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Screening for drought tolerance in thirty three Taro cultivars

2018Journal article Open access
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dc.contributor.authorGanança, José F. T.
dc.contributor.authorFreitas, José G. R.
dc.contributor.authorNóbrega, Humberto G.M.
dc.contributor.authorRodrigues, Vanessa
dc.contributor.authorAntunes, Gonçalo
dc.contributor.authorGouveia, Carla S. S.
dc.contributor.authorRodrigues, Miguel
dc.contributor.authorChair, Hana
dc.contributor.authorCarvalho, Miguel A. A. Pinheiro de
dc.contributor.authorLebot, Vincent
dc.date.accessioned2018-11-07T14:39:10Z
dc.date.available2018-11-07T14:39:10Z
dc.date.issued2018
dc.description.abstractTaro [Colocasia esculenta (L.) Schott] is a root crop which is an important staple food in many regions of the world, producing 10.5 million tonnes on 1.4 million hectares a year. The crop is cultivated in wet (rain fed) or irrigated conditions, requiring on average 2,500 mm water per year, and in many countries it is cultivated in flooded plots. It is estimated that taro production could decrease by 40% as a result of the increase in drought and other severe events. In this work, thirty three accessions, including local cultivars, selected and hybrid lines were submitted to long duration drought stress and screened for tolerance. Twelve physiological, morphological and agronomic traits were measured at harvest, and subject to multivariate analysis. Stress indices, Water Use Efficiency and Factorial Analysis were useful for discriminating accessions regarding drought tolerance and yield stability, and drought tolerant and susceptible cultivars were identified. Our results confirm that different taro cultivars have different drought avoidance and tolerance strategies to cope with water scarcity. Better yield performers minimised biomass and canopy loss, while tolerance was observed in cultivars that presented low potential yield, but efficiently transferred resources to enhance corm formation. Among the 33 accessions, two local cultivars showed high yield stability and could be considered as suitable parents for breeding programs, while two others are well adapted to drought, but with overall low yield potential.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGanança José F.T., Freitas José G.R., Nóbrega Humberto G.M., Rodrigues Vanessa, Antunes Gonçalo, Gouveia Carla S.S., Rodrigues Miguel, Chaïr Hâna, Pinheiro de Carvalho Miguel A.A., Lebot Vincent. 2018. Screening for drought tolerance in thirty three taro cultivars. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 46 (1) : 65-74.pt_PT
dc.identifier.doihttp://dx.doi.org/10.15835/nbha46110950pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/2142
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAcademicPrespt_PT
dc.relation.publisherversionwww.notulaebotanicae.ropt_PT
dc.subjectAbiotic stresspt_PT
dc.subjectMulticriteria indicespt_PT
dc.subjectPlant water usept_PT
dc.subjectTaro breedingpt_PT
dc.subjectYield stabilitypt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleScreening for drought tolerance in thirty three Taro cultivarspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage74pt_PT
oaire.citation.startPage65pt_PT
oaire.citation.titleNotulae Botanicae Horti Agrobotanici Cluj-Napocapt_PT
oaire.citation.volume46(1)pt_PT
person.familyNameGanança
person.familyNameNóbrega
person.familyNameGouveia
person.familyNameAlmeida Pinheiro de Carvalho
person.familyNameLebot
person.givenNameJosé Filipe
person.givenNameHumberto
person.givenNameCarla
person.givenNameMiguel Angelo
person.givenNameVincent
person.identifier1218558
person.identifier.ciencia-idAE1B-9773-68A8
person.identifier.ciencia-id4610-6741-6816
person.identifier.orcid0000-0002-8384-6188
person.identifier.orcid0000-0001-8900-9340
person.identifier.orcid0000-0001-9309-4613
person.identifier.orcid0000-0002-5084-870X
person.identifier.orcid0000-0001-5699-0566
person.identifier.ridAAH-9928-2020
person.identifier.ridAEE-0913-2022
person.identifier.scopus-author-id55554091900
person.identifier.scopus-author-id8758577600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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