Genotype-environment interactions affecting preflowering physiological and morphological traits of Brassica rapa grown in two watering regimes

Autor: Maarten Koornneef, Hedayat Bagheri, Mohamed El-Soda, C. J. Hanhart, Martin P. Boer, Mark G. M. Aarts
Jazyk: angličtina
Rok vydání: 2014
Předmět:
genotype–environment interaction
Physiology
drought tolerance
plant
drought
Plant Science
phenotypic plasticity
Cluster Analysis
Inbreeding
Gene–environment interaction
by-environment interactions
education.field_of_study
Brassica rapa
Chromosome Mapping
food and beverages
qtl analysis
Droughts
root/shoot ratio
Phenotype
Biometris
loci
Laboratory of Genetics
Research Paper
Stomatal conductance
Genotype
root-system architecture
Quantitative Trait Loci
Drought tolerance
Population
Antagonistic fitness effect
Brassica
Flowers
Environment
Quantitative trait locus
Biology
Laboratorium voor Erfelijkheidsleer
Quantitative Trait
Heritable
Genetic variation
evolution
education
fungi
Reproducibility of Results
Water
genetic architecture
Genetic architecture
arabidopsis
Agronomy
plasticity
Plant Stomata
stomatal conductance
EPS
Zdroj: Journal of Experimental Botany, 65(2), 697-708
Journal of Experimental Botany 65 (2014) 2
Journal of Experimental Botany
ISSN: 0022-0957
Popis: Plant growth and productivity are greatly affected by drought, which is likely to become more threatening with the predicted global temperature increase. Understanding the genetic architecture of complex quantitative traits and their interaction with water availability may lead to improved crop adaptation to a wide range of environments. Here, the genetic basis of 20 physiological and morphological traits is explored by describing plant performance and growth in a Brassica rapa recombinant inbred line (RIL) population grown on a sandy substrate supplemented with nutrient solution, under control and drought conditions. Altogether, 54 quantitative trait loci (QTL) were identified, of which many colocated in 11 QTL clusters. Seventeen QTL showed significant QTL–environment interaction (Q×E), indicating genetic variation for phenotypic plasticity. Of the measured traits, only hypocotyl length did not show significant genotype–environment interaction (G×E) in both environments in all experiments. Correlation analysis showed that, in the control environment, stomatal conductance was positively correlated with total leaf dry weight (DW) and aboveground DW, whereas in the drought environment, stomatal conductance showed a significant negative correlation with total leaf DW and aboveground DW. This correlation was explained by antagonistic fitness effects in the drought environment, controlled by a QTL cluster on chromosome A7. These results demonstrate that Q×E is an important component of the genetic variance and can play a great role in improving drought tolerance in future breeding programmes.
Databáze: OpenAIRE
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