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Comparison of selection traits for effective popcorn (Zea mays L. var. Everta) breeding under water limiting conditions

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dc.contributor.authorKamphorst, Samuel Henrique
dc.contributor.authorAmaral Júnior, António Teixeira do
dc.contributor.authorLima, Valter Jário
dc.contributor.authorSantos, Pedro Henrique Araújo Diniz
dc.contributor.authorRodrigues, Weverton Pereira
dc.contributor.authorVivas, Janieli Maganha Silva
dc.contributor.authorGonçalves, Gabriel Moreno Bernardo
dc.contributor.authorSchmitt, Katia Fabiane Medeiros
dc.contributor.authorLeite, Jhean Torres
dc.contributor.authorVivas, Marcelo
dc.contributor.authorMora-Poblete, Freddy
dc.contributor.authorVergara-Diaz, Omar
dc.contributor.authorOrtega, Jose Luis Araus
dc.contributor.authorRamalho, José C.
dc.contributor.authorCampostrini, Eliemar
dc.date.accessioned2020-09-24T14:43:13Z
dc.date.available2020-09-24T14:43:13Z
dc.date.issued2020
dc.descriptionOriginal Researchpt_PT
dc.description.abstractClimate change is expected to intensify water restriction to crops, impacting on the yield potential of crops such as popcorn. This work aimed to evaluate the performance of 10 field cultivated popcorn inbred lines during two growing seasons, under well-watered (WW) and water stressed (WS) (ysoil≥ −1.5 MPa) conditions. Water stress was applied by withholding irrigation in the phenological phase of male pre-anthesis. Additionally, two contrasting inbred lines, P7 (superior line) and L75 (low performer) were compared for grain yield (GY) and expanded popcorn volume (EPV), selected from previous studies, were tested under greenhouse conditions. In the field, no genotype x water condition x crop season (G×WC×CS) interaction was observed, whereas GY (−51%), EPV (−55%) and leaf greenness (SPAD index) measured 17 days after anthesis (DAA) (> −10%) were highly affected by water limitation. In general, root traits (angles, number, and density) presented G×WC×CS interaction, which did not support their use as selection parameters. In relation to leaf senescence, for both WS and WW conditions, the superior inbred lines maintained a stay-green condition (higher SPAD index) until physiological maturity, but maximum SPAD index values were observed later in WW (48.7 by 14 DAA) than in WS (43.9 by 7 DAA). Under both water conditions, negative associations were observed between SPAD index values 15 and 8 days before anthesis DBA), and GY and EPV (r ≥ −0.69), as well as between SPAD index 7, 17, and 22 DAA, and angles of brace root (AB), number of crown roots (NC) and crown root density (CD), in WS (r ≥ −0.69), and AB and CD, in WW (r ≥ −0.70). Lower NC and CD values may allow further root deepening in WS conditions. Under WS P7 maintained higher net photosynthesis values, stomatal conductance, and transpiration, than L75. Additionally, L75 exhibited a lower (i.e., more negative) carbon isotope composition value than P7 under WS, confirming a lower stomatal aperture in L75. In summary, besides leaf greenness, traits related to leaf photosynthetic status, and stomatal conductance were shown to be good indicators of the agronomic performance of popcorn under water constraintpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationKamphorst SH, Amaral Ju´ nior ATd, de Lima VJ, Santos PHAD, Rodrigues WP, Vivas JMS, Gonc¸alves GMB, Schmitt KFM, Leite JT, Vivas M, Mora-Poblete F, Vergara-D´ıaz O, Araus Ortega JL, Ramalho JC and Campostrini E (2020) Comparison of Selection Traits for Effective Popcorn (Zea mays L. var. Everta) Breeding Under Water Limiting Conditions. Front. Plant Sci. 11:1289pt_PT
dc.identifier.doi10.3389/fpls.2020.01289pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/20397
dc.language.isoengpt_PT
dc.publisherRaul Antonio Sperotto, Universidade do Vale do Taquari-Univates, Brazilpt_PT
dc.relation.publisherversionwww.frontiersin.orgpt_PT
dc.subjectcarbon isotope composition (d13C)pt_PT
dc.subjectdroughtpt_PT
dc.subjectleaf gas exchangespt_PT
dc.subjectpopcorn yieldpt_PT
dc.subjectwater use efficiencypt_PT
dc.titleComparison of selection traits for effective popcorn (Zea mays L. var. Everta) breeding under water limiting conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleFrontiers in Plant Sciencept_PT
person.familyNameRamalho
person.givenNameJosé
person.identifier1111962
person.identifier.ciencia-id2C14-07F8-4EFE
person.identifier.orcid0000-0002-7639-7214
person.identifier.ridG-2427-2014
person.identifier.scopus-author-id57196449038
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication2cedc58c-62ef-4973-a443-ebc72ae2ac4d
relation.isAuthorOfPublication.latestForDiscovery2cedc58c-62ef-4973-a443-ebc72ae2ac4d

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