Statistical assessment of the influence of Fercal rootstock on some agrobiological and growth traits of Misket Rusenski and Super Ran Bolgar table vine cultivars (Vitis vinifera L.)
1Institute of Agriculture and seed science „Obraztsov chiflik”, 7007 Rousse, 1, Prof. Ivan Ivanov Str., Bulgaria
2Agricultural University, 4000 Plovdiv, 12, Mendellev bulv., Department Genetics and plant breeding, Bulgaria
Резюме
The influence of the rootstock is of a significant importance in terms of the growth power and agrobiological traits of the vine cultivar. The study included two dessert vine varieties
- Misket rusenski and Super ran Bolgar, grafted on two rootstocks - SO4 (widely used in
the practice and accepted as control in the researches) and Fercal. The study took place
at the experimental vineyards of IASS “Obraztsov chiflik” – Rouse in four replications,
11 plants each, as first class vines, equal in vegetation development were used. In both
cultivars, during the vegetation, the values of 15 agro-biological and growth traits were
registered. Data obtained were statistically analyzed using the evaluation criteria F – Fisher
and t – Student, in order the influence of Fercal rootstock on the agrobiological and growth
traits of both cultivars to be more precisely estimated.
Using t — Student criterion significant differences were found in 13,3% of all the traits,
where Fercal rootstock was used. In Super ran Bolgar cultivar the traits were “number of
shoots” and “length of internode”, and in Misket Rusenski — “number of shoots”, “including
fruiting shoots”. By applying Fisher’s criterion in order the influence of the rootstock to
be evaluated, significant differences were found in double more traits. Expressed as a percentage — 26,7% for Super ran Bolgar (number of developed shoots of a vine, yield, girth
of the rootstock and length of the berry) and 33,3% for Misket rusenski cultivar (number of
developed shoots, number of clusters, fruit-bering coefficient, girth of the graft and length
of the berry). The coincidence of some of the traits proved the universal influence of the
rootstock on the growth and yield in both cultivars.
In such studies it is recommended the both criteria for statistical analysis to be used,
because of the different level of variability of the traits. Thus a fuller adequate assessment
of the influence of the different rootstocks on the development and productive qualities of
the vines is being achieved.
Key words: Rootstocks, Statistical assessment, Table vine cultivars
