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Study of the Performance of Four Biclonal Stocks and Their Three Parental Clones as Controlon the Yield and Quality of Tea

M.I. Hossain
1CSO,
Botany Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar.

M.A. Aziz
2PSO,
Botany Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar.

M.R. Arefin
3SO
Botany Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar.

M. Ali
4Director,
Bangladesh Tea Research Institute, Srimangal, Moulvibazar.

M.M.Rahman
5,6&7Professor,
Deprtment of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Ashrafuzzaman
5,6&7Professor,
Deprtment of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A. Hossain
5,6&7Professor,
Deprtment of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The present study was conducted to investigate the long term yield and quality performances of four biclones of tea namely BTS1, BTS3, BT3xTV18, TS463 and their parental clones as control (BT1, TV1 & TV19). The results of the experiment revealed that, at immature stage i.e. 1^st year to 5^th year after plantation, except 2^nd and 3^rd year, their yield differences were significant in 1^st, 4^th and 5^th year. The biclone BT3xTV18 gave highest yield of 709.8g/plant and 2267.3 kg/ha made tea compared to parental clones except TV19. Again, at mature stage amongst the four biclones BT3xTV18 gave the highest significant yield of 1160.5g/plant and 3707 kg/ha made tea compared to parental clones except TV19 which is a famous yield clone of India. The overall cup quality of the test clones and the control was assessed by conventional organoleptic test. The cup quality of biclone BT3xTV18 was found to be above average while cup quality of control TV1 was excellent. Considering yield and quality potentials, the biclone BT3xTV18 appeared quite promising to be released.

Keywords: Tea,Yield performance, Cup quality, Biclones.

Location:

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Tea

Objectives:

To study the longterm yield and quality performances of four biclonal stocks (BTS1, BTS3, BT3xTV18, TS463) and their parental clones as control (BT1, TV1 &TV19).

Methodology:

The experiment was carried out to study the comparative performance of four biclonal stocks (BTS1, BTS3, BT3xTV18 and TS463) and their parental clones as control (BT1, TV1 & TV19) in the BTRI experimental farm, during the period from 21^st May, 2002 to December, 2016. The experiment was laid out in Randomized Complete Block Design with four replications. Each plot was 5 m x 5 m in size with 120 cm (row-row) x 60 cm (plant-plant) spacing. There were 25 plants per plot. A standard clone BT1, two renowned Indian clones TV1 and TV19 were used as parental lines as well as control for yield and quality comparison. TV19 is the “Yield Clone” of India. In general, the yield & quality of seed variety, which is mainly under general seed plant, biclone or polyclone is lower than the clonal varieties of tea. The experiment was conducted in rain-fed condition. Yield data was collected during the cropping seasons throughout the experimental period. Fertilizer mixture was applied as per BTRI recommendations (BTRI Pamphlet nos. 21 & 22). Young and mature tea pruning were followed as per BTRI recommendations (BTRI Pamphlet nos. 79) for young tea:-Decentre-Prune-Skiff-Prune-Skiff and for mature tea (BTRI Pamphlet nos. 111) Light prune-Deep skiff-Medium skiff-Light skiff. The green leaf was harvested at weekly interval during the plucking season starting from mid-March to mid-December throughout the experimental period. Yield data were recorded and analyzed statistically using MSTAT programme in a microcomputer. The mean values were adjusted by DMRT. The yield was expressed as mean yield of green leaf g plant^-¹ and is presented separately for immature (1st - 5th year) and mature (6th-14th year) stage. The made tea (kg ha^-1) was also calculated on the basis of 23% recovery from green leaf. The quality performances of manufactured tea by CTC method in the BTRI mini tea factory. Quality of all the test clones and control were assessed weekly by conventional organoleptic test and scored numerically.

Source of Information: ea J. Bangladesh, 44: 1-08, 2015 ISSN: 0253-5483

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the yield performances and quality standard throughout the study period compared to the parents (BT1, TV1 and TV19), the biclone BT3xTV18 appeared superior to be released as a new biclonal stock. The biclonal stock TS463 was also found prospective in quality characters and yield and can be used as valuable breeding stock.

Knowledge Management: Journal