Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 2
Written by Rangel DRAGOV, Krasimira TANEVA, Boryana HADZHIIVANOVA, Maria VIDEVA, Boyana TODOROVA, Rositsa CHOLAKOVA
The aim of the study is to determine the genetic system controlling traits related to productivity in durum wheat and to identify the parents and their correct usage for achieving optimal results. A diallel cross without reciprocals was conducted with five modern durum wheat varieties at the Field Crops Institute - Chirpan. The inheritance of traits involves incomplete, complete and overdominance. Productivity tillering, spikelets number per spike and grain weight per spike are controlled by a simply additive-dominant genetic system with epistasis from complementary type. For the traits: plant height, spike length, and thousand kernel weight, the inheritance control is accomplished by a simply additive-dominant genetic system. All traits increased by accumulation of dominant genes, except productivity tillering. Complexly breeding valuable genotype with more dominant gene simultaneously several traits are the variety Progress. It can be successfully used to improve the traits related to productivity in durum wheat breeding programs.
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