Özet:

The aim of the study is to determine the effects of different rootstocks on yield and fruit quality of the Hafif Çukurgöbek (HÇG) loquat cultivar. In the experiment, HÇG loquat cultivar budded on Quince-A, Quince-C, BA-29 quince rootstocks and loquat seedlings were used. In the study, the spacing of plants with quince rootstock was 1.0 m x 0.5 m, while plants with loquat seedling rootstock was 1x1 m. Fruit pomological and yield characteristics of the cultivar/rootstock combinations in the study were determined. In order to determine the fruit quality, 50 fruits were randomly picked from each cultivar/rootstock combination, physical measurements and chemical analyzes were carried out with five replicates. In the study, fruit ripening was firstly realized on BA-29 and Quince-A rootstocks (May 17). In terms of fruit weight, fruit width and fruit length, the highest values were obtained from BA-29 rootstock (24.8 g, 35.5 mm and 37.6 mm, respectively), followed by Quince-A (23.5 g, 34.9 mm and 37.3 mm). Flesh/seed ratio was determined the highest (3.2) in Quince-A rootstock and the lowest (2.5) in loquat seedling rootstock. In terms of total soluble solids, loquat seedling rootstock had the highest value, while Quince-C rootstock had the lowest value. In terms of titratable total acidity, the highest value (0.51%) was obtained from BA-29 rootstock, while the lowest value (0.34%) was obtained from Quince-A rootstock. Rootstocks gave values close to each other in terms of "L" and "b" parameters of fruit skin and flesh color values. Differences between rootstocks in terms of "a" (red-green color) value was found to be statistically significant. In terms of yield per plant, loquat seedlings gave the highest value (1051 g), followed by BA-29 rootstock (955 g). The lowest yield value was obtained from Quince-A (587 g) rootstock. In terms of yield per trunk cross-sectional area, Quince-A (1.02 g mm-2) and BA-29 (0.99 g mm-2) gave the highest value, while Quince-C rootstock gave the lowest value (0.57 g mm-2). These differences between rootstocks were found to be statistically significant. According to the findings of the study, BA-29 rootstock were found to be more successful than other rootstocks in terms of earliness, yield and fruit quality.

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