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Variability and Diversity Estimates of Yield and Yield Contributing Characters in Lentil (lens Culinaris Medic.)

Abul Kalam Azad
Department of Botany, University of Rajshahi, Rajshahi 6205, Bangladesh

Anil Chandra Deb
Departments of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi- 6205, Bangladesh

M. A. Khaleque
Department of Botany, University of Rajshahi, Rajshahi 6205, Bangladesh

Abstract/ Executive Summary:

Investigation on variability and diversity estimates of eight yield and yield contributing characters viz., plant height at first flower (PHFF), number of branches per plant at maximum flower (NBPMF), plant area per plant (PAPP), number of pods per plant (NPdPP), pod weight per plant (PdWPP), number of seeds per plant (NSPP), seed weight per plant (SWPP) and plant weight per plant (PWPP) were carried out in six irradiated lentil lines in 2005-2006 and 2006-2007. Presence of wide range of variation of all the characters indicated that they are quantitative in nature and are under polygenic control. The lines were genetically well differentiated as indicated by the analysis of variance. Significant differences among the doses for most of the characters showed that the four irradiation doses included in the analysis were different from each other. Significant year and dose and respective interaction items with lines for most of the characters indicated that the environments were different and they interacted with genotypes differently. Lines, years and doses interacted among themselves as indicated by significant L×D×Y. Heritability and genetic advance were estimated to be low for all the characters under study. However, the different components of variation and coefficient of variabilities, as calculated were more or less high for PAPP, NSPP, NPdPP, NBPMF and PHFF which indicated a wide scope of improvement of these traits through selection.

Keywords: Lentil, Variability, Diversity, Yield

Location: Regional Agricultural Research Station, Ishurdi, Pabna

Start Date: 00-00-2005

End Date: 00-00-2007

Program Area: Variety and Species

Commodity: Lentil

Objectives:

To study the variability and diversity of yield and yield contributing characters in 16 lentil lines.

Methodology:

In the present investigation twelve lentil lines (Lens culinaris Medic.) viz. line No. ILL 1, ILL 2, ILL 3, ILL 4, ILL 5, ILL 6, ILL 7, ILL 8, ILL 9, ILL 10, ILL 11 and ILL 12 were collected from International Center for Agricultural Research in the Dry Areas (ICARDA), Syria and other four of lentil lines viz. line No. Bm1, Bm2, Bm3, Bm4 collected from Regional Agricultural Research Station (RARS), Ishurdi, Pabna, Bangladesh. Above lines were irradiated with Co⁶⁰ source considering different doses i.e., no irradiation (D1), 20kr (D2), 25kr (D3) and 30kr (D4) in the institute of Food and Radiation Biology, Atomic Energy Research Establishment, Savar, Dhaka. The experiment was done in the research field of the Department of Botany, University of Rajshahi during the Rabi crop season of 2005-2006 and 2006-2007. Layout of the experimental field and trial of the irradiated lines was conducted under randomized complete block design with two replications having sixty four plots in each. The plot size was about 120cm × 150cm with five rows and in each row seven hills was maintained. In each hill, one plant was maintained. Screening of the mutant lines was maintained on the basis of survibability and maturity for flowering. For this study the data of eight agronomical characters were collected on individual plant basis. The measurement of a character was done following C.G.S system. The collected data were analysed following the biometrical techniques. The analysis of variance of a mixed model was used, where line (L) and dose (D) were fixed and year (Y) effect is random.

Source of Information: Journal of Biodiversity and Environmental Sciences, Vol. 1, No. 1, p. 35-50, 2011, ISSN: 2220-6663

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The characters included are quantitative in nature and the genetic variability existed with the lentil lines under study. Therefore, the genetic progress may be achieved with the effective selection of these characters, since the character PAPP showed the highest values for σ² , σ² , PCV, GCV followed by NSPP, NPdPP, NBPMF and PHFF. Provided environmental factors are to be controlled as for as possible as low heritability was observed in these materials.

Knowledge Management: Journal