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Variability and Diversity Studies in Durum Wheat (triticum Durum)

M. A. Alam*
Scientific officer
Regional Agricultural Research Station, BARI, Ishurdi, Pabna, Bangladesh

A. A. Khan
Scientific officer
Regional Agricultural Research Station, BARI, Ishurdi, Pabna, Bangladesh

M. K. Alam
Scientific officer
Regional Agricultural Research Station, BARI, Ishurdi, Pabna, Bangladesh

Z. I. Sarker
Principal Scientific Officer
Wheat Research Centre, BARI, Nashipur, Dinajpur Bangladesh

M. M. Rahman
Scientific Officer
Regional Wheat Research Centre, BARI, Rajshahi Bangladesh

Abstract/ Executive Summary:

The present investigation was carried out to study genetic variability and diversity in 13 advanced durum wheat genotypes along with the two local checks namely WRF-7 and Prodip. Statistical analysis revealed significant differences for all the characters studied, indicating presence of considerable amount of variations among genotypes for each character. The high genotypic and phenotypic coefficient of variation were obtained for grains/spike and spikes/m2. Moderate to high heritability with moderate genetic advances in percent of means were estimated against plant height, spikes/m2 and 1000-grain weight and these characters could be efficiently exploited through selection. Fifteen genotypes were grouped into five clusters based on D2 -statistics. Genotypes in cluster III showed maximum intra-cluster distance (0.3193) and the clusters IV and V exhibited the highest genetic distance (24.774). Therefore, parental selection from these two clusters would be effective for improvement. Maturity days was the greatest contributor to genetic divergence. Genotypes in cluster IV showed maximum diversity and can be used as parents in hybridization programs to develop high-yielding varieties. The genotypes in cluster IV may be included in crossing programme for the improvement of yield potential in durum wheat.

Keywords: D2 -statistics, Diversity, Durum wheat, PCA, variability

Location: Regional Agricultural Research Station of Bangladesh Agricultural Research Institute, Ishurdi, Pabna

Start Date: 00-00-2008

End Date: 00-00-2009

Program Area: Conservation and Biodiversity

Commodity: Durum wheat

Objectives:

The genetic diversity of plants determines their potential for improved efficiency and hence their use for breeding, which eventually may result in enhanced food production (Khodadadi et al. 2011). The objective of the investigation was to study genetic variability and diversity among durum wheat genotypes and also to assess their potential as parents for improvement.

Methodology:

The study was carried out with 15 genotypes in Randomized Complete Block Design with three replications at the Regional Agricultural Research Station of Bangladesh Agricultural Research Institute, Ishurdi, Pabna, during the winter season of 2008-09. The unit plot size was 5×1.2 m following 20 cm row spacing. Standard package of practices were followed for raising the crop. The studied characters were head days, maturity days, plant height (cm), spikes m -2, grains spike-1, 1000-grain weight (g) and grain yield (kg ha-1).

The analyses of variances for different characters were measured according to Steel and Torrie (1960). The mean squares were used to estimate genotypic and phenotypic variances according to Johnson et al. (1955). The genotypic and phenotypic coefficient of variations and heritability values were calculated as suggested by Singh and Chaudhary (1985). Mahalanobis’s D2 -statistics were used for estimating genetic divergence among the genotypes. The genotypes were grouped into clusters following Tocher’s method given by Rao (1952).

Source of Information: Journal of Science and Technology 11(June 2013): 1-5

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Keeping this in view, the findings from the present study indicated that the cluster II and V, III and V; IV and V showed higher distance between them. Parental material selection from these clusters would give high manifestation of heterosis as well as wide spectrum of variation in segregating generations.

Knowledge Management: Journal