Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 1
Written by Rangel DRAGOV, Krasimira TANEVA, Boryana HADZHIIVANOVA, Maria VIDEVA, Boyana TODOROVA, Rositsa CHOLAKOVA
The aim of the study is to determine the genetic nature of quantitative traits associated with productivity in durum wheat and to make recommendations for optimizing the breeding process in the early segregating generations. A diallel cross without reciprocals, was carried out at the Field Crops Institute - Chirpan, with five modern durum wheat varieties. Six quantitative traits were studied. The inheritance of productivity tillering is governed by overdominance, and is possible selection of genotype by phenotype, but in the later segregating generations. For traits such as plant height and thousand kernel weight, inheritance is controlled by incomplete dominance, and genotype selection by phenotype is possible in F2. The inheritance of spike length is determined by overdominance, and is possible selection of genotype by phenotype in the later segregating generations. The spikelets number per spike is inherited through overdominance, and selection of genotype by phenotype is possible but should be carried out in the later segregating generations. The grains weight per spike is influenced by overdominance, and genotype selection by phenotype is possible after F5.
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