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Evaluation of Five Advanced Lentil Mutants in Relation to Morpho-physiological Characters and Yield

M. Monjurul Alam Mondal, PhD
Principal Scientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

R. K. Dutta
Chief Chientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Experiments were performed with five promising lentil mutants, N₁M-154, N₅I-509, N₅I-512, N₄M-422, E₅M-1023 and BARImasur-2 to evaluate some morpho-physiological features and its impact on seed yield. Results revealed that plant height, chlorophyll and leg-haemoglubin content had no significant influence on seed yield whereas leaf area , TDM production and higher AGR at early growth stages had significant influence on seed yield and yield components. Results indicated that genotype improvement efforts have achieved higher seed yield by higher growth rate at early growth stages and better assimilate partitioning to economic yield, and bushy plants are unlikely to improve harvest index in lentil. Two mutants, N₅I-512 and N₄M-422 had medium plant stature with moderate biomass production capacity and improved harvest index thereby increased yield. This information may be used in future plant breeding programme.

Keywords: Growth, Lentil, Mutants, Yield

Location: Experimental farm, Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 12-11-2003

End Date: 26-03-2004

Program Area: Variety and Species

Commodity: Lentil

Objectives:

To study the morphological and physiological, relationship with seed yield in advanced lentil mutant lines.

Methodology:

The experiments were conducted at research farm of Bangladesh Institute of Nuclear Agriculture, Mymensingh during winter season of 2003 and 2004. Five elite lentil mutants (N₁M-154, N₅I-509, N₅I-512, N₄M-422, E₅M-1023) developed by sodium azide application was evaluated in this study. The experiment was laid out in a randomized complete block design with three replicates. The unit plot size was 2.5 m × 2.0 m with plant spacing of 30 cm × 5-6 cm. Recommended intercultural practices were followed in both years. To study ontogenetic growth characteristics, a total of six harvests were made. Ten plants were randomly sampled for growth parameters from 40 DAS and continued at an interval of 10 days up to 90 DAS. The plants were separated into roots, stems, leaves and pods, and the corresponding dry weights were recorded after oven drying at 80 ± 2 ⁰C for 72 hours. The growth analysis was carried out following the formulae of Hunt (1978). Chlorophyll content and nitrate reductase activity in leaves, leg-haemoglubin content in nodule and photosynthesis rate in leaves were determined at 65-70 DAS (flowering and fruiting stages). Leaf area of each sample was measured at 90 DAS. The yield contributing characters were recorded at harvest from ten competitive plants of each plot. The seed yield was recorded from five rows of each plot (1.5 m × 2.0 m) and converted into seed yield ha^-1. All data were analyzed statistically.

Source of Information: Bangladesh Journal of Crop Science, 18 (2): 367-372 (2007)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

High yielding lentil genotype should posses a relatively higher growth rate at early growth stages and having capacity to better dry matter partitioning to economic yield. Among the mutants/cultivar, N₅I-512 produced the highest seed yield ha^-1 with greater dry matter partitioning to economic yield.

Knowledge Management: Journal