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Variation in Morphological and Reproductive Characters and Their Relationship with Seed Yield of Some Advanced Lentil Mutants

M. A. Samad
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202. Bangladesh

M. M. Yeaqub
Deptartment of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A. K. M. Z. Hossain
Deptartment of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A. B. Puteh
Deptartment of Crop Science, University Putra Malaysia, Serdang, Selangor, Malaysia

M. A. A. Mondal
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted during November 2008 to March 2009 at the Bangladesh Institute of Nuclear Agriculture (BINA) farm, Mymensingh, Bangladesh with 10 promising lentil mutants along with mother variety BARI Masur-4 to evaluate some morpho-physiological features, reproductive characters and their impacts on seed yield. Results showed that high yielding mutants had the capacity to produce higher branches number, total dry mass production and leaf area, and better dry matter partitioning to economic yield and capacity to produce higher number of flowers than the low yielding ones. Among the 10 mutants, mutants LM-3-5 and LM-6-6 showed superiority in morpho-physiological characters which resulted to produce higher number of flowers and pods plant", and thereby produced higher seed yield than the remaining mutants and the mother variety. Based on the superior morpho-physiological characters, yield attributes and seed yield, LM-3-5 and LM-6-6 might be selected for further trial at different agro-ecological zones of Bangladesh for confirmation of the results and registration as varieties.

Keywords: Lentil, Morphological parameters, Mutants, Seed yield

Location: BINA farm

Start Date: 00-11-2008

End Date: 00-03-2009

Program Area: Variety and Species

Commodity: Lentil

Objectives:

To assess the variability in these mutants and evaluate their morpho-physiological characters, yield attributes, seed yield and reproductive efficiency.

Methodology:

Ten mutants were selected in M₆ generation derived from BARI Masur-4 through induced gamma mutagenesis. Performance of ten promising mutants viz., LM- 6-1, LM-I-2, LM-9-3, LM-7-4, LM-3-5, LM-6-6, LM-5-7, LM-2-8, LM-9-9, LM-I-I0 and a check variety of BARI Masur-4 were evaluated at BINA farm during the rabi season of 2008-2009. The experiment was laid out in a randomized complete block design with three replications. Unit plot size was 4 m x 3 m. Seeds were sown in line of 30 cm apart and two weeks after germination, the plants were thinned to 6-8 cm distance between the plants. Recommended intercultural practices, such as; weeding, thinning and application of pesticides were followed as and when necessitated for proper growth and development of the plants in each plot. Phosphorus and potash were provided during the final land preparation at the rates of 60 and 80 kg ha^-1 in the form of triple super phosphate (TSP) and muriate of potash (MP), respectively. The experiment was set on 7 November 2008 and harvested on 25 February to 7 March 2009 depending on mutants. The number of opened flowers plant^-1 was recorded from 15 randomly selected pants, 5 from each plot. The opened flowers were counted daily. Reproductive efficiency (Percent pod set to opened flowers) was calculated as follows; % pod set = (Number of pods plant^-1 -:- Number of opened flowers plant^-1) x 100. Leaf area (LA) was measured by Automatic Leaf Area Meter (Model: LAI 3000, USA). Data on plant height, number of branches, total dry matter, yield and yield attributes were recorded at maturity from 10 randomly selected plants from each plot. The yield contributing characters were recorded at harvest from ten competitive plants of each plot. For total dry mass, five plants from each plot were separated into roots, stems, leaves and pods, and the corresponding dry weights were recorded after oven drying at 80 ± 2 °C for 72 hours. Harvest index was calculated using the formula as; Harvest index = Economic yield/plot -:- biological yield/plot) x 100. The collected data were then analyzed statistically following the computer package programme, MSTAT-C.

Source of Information: Bangladesh Journal of Nuclear Agriculture. Vol: 30, pp: 81-87, ISSN 0258-7130, 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In addition to superior yield contributing attributes, a high yielding lentil genotype should posses a relatively higher number of flowers with superior morpho-physiological parameters and capacity to better dry matter partitioning to economic yield. Among the tested mutants, due to having superior morpho-physiological characters and yield, LM-3-5 and LM-6-6 might be selected for further field trial at different agro-ecological zones of Bangladesh for confirmation of the results and registration as varieties. Moreover, generation of mutants having improved yield attributes over mother variety also suggested that gamma ray irradiation could be fruitfully applied to develop mutants with higher seed yield and other improved agronomic traits in lentil.

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