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Comparison of Selection Traits for Effective Popcorn (Zea mays L. var. Everta) Breeding Under Water Limiting Conditions

2020-08-27Artigo científico Acesso aberto
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dc.contributor.authorKamphorst, Samuel Henrique
dc.contributor.authorAmaral Júnior, Antônio Teixeira do
dc.contributor.authorde Lima, 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-Díaz, Omar
dc.contributor.authorAraus Ortega, Jose Luis
dc.contributor.authorRamalho, José Cochicho
dc.contributor.authorCampostrini, Eliemar
dc.contributor.institutionGeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
dc.contributor.pblFrontiers Media
dc.date.accessioned2021-07-15T22:21:20Z
dc.date.available2021-07-15T22:21:20Z
dc.date.issued2020-08-27
dc.descriptionBrasil (CAPES) Finance Code 001 E26/201.813/2017 E26/202.761/2017 UID/UIDB/00239/2020 UIDP/04035/2020
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) (ψsoil≥ −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 constraint.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent8625653
dc.identifier.doi10.3389/fpls.2020.01289
dc.identifier.issn1664-462X
dc.identifier.otherPURE: 32581550
dc.identifier.otherPURE UUID: b1f94c8e-e663-4c9f-99d4-3c2a00b1e819
dc.identifier.otherScopus: 85090793798
dc.identifier.otherPubMed: 32973848
dc.identifier.otherPubMedCentral: PMC7481401
dc.identifier.otherWOS: 000570598500001
dc.identifier.urihttp://hdl.handle.net/10362/121084
dc.identifier.urlhttps://www.scopus.com/pages/publications/85090793798
dc.language.isoeng
dc.peerreviewedyes
dc.subjectcarbon isotope composition (δC)
dc.subjectdrought
dc.subjectleaf gas exchanges
dc.subjectpopcorn yield
dc.subjectwater use efficiency
dc.subjectPlant Science
dc.subjectSDG 13 - Climate Action
dc.titleComparison of Selection Traits for Effective Popcorn (Zea mays L. var. Everta) Breeding Under Water Limiting Conditionsen
dc.typejournal article
degois.publication.titleFrontiers in Plant Science
degois.publication.volume11
dspace.entity.typePublication
rcaap.rightsopenAccess

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