Mapping and Tagging of Simply Inherited Traits - Genetics, Genomics and Breeding of Crop Plants - page 117

multiple genes, many traits exist that are simply inherited, at least at first
sight. The genetics of sunflower and the inheritance factors of morphological,
resistance, and quality traits are summarized in Miller and Fick (1997).
For gene mapping, a crucial prerequisite is a genetic map. Different
genetic maps constructed in sunflower are described in the Chapter 3.
However, the simple sequence repeat (SSR) marker-based maps published
by Tang et al. (2002) and Yu et al. (2003) are considered as public sunflower
reference maps. A great help in further characterization of the mapped loci
will be the expressed sequence tags (EST) published in the Compositae
Genome Project Database (CGPDB, http://cgpdb.ucdavis.edu ). The database
now contains approximately 93,500 cultivated sunflower EST sequences
corresponding to approximately 31,600 unique genes. Available sequence
data are being already utilized for a variety of purposes.
This chapter summarizes numerous studies investigating mapping and
tagging of simply inherited traits in sunflower. Table 4-1 provides information
regarding traits, loci, mapping populations, linkage groups (LG), and the
corresponding references. Figure 4-1 depicts the approximate positions of the
mapped loci in relation to the SSR markers described in Tang et al. (2002).
Figure 4-1 The approximate positions of 38 mapped loci governing simply inherited
traits in the public sunflower SSR map.