Variation of fruit morphometric parameters of date plum (Diospyros lotus L.) germplasm collection

O. Grygorieva, S. Klymenko, Yu. Vinogradova, O. Vergun, J. Brindza
The aim of this study was to determine morphometric differences of fruits and seeds among date plum (Diospyros lotus L.) genotypes. Studied trees of D. lotus have been growing more than 45 years in Arboretum Mlynany (Slovakia) from the seeds received in 1970 from Korea, China and Japan. The differences in weight, shape, size and color of fruits and seeds were noted. Fruits can be divided according to the color of the inner flesh into the forms with light and dark pulp. The morphometric parameters were following: fruit weight from 0.24 to 7.74 g, fruit length from 9.62 to 22.07 mm, fruit diameter from 9.80 to 23.64 mm, seed weight from 0.09 to 1.71 g, seed length from 6.89 to 16.18 mm, seed width from 3.40 to 9.94 mm, seed thickness from 1.93 to 5.08 mm and number of seeds in the fruit from 0 to 9. The shape indexes of fruits and seeds varied from 0.75 to 1.28 and from 1.32 to 2.40, respectively. The analysis of coefficient of variation showed the difference of variability of morphological signs between D. lotus samples. Data showed that the most variability of important selection signs are the number of seeds in fruit - from 16.98 to 82.35%, seed weight - from 9.11 to 57.61% and fruit weight - from 8.59 to 32.17%. The results indicated very high correlations between fruit weight and fruit diameter (r=0.952). High correlations were observed between fruit height and seed height (r=0.870), seed width and fruit diameter (r=0.782) and fruit weight (r=0.764). The presence of three groups of genotypes was revealed. The characteristics inheriting for each group were described in detail. Two individuals have the largest fruits (big size and big weight) and may be used in further breeding work as edible cultivars.
Grygorieva, O., Klymenko, S., Vinogradova, Yu., Vergun, O. and Brindza, J. (2021). Variation of fruit morphometric parameters of date plum (Diospyros lotus L.) germplasm collection. Acta Hortic. 1324, 271-278
DOI: 10.17660/ActaHortic.2021.1324.42
Diospyros lotus, fruits, seeds, morphometric parameters

Acta Horticulturae