Productional characteristic evaluation of croatian, american and italian clones of cv. Tribidrag

Tijekom vegetacije 2018. godine provedeno je istraživanje u svrhu evaluiranja gospodarskih karakteristika hrvatskih, američkih i talijanskih klonova sorte Tribidrag, koja je, nakon otkrića da je identična američkom Zinfandelu i talijanskom Primitivu, postala interesantna za vinare. Kako se radi o poznatoj sorti u svijetu (Americi i Italiji), na tržištu je prisutno puno klonova različitih karakteristika. Na Institut za jadranske kulture i melioraciju krša u Splitu, posađeni su 2014. godine različiti klonovi ove sorte, a 2018. je taj nasad došao u rod. Pomoću ampelografskih metoda te metodom identifikacije i opisa putem OIV-ovih deskriptora, provedena je evaluacija morfoloških i gospodarskih karakteristika kojom je dokazana morfološka varijabilnost između klonova Zinfandela i Tribidraga, a najmanje je uočena kod klonova Primitiva. Klonovi Tribidraga prednjače u prosječnim masama grozdova (g), što ukazuje na veću iskoristivost, ali imaju najmanji ukupni sadržaj šećera (°Oe). Dobiveni rezultati pokazuju da su u sadržaju ukupnih kiselina (g/L) najslabiji klonovi Zinfandela, a klonovi Tribidraga i Primitiva se kreću u sličnim vrijednostima; prosječne pH vrijednosti su gotovo pa iste. Mehanički parametri pokazuju da je grožđe evaluiranih klonova srednje zbijenosti, s mekanim do srednje tvrdim mesom bobica. Bolest siva plijesan (Botrytis cinerea) nije uočena.During the growing season of 2018, research was conducted for the purpose of evaluating economical values of Croatian, American and Italian clones of Tribidrag variety, which became interesting for winemakers after the discovery that its heritage is the same as the one of American Zinfandel and Italian Primitivo. Since it is a very famous grape variety in the world (United States of America and Italy), there are a lot of clones of different characteristics on the market. At Institute for Adriatic Crops and Karst Reclamation in Split, various clones of this variety were planted in 2014, and in 2018 this crop came into being. Using ampelographic methods and identification and descriptive methods using OIV descriptors, morphological and economic characteristics were evaluated, which demonstrated morphological variability between clones of Zinfandel and Tribidrag and was the least noticed in clones of Primitivo. The clones of Tribidrag dominated by average cluster masses (g), which indicates greater utilization, but have the smallest total sugar content (°Oe). The obtained results show that in the content of total acids (g/L), clones of Zinfandel have the least amount of acids and the clones of Tribidrag and Primitivo move in similar values; the average pH values are almost the same. Mechanical parameters show that the grapes of evaluated clones are of medium compact, with soft to medium hard berry flesh. The disease of gray mold (Botrytis cinerea) was not observed