu, F.; Rao, I.M. (2021) Mutation breeding for heat and drought tolerance in tepary bean (<em>Phaseolus acutifolius</em> A. Gray). Australian Journal of Crop Science, Special Issue 2021. 15(09) p. 60-68. ISSN: 1835-2693en
dcterms.extent60-68en
dcterms.issued2021-09-10en
dcterms.languageen
dcterms.licenseCC-BY-3.0-IGO
dcterms.publisherSouthern Cross Publishingen
dcterms.subjectabiotic stressen
dcterms.subjectyielden
dcterms.subjectplant breedingen
dcterms.subjectmutagenesisen
dcterms.subjectestrés abióticoen
dcterms.subjectrendimientoen
dcterms.subjectfitomejoramientoen
dcterms.subjectmutagénesisen
dcterms.subjectphaseolusen
dcterms.subjectphaseolus acutifoliusen
dcterms.typeJournal Article

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