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Mapping QTLs Regulating Morpho-physiological Traits and Yield: Case Studies, Shortcomings and Perspectives in Drought-stressed Maize
Open accessAbstract
Comparative analysis of a number of studies in drought-stressed maize (Zea mays L.) reporting quantitative trait loci (QTLs) for abscisic acid concentration, root characteristics, other morpho-physiological traits (MPTs) and grain yield (GY) reveals their complex genetic basis and the influence of the genetic background and the environment on QTL effects. Chromosome regions (e.g. near umc11 on chromosome 1 and near csu133 on chromosome 2) with QTLs controlling a number of MPTs and GY across populations and conditions of different water supply have been identified. Examples are presented on the use of QTL information to elucidate the genetic and physiological bases of the association among MPTs and GY. The QTL approach allows us to develop hypotheses accounting for these associations which can be further tested by developing near isogenic lines (NILs) differing for the QTL alleles. NILs also allow for a more accurate assessment of the breeding value of MPTs and, in some cases, may allow for the map-based cloning of the gene(s) underlying the QTL. Although QTL analysis is still time-consuming and resource-demanding, its integration with genomics and post-genomics approaches (e.g. transcriptome, proteome and metabolome analyses) will play an increasingly important role for the identification and validation of candidate genes affecting MPTs and GY.
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“Some genes [or at least quantitative trait loci (QTLs)] improve both root architecture and plant yield (Passioura, 1983(Passioura, , 2006;;Tuberosa et al., 2002;Steele et al.,”
From Breeding crop plants with deep roots: their role in sustainable carbon, nutrient and water sequestration (2011) · cites this paper as Tuberosa et al., 2002
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Metadata
- Authors
- TUBEROSA, R.
- Affiliations
- University of Bologna (IT)
- Corresponding author
- TUBEROSA, R.
- ORCID
- TUBEROSA, R.
- Venue
- Annals of Botany
- Publisher
- Oxford University Press (OUP)
- Published
- 2002-06-15
- Volume
- 89
- Issue
- 7
- Pages
- 941-963
- ISSN
- 0305-7364 (ISSN-L)
- 1095-8290
- PMC
- PMC4233811
- OpenAlex
- W2186350550
- Cited by
- 397
- References
- 247
- Citations by year
- 2026: 8 · 2025: 7 · 2024: 8 · 2023: 20 · 2022: 15 · 2021: 14 · 2020: 10 · 2019: 20 · 2018: 14 · 2017: 19 · 2016: 25 · 2015: 18 · 2014: 20 · 2013: 22 · 2012: 21
- FWCI
- 6.39
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Annals of Botany (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetics and Plant Breeding
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Crop Yield and Soil Fertility
- Keywords
- drought stress, maize, quantitative trait loci, morpho-physiological traits, grain yield, abscisic acid, root traits, near-isogenic lines, positional cloning, candidate genes, genetic background effects, water supply
- MeSH terms
- Abscisic Acid, Alleles, Chromosome Mapping, Zea mays, Disasters, Environment, Morphogenesis, Seeds, Water, Plant Roots, Quantitative Trait, Heritable, Proteome, Genomics
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