SUMMARYThe paper was written based on a study conducted in a nursery in the north of Montenegro during three successive years. The study had helped author of this paper to examine the possibility of producing one-year old seedlings of commercial medlar cultivars (Mespilus germanica L.) grafted on quince Ba 29 and wild pear generative rootstocks (Pyrus communis L.) during the first year after bud grafting. The aim of this study is to determine morphological characteristics, compatibility of commercial medlar seedling cultivars (Domestic medlar, Pomoravka -seedless medlar genotype, Royal medlar, Medlar without seeds) with the quince Ba 29 and wild pear generative rootstocks and water attaining capability of the leaves in one-year old seedlings of commercial medlar cultivars.The results of this study also showed that the water attaining capability of the leaves in one-year old seedlings of commercial medlar cultivars (Mespilus germanica L.) as an indicator of their resistance to drought was genetic characteristics of the cultivars.

The study was conducted in three successive years to examine the compatibility and verdure in nursery trees of autochthonous peer cultivars grafted on Quince MA and wild peer seedlings (Pyrus communis L) during the first year after bud grafting. The aim of this paper is to determine compatibility and verdure of autochthonous peer seedling sorts (Pecanka, Jerebasma, Lubenicarka, Sinka, Tursijaca and Jarac) with the Quince MA and wild peer seedlings (Pyrus communis L). The severity of incompatibility varies between varieties but is always more severe with Quince MC than Quince MA. The incompatibility expresses itself in several ways. Firstly a poor ?bud? or ?graft? take in the nursery will be evident, secondly even if growing successfully in the nursery very often when ?lifted? breakages (brittle unions) occur between rootstock and scion and thirdly ?delayed? incompatibility where again the union between rootstock and scion breaks suddenly in later years, this is unpredictable and can often happen when there is a heavy crop load assisted by strong autumnal winds. The production of seedling material of autochthonous sorts with vegetative rootstocks Quince MA will be enormous contribution for even partially saving of fruit genofond that is the unity product of our ecological environment and autochthonous biocenosis.

This paper presents the fruit thinning response to NAA and BA plant regulators of apple cultivars 'Prima', 'McIntosh' and 'Jonathan'. The experiment was designed to evaluate the effects of NAA applied at three concentrations, 15, 20 and 30 ppm, and BA + NAA combinations (BA-60, 100, 120 or 140 ppm + NAA 5 ppm) for fruit thinning of the assessed apple cultivars. All the applied treatments with NAA and BA + NAA adequately thinned fruits of 'McIntosh' and 'Jonathan' cultivars, whereas application of NAA at the concentration of 20 and 30 ppm and combined treatment of BA 140 ppm+ NAA 5 ppm were effective fruit thinners for 'Prima' cultivar. In terms of the average fruit weight and number of fruits categorized as large (> 75 mm or > 65 mm), as well as from the aspect of fruit number per trunk cross-sectional area, the variant of treatment with BA 140 ppm + NAA 5 ppm was the most effective on 'McIntosh' and 'Prima' cultivars, whereas BA 100 ppm + NAA 5 ppm had the best effect on 'Jonathan' cultivar.

This paper presents the fruit thinning response of some commercial apple cultivars to NAA and BA plant regulators. The experiment was designed to evaluate NAA applied separately at three concentrations-13.2 ppm, 17.82 ppm and 26.73 ppm, and BA + NAA combinations (BA-60 ppm, 100 ppm, 120 ppm or 140 ppm + NAA 4.29 ppm) for thinning the assessed apple cultivars. All treatments with NAA and BA + NAA adequately thinned 'McIntosh' and 'Jonathan', whereas the application of NAA 17.82 ppm and 26.73 ppm and the combined treatment BA 140 ppm+ NAA 4.29 ppm were effective fruit thinners for 'Prima'. In terms of the average fruit weight, number of fruits categorized as large (> 75 mm or > 65 mm), and number of fruit per trunk cross-sectional area, the treatment BA 140 ppm + NAA 4.29 ppm was most effective on 'McIntosh' and 'Prima', whereas BA 100 ppm + NAA 4.29 ppm had the best effect on 'Jonathan'.

SUMMARYPlum is the major fruit species in the area of North Montenegro. A study conducted over a period of 4 years in North Montenegro region included in situ identification of autochthonous plum cultivars. Observation and recording of their phenological and pomological traits were performed using IBPGR and UPOV methodologies. Flowering started between 26th March and 12th April and fruit ripening between 13th July (Petrovača) and 18th September (Trnovača). Fruit weight ranged from 6.65 ± 0.235 g to 53.88 ± 0.654 g and stone weight from 0.16 ± 0.003 g to 2.20 ±0,711 g. The cultivars were classified as being extremely small in terms of fruit size, except for cv. Crvena durgulja (bigger fruit size). Rounded fruit shape and light green ground color were dominant. Skin color ranged from amber to black. Yellow green was a dominant flesh color and medium flesh firmness predominated. The fruits of the above cultivars could be processed, particularly into plum brandy, or they could be used fresh or dried. The selected plum cultivars can be used both in breeding programs and as cultivars for organic plum orchards. This study was made to assess the performance of autochthonous plum cultivars (in situ) and seedling. Producing process consisted of 2 stages: a) initial selection from the population and pomological characterization, b) morphological and quantitative characteristics of one-year old seedlings for autochthonous brandy varieties of plum on Myrobalan seedling (Prunus cerasifera Erhr.).