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dc.contributor.author
Uribelarrea, Martin
dc.contributor.author
Cárcova, Jorgelina
dc.contributor.author
Borras, Lucas
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Otegui, Maria Elena
dc.date.available
2021-04-30T14:19:59Z
dc.date.issued
2008-02
dc.identifier.citation
Uribelarrea, Martin; Cárcova, Jorgelina; Borras, Lucas; Otegui, Maria Elena; Enhanced kernel set promoted by synchronous pollination determines a tradeoff between kernel number and kernel weight in temperate maize hybrids; Elsevier Science; Field Crops Research; 105; 3; 2-2008; 172-181
dc.identifier.issn
0378-4290
dc.identifier.uri
http://hdl.handle.net/11336/131147
dc.description.abstract
Maize (Zea mays L.) grain yield is strongly related to the number of harvested kernels, where kernel number can be increased by synchronously pollinating silks rather than allowing them to be progressively pollinated as they naturally appear from the husks. However, there is scarce evidence on how this practice affects kernel weight (KW) and plant grain yield (PGY), and no report exists on its effects when combined with treatments aimed to reduce apical dominance, like male sterility and detasseling. Field experiments were conducted in two growing seasons (Exp1 and Exp2) using two hybrids, cropped at contrasting stand densities (3 and 9 plants per m2) and including (i) male-fertile and male-sterile versions, (ii) tasseled and detasseled plants, and (iii) natural (NP) and synchronous pollination (SP; pollen added manually to ears bagged 5 days after initial silking) systems. Tassel growth of sterile and fertile versions was also evaluated in a separate experiment (Exp3). Detasseling increased the number of ears per plant reaching silking (P < 0.001) of NP plants, but this beneficial effect of reduced apical dominance did not improve kernel number per plant (KNP) or PGY. Similarly, the early arrest of anther growth in male-sterile plants had no clear benefit on KNP. In contrast, KNP was enhanced by synchronous pollination (range between -13% and +71%; average of +15.4% in Exp1 and +3.9% in Exp2). However, this pollination system promoted a decreased in KW (range between -30% and +4%; average of -11.8% in Exp1 and -7.8 in Exp2) such that the treatment had no effect on PGY (range between -19% and +37%; average of +1% in Exp1 and -4% in Exp2). Because plant growth rate around flowering was not different between pollination treatments, assimilate availability per kernel was reduced from ovary fertilization onwards in synchronously pollinated plants when compared to open pollinated plants. This explains the reduced KW when increasing KNP by synchronous pollination. In summary, none of the imposed treatments allowed grain yield to be increased at the plant level.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
APICAL DOMINANCE
dc.subject
GRAIN YIELD COMPONENTS
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MAIZE
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SYNCHRONOUS POLLINATION
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ZEA MAYS
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Otras Ciencias Agrícolas
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Otras Ciencias Agrícolas
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CIENCIAS AGRÍCOLAS
dc.title
Enhanced kernel set promoted by synchronous pollination determines a tradeoff between kernel number and kernel weight in temperate maize hybrids
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-04-19T14:17:03Z
dc.journal.volume
105
dc.journal.number
3
dc.journal.pagination
172-181
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Uribelarrea, Martin. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina
dc.description.fil
Fil: Cárcova, Jorgelina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
dc.description.fil
Fil: Borras, Lucas. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina
dc.description.fil
Fil: Otegui, Maria Elena. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina
dc.journal.title
Field Crops Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.fcr.2007.09.002
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0378429007001955
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