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Efficacy of Plant Growth Regulators (pgrs) on Potato Mother Plant for the Production of Hybrid True Potato Seed

Tuhin Suvra Roy
Department of Agronomy Sher-e Bangla Agricultural University, Dhaka Bangladesh

Tanvir Ehsan Chowdhury
Institute of Seed Technology Sher-e Bangla Agricultural University, Dhaka Bangladesh

Rajesh Chakraborty
Department of Agronomy Sher-e Bangla Agricultural University, Dhaka Bangladesh

Md. Jafrul Islam Sumon
Department of Agronomy Sher-e Bangla Agricultural University, Dhaka Bangladesh

Md. Quamruzzaman
Department of Agronomy Sher-e Bangla Agricultural University, Dhaka Bangladesh

Abstract/ Executive Summary:

Male sterility and flower drooping are the main drawback for production of true potato seed under prevailing climatic condition of Bangladesh. Plant growth regulators (PGRs) may show the positive effect on true potato seed in potato mother plant. From this point of view, the experiment was carried to investigate the response of different plant growth regulators (PGRs) on hybrid true potato seed production. Experiment was conducted with 3 growth regulators viz.,Gibberellic Acid (GA₃), Benzyl Adenine (BA) and Planofix (NAA) with 3 replications. The experiment revealed that, all growth regulators used n this experiment had marked effect on plant height, flower production, yield component and yield of TPS. The application of GA₃@ 100 ppm in flower buds and inflorescences of female parent (MF II) resulted higher retention of flowers. Result also showed that application of 200 ppm GA₃on flowers buds and inflorescence of female was best for the reduction of flower shedding and to get a higher yield of hybrid TPS(118.0 kg ha^-1).

Keywords: True Potato Seed, Plant growth regulators

Location: Agronomy field of Sher-e Bangla Agricultural University, Dhaka-1207, Bangladesh

Start Date: 00-11-2013

End Date: 00-03-2014

Program Area: Variety and Species

Commodity: Potato

Objectives:

To investigate the response of different plant growth regulators (PGRs) on hybrid true potato seed production

Methodology:

This study was carried out at Agronomy field of Sher-e Bangla Agricultural University, Dhaka-1207, Bangladesh from November 2013 to March 2014, which was belonging to the Madhupur Tract. For production of hybrid TPS, parental lines were MF 2 as female and TPS 67 as male. There were 7 treatments of growth regulators were used in this study such as, T₁ = Control, T₂ = GA₃-100 ppm, T₃ = GA₃-200 ppm, T₄= Benzyl Adenine (BA) -100 ppm ,T₅ = Benzyl Adenine (BA) -200 ppm,T₆ = Planofix (NAA) - 2.5 ppm and T₇ = Planofix (NAA)- 5.0 ppm with three replication. Well sprouted whole tubers for both parental lines were planted by maintaining 75 cm line to line and 25 cm plant to plant distance. Furadan 5G @ 15 kg ha^-1 was added to soil to prevent the infestation of cutworm before planting. At the rates of 125 kg urea, 250 kg Triple Super Phosphate (TSP), 125 kg Murate of Potash (MOP), 100 kg gypsum, 15 kg zinc sulphate, 100 kg magnesium sulphate and 6.5 kg borax per hectare were applied at the time of planting in the furrows made on both sides of the rows. Cowdung and mustard oil cake were applied @10 tons and 500 kg per hectare, respectively, during final land preparation. After 30 DAP, 62.5 kg urea and 62.5 kg MOP per hectare were applied on both sides of the plant rows. After side dressing, the second earthingup was done. The rest 62.5 kg and 62.5 kg urea hectare-1 were applied at 50 DAP just after 3rd earthing up. Mulching, weeding and irrigation were given as per requirement. Proper plant protection measures were taken to control the fungus, virus and insects as a whole. Being the prevailing climatic condition of Bangladesh is not favored to flower the potato plant, so the natural photoperiod was extended up to 16 hrs with the use of 400 watt high pressure sodium light bulbs placed 8 m above the crop field from 25 DAP up to completion of harvesting of berries. Artificial pollination was done according to the procedures. Staking is done to prevent the lodging of both male and female parent using bamboo sticks. Pruning and trimming was also done to provide the even distribution of light and to facilitate pollination. After harvesting the berries at 45-50 DAP, seeds were crusted. The data on plant height(cm), number off inflorescence plant^-1, number of flowers inflorescence^-1,number of berries plant^-1under different sizes, Average yield of seed kg^-1berry(g), Average weight of 100 berries(g), Average weight of 1000 seeds(mg), number of seeds berry^-1 of diff. sizes, weight of 1000 seeds obtained from berries of diff. sizes (mg), total yield of berry ( kg ha^-1), total yield of seeds( kg ha^-1), total yield of berries plant^-1(g), total yield of berries plot^-1 (g), total yield of seed plant^-1 (mg) and total yield of seed plot^-1(g). The collected data were analyzed statistically and means were adjusted by using the Least Significant Difference test.

Source of Information: European Academic Research, Vol. II, Issue 12 (March 2015)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Applying the plant growth regulators it is possible to enhance the flowering and fruit setting in female parent (MF II). The application of GA3 @ 100 ppm in flower buds and inflorescences of female parent (MF II), resulted higher retention of flowers. The application of 200 ppm GA3 in the flower buds and inflorescence of female parent (MF II) demonstrate better performance in respect of quality TPS production.

Knowledge Management: Journal