Mapping quantitative trait loci for flag leaf senescence as a yield determinant in winter wheat under optimal and drought-stressed environments

The timing of flag leaf senescence (FLS) is an important determinant of yield under stress and optimal environments. A doubled haploid population derived from crossing the photo period-sensitive variety Beaver,with the photo period-insensitive variety Soissons, varied significantly for this trait, m...

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Bibliographic Details
Published in:Euphytica 2004-01, Vol.135 (3), p.255-263
Main Authors: VERMA, Vinesh, FOULKES, M. J, WORLAND, A. J, SYLVESTER-BRADLEY, R, CALIGARI, P. D. S, SNAPE, J. W
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Amplified fragment length polymorphism
Biological and medical sciences
Chromosomes
Drought
Flags
Fundamental and applied biological sciences. Psychology
Gene mapping
Gene polymorphism
Genetic analysis
Genetic control
Genetics
Genetics and breeding of economic plants
Genomics
Leaf area
Polymorphism
Quantitative trait loci
Senescence
Triticum
Winter wheat
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Summary:The timing of flag leaf senescence (FLS) is an important determinant of yield under stress and optimal environments. A doubled haploid population derived from crossing the photo period-sensitive variety Beaver,with the photo period-insensitive variety Soissons, varied significantly for this trait, measured as the percent green flag leaf area remaining at 14 days and 35 days after anthesis. This trait also showed a significantly positive correlation with yield under variable environmental regimes. QTL analysis based on a genetic map derived from 48 doubled haploid lines using amplified fragment length polymorphism (AFLP) and simple sequence repeat (SSR) markers, revealed the genetic control of this trait. The coincidence of QTL for senescence on chromosomes 2B and 2D under drought-stressed and optimal environments, respectively, indicate a complex genetic mechanism of this trait involving the re-mobilisation of resources from the source to the sink during senescence.
ISSN:0014-2336
1573-5060
DOI:10.1023/b:euph.0000013255.31618.14