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Suitability of Cut Corm as Planting Materials on Flowering and Corm-cormel Production of Gladiolus Cultivars

M. Mahasen
Dept. of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

A. F. M. Jamal Uddin
Associate Professor
Dept. of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

T. Taufique
Dept. of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

H. Mehraj
The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarami, Matsumaya, Ehime 790-8556, Japan

A. F. Ona
Dept. of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to study the cut corm as planting materials on flowering and corm-cormel production of gladiolus cultivars. Four different colored gladiolus viz. yellow (V₁), lemon yellow (V₂), white (V₃), pink (V₄) and cut corm viz. half corm (C₁) with whole corm (control, C₂) were used in experiment. Maximum floret number (13.0/spike), basal floret head diameter (9.2 cm) and vase life (5.2 days) was found from V₁. All the studied characters were found statistically similar result between C₁ and C₂. Use of the cut corm did not affect the significantly on the floral and reproductive characters. All cultivars were performed satisfactorily with cut corm. Number of floret/spike reduction was 10.2% in V₁, 19.7% in V₂ while no reduction in V₃ and V₄ in half corm over whole corm. Number of corm/plot was reduced 4.5% in V₁, 11.2 % in V₂ while increased 4.5% in V₃ and no reduction in V₄ in half corm over whole corm. Therefore using half corm may be beneficial for farmers by reducing half of the planting materials for gladiolus production.

Keywords: Gladiolus, Reproductive Attributes, Half Corm and Whole Corm

Location: Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Start Date: 00-10-2012

End Date: 00-03-2013

Program Area: Seed Technology

Commodity: Gladiolus

Objectives:

To select the suitable variety using half cut corm to minimize the requirement of planting materials.

Methodology:

Experimental site and duration: The present investigations were carried out at the Sher - e - Bangla Agricultural University, Dhaka, Bangladesh experimental fields from the October 2012 to March 2013.

Experimental design: A 4x2 (4 cultivars x 2 corm types) factorial experiment was laid out in a Randomized Complete Block Design with 3 replications.
Treatments of the experiment: Gladiolus variety (V₁: Yellow colored; V₂: Lemon yellow colored; V₃: White colored and V₄: Pink colored) and corm types (C₁: Half cut corm and C₂: Whole corm) were used in the experiment.
Plot size: The size of unit plot was 1.0 m x 0.6 m. The distance between the blocks was 0.5 m and between the plots was 0.5 m. The plots were raised up to 15 cm.
Procedure for the application of treatments: Large corms were cut into two sections, retaining a bud with each section. Dithane M-45 was applied to the segments and whole corm to prevent fungus. Then the segments and whole corms are treated with GA₃ to break dormancy.
Planting of the corms: Corms were planted at 7 cm depth in the plot maintaining 20 cm x 20 cm spacing. In each plot, 15 corms were planted.
Data collection: Data were collected on days to 80% germination, plant height (cm), leaf area (cm²), number of days taken for flower spike initiation (visual observation), number of days taken for first floret opening, spike length (cm), spike diameter (mm), number of floret/spike, basal floret head diameter (cm), number of daughter corms/plot, number of cormels/plot, single corm weight (g), single corm diameter (cm) and vase life. The leaf area was measured at 60 DAP using CL-202 Leaf Area Meter by destructive method. Spike length was measured from 25 cm above of the internode to fourth leaf up to tip of spike. Spike and corm diameter was measured using Digital Caliper-515 (DC-515). Vase life was measured using tap water.
Statistical analysis: Collected data were statistically analyzed using MSTAT-C computer package programme. Difference between treatments was assessed by Duncan’s Multiple Range Test (DMRT) test at 5% level of significance.

Source of Information: Journal of Bioscience and Agriculture Research, Vol. 04, Issue 01: 10-19, 2015

Article Link (Online Journal): http://www.journalbinet.com/uploads/2/1/0/0/21005390/suitability_of_cut_corm_as_planting_materials_on_flowering_and_corm_cormel_production_of_gladiolus_cultivars_%28version_2.0%29.pdf

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

V₁ (yellow) was superior in all flowering characters except spike length and diameter. Spike length was best in V₃ (white) and spike diameter in V₂ (lemon yellow) followed by V₁. In regarding leaf area, plant height, spike diameter, no. of corm/plot, no. of cormel/plot, weight of corm and diameter of corm V₂ showed best performance. Although germination percentage and leaf area were significantly affected by corm division but other vegetative, floral and reproductive parameters were not significantly influenced by cut corm application. So cut corm can be used for commercial gladiolus production and this might reduce the cost for planting materials.

Knowledge Management: Journal