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dc.contributor.author
Hisse, Ignacio Ruben
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dc.contributor.author
D'andrea, Karina Elizabeth
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dc.contributor.author
Otegui, Maria Elena
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dc.date.available
2023-08-17T18:02:46Z
dc.date.issued
2022-07
dc.identifier.citation
Hisse, Ignacio Ruben; D'andrea, Karina Elizabeth; Otegui, Maria Elena; Genetic analysis of maize grain yield components and physiological determinants under contrasting nitrogen availability; Csiro Publishing; Crop and Pasture Science; 74; 3; 7-2022; 182-193
dc.identifier.issn
1836-0947
dc.identifier.uri
http://hdl.handle.net/11336/208638
dc.description.abstract
Context: Most maize breeding is conducted under high-input conditions, with nitrogen supply being crucial due to its impact on yield. Aims: This study aimed to investigate broad-sense heritability, and general and specific combining ability variances of physiological traits defining grain yield under contrasting soil nitrogen supply. Methods: A six-parent full diallel cross was analysed under high (fertilised with 200 kg N/ha) and low (unfertilised control) nitrogen supply in two seasons. We measured kernel number per plant and kernel weight, the associated traits of plant growth during the critical and grain-filling periods, and source-sink relationships in both periods. Key results: Heritabilities of traits ranged from 0.54 to 0.88, and general surpassed specific combining ability for most traits. At low nitrogen (1) the relative importance of general combining ability estimated by Baker's ratio increased across traits (low nitrogen: 0.90 vs high: 0.85) because the decrease in combining ability variance was larger for specific than general (-78% vs -39%), and (2) source-sink relationship during grain filling had the highest Baker's ratio (0.96) and heritability (0.78). Plant growth rates during the critical period and kernel number increased substantially at high nitrogen (40 and 34%, respectively), and they had the highest heritability (0.79 and 0.88) and Baker's ratio (>0.90). Conclusions: Low nitrogen environments increased the relative importance of general combining ability effects, and high yield can be obtained by improving the source-sink relationship during grain filling, whereas high nitrogen increased yield by improving plant growth rate during the critical period and kernel number. Implications: Knowledge of source-sink relationship during effective filling period, plant growth during the critical period and kernel number may result in a more targeted selection program.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Csiro Publishing
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ADDITIVE GENETIC EFFECTS
dc.subject
CORN CROP
dc.subject
DOMINANCE GENETIC EFFECTS
dc.subject
F 1HYBRID
dc.subject
FULL DIALLEL MATING DESIGN
dc.subject
MAIZE BREEDING
dc.subject
PLANT GRAIN YIELD
dc.subject
SECONDARY ATTRIBUTES
dc.subject
SOIL NITROGEN CONTENT
dc.subject.classification
Agricultura
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dc.subject.classification
Agricultura, Silvicultura y Pesca
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Genetic analysis of maize grain yield components and physiological determinants under contrasting nitrogen availability
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-07T13:12:32Z
dc.identifier.eissn
1836-5795
dc.journal.volume
74
dc.journal.number
3
dc.journal.pagination
182-193
dc.journal.pais
Australia
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dc.journal.ciudad
Clayton South
dc.description.fil
Fil: Hisse, Ignacio Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
dc.description.fil
Fil: D'andrea, Karina Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
dc.description.fil
Fil: Otegui, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.journal.title
Crop and Pasture Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.publish.csiro.au/CP/CP22111
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1071/CP22111
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