ABSTRACT
Yield has considerably varied from year to year (see Figure 7.1). On average, the yield even decreased, as a result of three extreme drought years (2003, 2007, and 2010) (see Figure 7.2). Therefore, drought resistance becomes an additional breeding objective (see Section 3.4). Extreme weather conditions have increasingly occurred over the past decade, which are reected in more and more spring droughts. Generally, these occurrences apply to all cereal species, but the light locations, in which rye is mainly grown, have been particularly affected.
