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This paper presents the five-year long research results (2007-2011) of  phenological observations (beginning, full flowering and the end of  flowering), morphometric analysis (fruit weight, length, width and thickness  of fruit, as well as length and width of the hilum), the ripening time and  the average yield of selected genotypes of sweet chestnut (Castanea sativa  Mill.). The results show that in terms of time of flowering chestnut trees  examined in the group are very early flowering. The ripening of studied  chestnut trees shows that the earliest harvest tree was Ostros II, VII and  Kostajnica V (09.11.), and Kostajnica III (14.11.) were the latest. The  average fruit weight of the selected sweet chestnut trees was (6.9 g). The  highest average fruit weight (10.6 g), had the examined Ostros I tree, and  the lowest (4.8 g), Kostajnica VI. The yield of the tested chestnut trees was  on average (76.3 kg / tree). The selected trees Kostajnica II (66.0 kg /  tree), Kostajnica I (69.0 kg / tree) had the smallest yield and Ostros VI  (94.0 kg / tree) and Ostros V (87.0 kg / tree) had the highest. Obviously it  can be concluded that population genetic variability is very high and gene  expression is highly affected in tested samples on both locations. For  further research it should be given attention to investigate genotypes in  controlled conditions, the best in vitro in tissue culture. [Projekat  Ministarstva nauke Republike Srbije, br. TR-20013 i br. TR-31064

genetika

Effect of ecological conditions on expression of biopomological characteristics of chestnut (Castanea sativa Mill.) in natural populations of Montenegro