Published in Scientific Papers. Series A. Agronomy, Vol. LXVI, Issue 1
Written by Valentina DIMITROVA, Minka KOLEVA
The aim of this study was by means of diallel analysis of fiber length of F1 cotton hybrids to establish some genetic parameters and inheritance indexes necessary for specifying the breeding strategy by this character and breeding value of parental forms. The hybrid populations of two diallel combinations, each involving 6 parental components, were studied. A half diallel crossing scheme was used including the parents and one set of F1 hybrids from direct crosses. Each diallel combination was tested in replicated trials in two consecutive years. It was found that additive and non-additive gene effects participated in the genetic control of fiber length. The main component of genetic variance was of non-additive type (dominance and epistasis). The varieties Darmi, Mytra and Dorina, from the 1st diallel combination, and Natalia, from the 2nd diallel combination, were identified as good general combiners for this trait.
[Read full article] [Citation]
