Mapping and Tagging of Simply Inherited Traits - Genetics, Genomics and Breeding of Crop Plants - page 116

4
Mapping and Tagging of Simply
Inherited Traits
Volker Hahn 1 * and Silke Wieckhorst 2
ABSTRACT
This chapter summarizes the studies about the identification of simply
inherited traits in sunflower. The understanding of how a trait is
inherited, combined with the identification of molecular markers linked
to the trait will lead to an improvement of molecular breeding
programs of sunflower. As a lot of work was published regarding
disease resistances, this chapter emphasizes on simply inherited disease
resistances with a focus on downy mildew and broomrape. Other
important simply inherited traits are herbicide resistances, male
sterility, seed quality traits and morphological traits.
Keywords: gene mapping; single traits; resistance; male sterility; seed
quality; morphological traits
4.1 Introduction
The fundamental goal of genetic linkage mapping is gene discovery.
Identification of genes conditioning economic traits, their mode of expression
and nature of interactions provide breeders the greatest leverage in
manipulating the traits to the desired phenotypes. Although agronomically
important traits such as yield or drought resistance are influenced by
1 Universität Hohenheim, Landessaatzuchtanstalt, Fruwirthstr. 21, 70593 Stuttgart,
Germany.
2 Technische Universität München, Wissenschaftszentrum Weihenstephan für Ernährung,
Landnutzung und Umwelt, Lehrstuhl für Pflanzenzüchtung, Am Hochanger 4, 85350
Freising, Germany.