Effects of direct selection on productive traits of sage (Salvia officinalis L.)
2006
Drazic, S.(Institut za proucavanje lekovitog bilja Dr Josif Pancic, Beograd (Serbia)) | Zivanovic, T.(Poljoprivredni fakultet, Beograd - Zemun (Serbia)) | Kostic, M.(Institut za proucavanje lekovitog bilja Dr Josif Pancic, Beograd (Serbia))
A cultivated sage population, originating from an autochthonous material from natural habitats, was used as a breeding material. Studied encompassed 60 clones selected from an initial population, while the best 12 were presented in this paper. The trials were carried out during 2005 and 2006. Means, variance, coefficient of variation and selection gain for plant height (cm), herb yield (g), leaf yield (g) and essential oil content (%) were analysed. The selection gain was evaluated at the selection intensity of 5 and 10%. Clones 20, 22 and 28 out of 60 clones had significantly higher means for observed traits. High values of variance and coefficients of variations for herb and leaf yields point out to the existence of variability, which is an essential condition for the beginning of selection. The application of direct selection with the use of vegetative multiplication resulted in a high selection gain for herb and leaf yields and in a low gain for the essential oil content. The selection gain was greater at the selection intensity of 5% than of 10%. It can be stated that herb and leaf yields can have a greater effect on essential oil yield per area unit than its percentage participation. The selection gain varied over years and traits.
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