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Screening of Lentil Lines Against Stemphylum Blight- 2016 - 2017

M. SHAHIDUZZAMAN
Pulses Research Centre, BARI, Ishurdi, Pabna

S. R. MALLICK
Pulses Research Centre, BARI, Ishurdi, Pabna

B. L. NAG
Pulses Research Centre, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

The present screening experiment was conducted with 10 accessions based on previous trial for Stemphylium Blight (SB) resistance. These accessions were screened in natural field environments, to identify resistance at RPRS, Madaripur sources for potential use in lentil breeding. Lentil variety BARI Masur-4 (susceptible) was used as check with consistent results throughout the experiment. The highest frequency of resistance to SB was found in BLX-09001(2.2) followed by LRIL-22-70 (3.33). The highest yield (344 kg/ha) was produced by the entry LT-06 which is statistically similar to the yield (328 kg/ha) of the entries BARI Masur-4. Upon further trial, these sources can potentially be used to develop new commercial cultivars with SB disease resistance.

Keywords: Stemphylium Blight, Lentil, Accessions, Natural environment

Location:

Start Date: 00-00-2006

End Date: 00-00-2017

Program Area: Pest Management

Commodity: Fungal Disease, Lentil

Objectives:

The present study was conducted to continue search for resistant genotypes against Stemphylium Blight (SB) disease of lentil in natural environment

Methodology:

The experiment was conducted at Regional Pulses Research Station, Madaripur during 2016-17. Nine lentil advanced entries viz. BLX-06004-2, LT-06, LT-07, LT-08, BLX-06004-12, BLX-09001, BLX-09015, LRIL22-133 and LRIL22-70 were collected from the Genetic and plant breeding division, Pulses Research Cente, Ishurdi, Pabna. Each line was sown in single row of 5m length allowing a susceptible check (BARI Masur-4) after every 2 test lines with continuous sowing seed. Two replications were used having line to line distance of 40 cm. The seeds were sown on November 21, 2016. Infected crop debris from previous year was spread between rows to build up Stemphylium inocula. The experiment was monitored regularly to observe stemphylium blight disease. Intercultural operations were done as and when necessary. The disease severity was scored according to 0-5 scale (Bakr and Ahmed 1992). The crops were harvested after maturity. Seed yield (kg/ha) was recorded from each line. The recorded data were analyzed statistically to find out the level of significance and the variations among the respective data through MSTAT-C.

Source of Information: Annual Research Report 2016 - 2017, Pulses Research Centre, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All the crop characters differed significantly from one line to another. Distribution of lentil lines in various infection categories of stemphylium blight. There was no entry graded as resistant, 1 moderately resistant, 3 moderately susceptible 2 susceptible and 1 was highly susceptible. Results of yield and yield contributing characters are presented in Table 3.3. Days to flower varied from 56-61. Days to maturity varied from 105-107. Percent mortality varied from 22.67-32.00. The highest plant mortality (foot and root rot) (32.00%) was recorded in BLX-6004-2 of which arcsine transformed mean value was 32.94 and lowest (22.67%) in BLX-06004-12 with arcsine transformed mean value 27.58. The maximum (4.40) number of branch/plant was counted in the line BLX-09001 and minimum (1.86) in LT-08. The highest plant height (24.00 cm) was recorded in LT-06 and LRIL-22-70 and lowest (20.67 cm) in LT-08. The highest number of pods/plant (21.38) was recorded in the line BLX-09001 and lowest (10.33) in the BLX-6004-2. Maximum number of seed/pod (1.63) was recorded in the line BLX-06004-12 and minimum (1.10) in BLX-6004-2. The maximum (2.26) 100 seed weight was recorded in the line BLX-09001 and lowest in LT-08 (1.10). Due to rainfall at flowering and harvesting stage many of the plants were heavily affected by stemphylium blight resulting low yield of the tested lines. All the test entries varied significantly considering their disease severity and yield. The lowest stemphylium blight disease severity was recorded in BLX-09001(2.2) followed by LRIL-22-70 (3.3). The highest severity (5.00) was in BARI Masur-4 followed by LT-08. The highest yield (344 kg/ha) was produced by the entry LT-06 and lowest (264 kg/ha) from the line BLX-06004-12.

One lentil line BLX-09001have the potentiality to continue research in regards to breeding for stemphylium disease resistance. The results from the present study would contribute to relevant scientific knowledge that will help with the development of an effective breeding strategy for SB resistance in lentil.

Knowledge Management: Report/Proceedings