Combining ability effects were estimated for different agronomic characters in line × tester crossing program comprising 21 hybrids produced by crossing 7 lines and 3 testers. Parents and hybrids differed significantly for general combining ability (GCA) and specific combining ability (SCA) effects, respectively. The variance due to GCA and SCA showed that gene action was predominantly additive...

Abstract Caraway ( Carum carvi ) is a medicinal and aromatic plant of the Apiaceae family with long history cultivation. To this day, improvements in yield essential oil content are desirable. In past, line breeding was used to increase final intention combining inbred lines synthetic variety by outcrossing. Outcrossing should overcome inbreeding depression exploit heterosis vice versa. study, ...

inheritance of several yield-based drought resistance indices was studied by a halfdiallel method using seven winter wheat varieties. the parental lines were such chosen as to represent a broad range of drought stress resistance. the experiment was conducted in a split-plot design at the research farm, faculty of agriculture, zanjan university, iran, in 1998. irrigated vs. rainfed regimes w...