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Variability, Correlation and Path Analysis in Lablab Bean (lablab Purpureus L.)

M. SALIM
Scientific Officer
Hill Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Khagrachari

S. HOSSAIN
Scientific Officer
Hill Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Khagrachari

S. ALAM
Scientific Officer
Regional Agricultural Research Station, Akbarpur, Moulivi Bazar,

J. A. RASHID
Research and Development Officer
MATEX, Foundation, Gazipur,

S. ISLAM
M.S Student
Dept. of Agronomy, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh.

Abstract/ Executive Summary:

The results of the study carried out during 2009-2010 with lablab bean (Lablab purpureus) are presented in this paper. Data were recorded from all experimental plants on the following characters as number of pods/plant, pod yield/plant (g), number of seeds/pod, number of seeds/plant; seed yield/plant (g), Range, mean, genetic parameter, correlation co-efficient and path coefficient were studied. High heritability coupled with high expected genetic advance in percentage of mean were observed for most of the characters. The coefficients of correlation showed that seed yield/plant was positively and significantly correlated with days to first flowering, days to 50% flowering, days to first pod setting, number of pods/plant, pod yield/plant and seeds/pod, number of seeds/plant, and seed yield. Path coefficient analysis showed that days to first flowering, days to 50% flowering, number of pods/plant, 20 pod weight (g), pod yield/plant, pod length, number of seeds/pod, number of seeds/plant, 100-seed weight influenced seed yield/plant directly in positive direction. Among the characters, number of seeds/plant had high positive correlation with seed yield/plant. Days to first pod setting exhibited negative direct effects on seed yield. From this result, it can be concluded that days to first flowering, days to 50% flowering, number of pods/plant, pod yield/plant, number of seeds/pod, number of seeds/plant, 100-seed weight are the most important yield contributing characters as they influenced pod yield and seed yield directly in positive direction.

Keywords: Lablab been, Genetic parameters, Correlation coefficient, Path coefficient.

Location: Genetics and Plant Breeding Experimental Farm, Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-08-2009

End Date: 00-04-2010

Program Area: Variety and Species

Commodity: Lablab bean

Objectives:

To find out the important genetic parameters relevant to pod yield and useful traits and examine interrelationship among characters contributing to pod and seed yield.

Methodology:

The experimental plot was located at the Genetics and Plant Breeding Experimental Farm, Bangladesh Agricultural University (BAU), Mymensingh, and the period was from August 2009 to April 2010. Sixty-six climbing genotypes were used in the experiment. The seeds were collected from the Lablab Bean Research Programme of Genetics and Plant Breeding Department, BAU. The materials included a number of advanced lines along with parental genotypes and land races. The experimental plots were prepared by digging pits about one week before sowing. Pits were spaced 2.0 m both between rows and within rows. Each pit was fertilized with 10.0 g Urea, 30.0 g TSP (Triple Super Phosphate), and 20.0 g MP (Muriate of Potash). Fertilizers were well mixed with the soil of the pits. The design was RCB with three replications. The seeds were sown on 14 August 2009. In each pit, 3 to 4 seeds were sown, but only one plant retained after germination. The young growing plant was supported by a single bamboo stake in each pit. Weeding was done at 25 and 50 days after sowing. Harvesting of green edible pods was started in the 2nd week of January 2010 and continued up to middle of April 2010. Data were recorded from all experimental plants on days to first flowering, days to 50% flowering, days to first pod setting, number of pods/plant, 20-pod weight (g), pod yield/plant (g), pod length (cm), number of seeds/pod, number of seeds/plant, 100-seed weight (g), seed yield/plant (g), range, mean, genetic parameter, correlation coefficient, and path coefficient analysis.

Source of Information: Bangladesh J. Agril. Res. 38(4): 705-717, December 2013 ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From this result, it can be concluded that days to first flowering, days to 50% flowering, number of pods/plant, pod yield/plant, number of seeds/pod, number of seeds/plant, 100-seed weight are the most important yield contributing characters as they influenced pod yield and seed yield directly in positive direction.

Knowledge Management: Journal