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Characterization of Cucumber Germplasm (2019--2020)

IFTEKHAR AHMED
Plant Genetic Resources Centre, BARI, Joydebpur, Gazipur

Abstract/ Executive Summary:

Twenty-six accessions of cucumber (Cucumis sativus L.) were characterized at the Plant Genetic Resources Centre (PGRC), BARI, Gazipur during summer, 2019. Variability showed in different fruit characters at the edible stage i.e stem end fruit shape, blossom end fruit shape. Fruit shape was oblong, oval, ellipsoid and blossom end tapered among the accessions. Light green and yellowish-green fruit skin colour were at the edible stage. Whereas brown and yellow fruit skin colour at the mature stage was found in all accessions. In quantitative characters, days to edible fruit stage ranged from 73 to 85 respectively. Average fruit length and fruit widths were 20.33 and 6.47 cm, the number of fruit per plant ranged from 3.5 to 7.5. The maximum number of fruit per plant was obtained from RAI-209 and the minimum number of fruits per plant was recorded from IAH- 331. The highest coefficient of variation was found in fruit length (19.85 %) followed by the number of fruits per plant (18.71%) and the lowest in hundred seed weight (4.71%).

Keywords: Cucumber, Accessions, Germplasm, Agro-ecological zone, Gene bank.

Location: Plant Genetic Resources Centre (PGRC), BARI, Gazipur

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Variety and Species

Commodity: Cucumber

Objectives:

The present study was undertaken to assess the characteristics through characterization of cucumber accessions. Plant genetic resources centre, BARI has collected 241 cucumber germplasm from the different agro-ecological zone of the country and conserved in the gene bank.

Methodology:

The experiment was conducted at the Plant Genetic Resources Centre Farm, BARI, Gazipur during the period from March to June 2019. Twenty-six accessions of cucumber were included in this study. Among them, eighteen accessions seed was finally harvested. Some of the plants have died due to excessive rain just after transplanting the seedling. The materials were collected from different parts of Bangladesh. The experiment was laid out in a non replicated design. One accession represented one treatment, with two plants. The unit plot size was 2 m x 2 m maintaining 0.5 m between the plots. Treatments were randomly assigned to different plots of each block separately. After final land preparation, the bed was raised about 30 cm from the ground level. The cucumber seeds of different accessions dibbled in the pot on 12 March 2019. The seedlings were transferred to the field on 10 April 2019. Necessary intercultural operations were done throughout the cropping season for proper growth and development of the plant. The trail was made with bamboo and plastic wire for the proper growth and development of the cucumber plants. Harvesting of mature fruits continued up to the end of June 2019. Data was collected on qualitative and quantitative characters following descriptor and data were analyzed to find out the variable characters among associations of Cucumber.

Source of Information: Annual Research Report 2019-2020, Plant Genetic Resources Centre, BARI, Joydebpur, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Plant growth was indeterminate type and tendril was present in all studied accessions. The stem colour was dark green in six accessions but the rest (12 accessions) showed a light green colour stem. Medium green coloured leaves were present in 6 accessions, whereas light green coloured leaves were showed in twelve accessions. No variation was found in leaf shape, tendril presence, and leaf margin among all accessions. Stem end fruit shape was obtuse in most accessions (13) followed by acute (5) and blossom end fruit shape was flat among all accessions. Fruit skin texture at the edible stage was smooth (18) in all accessions. The maximum number of accessions (14 accessions) showed oblong fruit shape while oval (4 accessions) fruit shape was also found among the accessions. Fruit skin colour at the edible stage was light green (13 accessions) followed by dark green (5 accessions). The maximum fruit skin colour at the fully ripening stage was brown (14) followed by yellow (4).

Range, mean, standard deviation and coefficient of variations were observed. Days to staminate flower and pistilate flower ranged from 48 to 66 days and 56 to 73 days after sowing, respectively. The accessions RAI -68 takes more duration to produce a staminate and pistillate flower. Days to fruit at edible stage from 73 to 85 days after sowing. On average, internode length, leaf blade length and leaf blade width were 7.81, 14.57 and 17.79 cm, respectively. Average fruit length and fruit widths were 20.33 and 6.47 cm. The highest fruit length was recorded from RAI- 117 (30.74 cm) followed by RAI-116 (29.06 cm). The smallest fruit was obtained from AR-273 (15.66 cm). The highest fruit width was recorded from BD- 4242 (8.42 cm) followed by RAI- 116 (8.12 cm) and the lowest fruit width was obtained from IAH-273 (5.08 cm). The number of fruit per plant at the edible stage/ was ranged from 3.5 to 7.5. The maximum number of fruits per plant was obtained from RAI- 209 and the minimum number of fruits per plant was recorded from IAH-331. 100- Seed weight ranged from 2.96 to 3.48 gm. The highest coefficient of variation was found in fruit length (19.85 %) followed by fruit width (14.46%) and the number of fruits per plant (18.71%). The coefficient of variation was also high in internode length (16.01).100 seed weight showed the lowest (4.71%) coefficient of variation.

Knowledge Management: Report/Proceedings