Comparative genetic analysis of quantitative traits in sunflower (Helianthus annuus L.). 2. Characterisation of QTL involved in developmental and agronomic traits

Seed weight and oil content are important properties of cultivated sunflower under complex genetic and environmental control, and associated with morphological and developmental characteristics such as plant height or flowering dates. Using a genetic map with 290 markers for a cross between two inbr...

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Published in:Theoretical and applied genetics 2003-06, Vol.107 (1), p.181-189
Main Authors: BERT, P.-F, JOUAN, I, TOURVIEILLE DE LABROUHE, D, SERRE, F, PHILIPPON, J, NICOLAS, P, VEAR, F
Format: Article
Language:English
Subjects:
Biological and medical sciences
Chromosome Mapping
Crosses, Genetic
Flowers - chemistry
Flowers - genetics
Flowers - metabolism
Fundamental and applied biological sciences. Psychology
Genetic Linkage
Helianthus - genetics
Helianthus - growth & development
Helianthus - metabolism
Microsatellite Repeats
Molecular and cellular biology
Phenotype
Plant Oils - metabolism
Quantitative Trait Loci
Quantitative Trait, Heritable
Seeds - chemistry
Seeds - genetics
Seeds - metabolism
Sunflower Oil
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Summary:Seed weight and oil content are important properties of cultivated sunflower under complex genetic and environmental control, and associated with morphological and developmental characteristics such as plant height or flowering dates. Using a genetic map with 290 markers for a cross between two inbred sunflower lines and 2 years of observations on F3 families, QTL controlling seed weight, oil content, plant height, plant lodging, flowering dates, maturity dates and delay from flowering to maturity were detected. QTL detected were compared between the F2 and F3 generations and between the 2 years of testing for the F3 families in 1997 and 1999. Some of the QTL controlling seed weight overlapped with those controlling oil content. Several other co-localisations of QTL controlling developmental or morphological characteristics were observed and the relationships between the traits were also shown by correlation analyses. The relationships between all these traits and with resistance to Sclerotinia sclerotiorum and Diaporthe helianthi are discussed.
ISSN:0040-5752
1432-2242
DOI:10.1007/s00122-003-1237-9