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Yield Potential of Some Selected Genotypes of Lentil Grown Under Rainfed Condition

M. Tariqul Islam
Bangladesh Institute of Nuclear Agriculture P.O. Box-4,

M.A. Salam
Bangladesh Institute of Nuclear Agriculture P.O. Box-4,

M.A. Islam
Bangladesh Institute of Nuclear Agriculture P.O. Box-4,

R.K. Dutta
Bangladesh Institute of Nuclear Agriculture P.O. Box-4,

Abstract/ Executive Summary:

Three ICARDA lines (ICARDA-44123, ICARDA-44209 and ICARDA-442I0), six mutant lines (ML-18, ML-20, ML-22, ML-42, ML-442, and ML-478) and a check cultivar L-5 of lentil were grown under residual moisture condition at Tajhat, Rangpur during 1994-95. Some selected genotypes (IC-44123, IC-4429, IC44210, ML-22, ML-442, and L-5) were again evaluated in the next year. The ICARDA lines were comparatively taller, produced more primary branches and higher biomass but showed lower harvest indices and longer crop duration than most of the mutant lines and local cultivar L-5. The line IC-44123 showed higher seed weight than L-5. ML-18, ML-20, ML-22 and ML-42 out yielded L-S and matured 11-19 days earlier than the ICARD A lines but showed almost similar crop duration with L-S. ML-442 and ML-478 showed longer crop duration than L-S. Crop growth rate and net assimilation rate of different lines showed peaks at 60 days after sowing and were distinctly higher, medium and low in ICARDA lines, mutant lines and L-S respectively. Chlorophyll contents varied amongst the varieties. Yield improvements of ICARD A lines with higher harvest indices and mutant lines with higher crop growth rate or total dry matter could be the basis of future programmes.

Keywords: Yield potential, Genotypes, Lentil, Rainfed condition

Location: Tajhat, Rangpur, Sub-station of the Bangladesh Institute of Nuclear Agriculture

Start Date: 00-00-1994

End Date: 00-00-1995

Program Area: Crop-Soil-Water Management

Commodity: Lentil

Objectives:

To study the yield potentiality of some selected lines/mutants of lentil under rainfed condition.

Methodology:

Three ICARDA lines (IC-44123, IC-44209 and IC-44210), 6 mutant line (ML-18, ML-20, ML-22, ML-42, ML-442, and ML-478) and the check cultivar L-5 were grown at Tajhat, Rangpur, Sub-station of the Bangladesh Institute of Nuclear Agriculture, in the winter season of 1994-95 under residual moisture condition.The land of this farm is grouped as AEZ 2 (Active Tista Floodplain). The design of the experiment was RCBD with 3 replications. A unit plot size was 3m x 2m. The row to row spacing was 28 em and plant to plant was 6 cm. Normal cultural practices were followed throughout the growing period. A second experiment was followed next year (1995-96) with 4 selected genotypes viz. IC-44123, IC-4209, ML- 22, ML-442, and the check L-5 for the confirmity of the results of the first experiment. A total of 6 harvests was made, starting at the age of 30 days after sowing (DAS), with the first experiment only yield and yield component data were taken. The leaf area and total dry matter were recorded from randomly selected 10 plants. Crop growth rate (CGR) and net assimilation rates (NAR) were calculated from the mean leaf area and total dry matter following formulae of Radford, 1967. At maturity, numbers of primary branches per plant, total dry matter (TDM)/m², yield per m² and days to maturity were recorded. Total chlorophyll was estimated according to the method of Arnon (1949). DMRT tests were performed in evaluating the mean data. The rainfall data also presented in the same figures. Soil moisture percentage of the experimental field were determined at 10 day's intervals. For this, samples at the depth of plough pan levels were collected and fresh and oven dry weights were recorded. The soil moisture percentage was calculated.

Source of Information: Bangladesh J. Nuclear Agric. 14 : 29-34, 1998; ISSN 0258-7130

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The line IC-44123 showed higher seed weight than L-5. ML-18, ML-20, ML-22 and ML-42 out yielded L-S and matured 11-19 days earlier than the ICARD A lines but showed almost similar crop duration with L-S. ML-442 and ML-478 showed longer crop duration than L-S. Crop growth rate and net assimilation rate of different lines showed peaks at 60 days after sowing and were distinctly higher, medium and low in ICARDA lines, mutant lines and L-S respectively. Chlorophyll contents varied amongst the varieties. Yield improvements of ICARD A lines with higher harvest indices and mutant lines with higher crop growth rate or total dry matter could be the basis of future programmes.

Knowledge Management: Journal