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 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.
Bert
P-F
PF
UMR 1095 INRA - Université Blaise Pascal "Amélioration et Santé des Plantes", 24 avenue des Landais, 63177 Aubière Cedex, France.
Jouan
I
I
Tourvieille de Labrouhe
D
D
Serre
F
F
Philippon
J
J
Nicolas
P
P
Vear
F
F
D002874:Chromosome Mapping; D003433:Crosses, Genetic; D035264:Flowers / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D008040:Genetic Linkage; D006368:Helianthus / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D018895:Microsatellite Repeats; D010641:Phenotype; D010938:Plant Oils / Q000378:metabolism*; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable; D012639:Seeds / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D000074242:Sunflower Oil
D010938:Plant Oils; D000074242:Sunflower Oil