Genetic and environmental dissection of biomass accumulation in multi-genotype maize canopies

Abstract : Multi-genotype canopies are frequent in phenotyping experiments and are of increasing interest in agriculture. Radiation interception efficiency (RIE) and radiation use efficiency (RUE) have low heritabilities in such canopies. We propose a revised Monteith equation that identifies environmental and genetic components of RIE and RUE. An environmental term, a component of RIE, characterizes the effect of the presence or absence of neighbours on light interception. The ability of a given plant to compete with its neighbours is then identified, which accounts for the genetic variability of RIE of plants having similar leaf areas. This method was used in three experiments in a phenotyping platform with 765 plants of 255 maize hybrids. As expected, the heritability of the environmental term was near zero, whereas that of the competitiveness term increased with phenological stage, resulting in the identification of quantitative trait loci. In the same way, RUE was dissected as an effect of intercepted light and a genetic term. This approach was used for predicting the behaviour of individual genotypes in virtual multi-genotype canopies. A large effect of competitiveness was observed in multi-genotype but not in single-genotype canopies, resulting in a bias for genotype comparisons in breeding fields.
Document type :
Journal articles
Complete list of metadatas

Cited literature [47 references]  Display  Hide  Download

https://hal.inria.fr/hal-01895279
Contributor : Christophe Pradal <>
Submitted on : Monday, October 15, 2018 - 8:31:52 AM
Last modification on : Monday, December 23, 2019 - 11:04:25 AM
Long-term archiving on: Wednesday, January 16, 2019 - 1:25:44 PM

File

ery309(1).pdf
Files produced by the author(s)

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Tsu-Wei Chen, Llorenç Cabrera-Bosquet, Santiago Alvarez Prado, Raphael Perez, Simon Artzet, et al.. Genetic and environmental dissection of biomass accumulation in multi-genotype maize canopies. Journal of Experimental Botany, Oxford University Press (OUP), 2019, 70 (9), pp.2523-2534. ⟨10.1093/jxb/ery309⟩. ⟨hal-01895279⟩

Share

Metrics

Record views

480

Files downloads

117