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Diallel Analysis of Quality and Yield Contributing Traits of Pumpkin (cucurbita Moschata Duch. Ex Poir.)

M. S. Rana
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur- 1706, Bangladesh

M. G. Rasul
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur- 1706, Bangladesh

A. K. M. A. Islam
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur- 1706, Bangladesh

M. M. Hossain
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur- 1706, Bangladesh

Abstract/ Executive Summary:

A 5 X 5 diallel analysis was carried out according to Hayman on quality and yield contributing traits of pumpkin. Five (5) advanced inbreds of pumpkin viz IB 23, IB 40, IB 47, IB 50 and IB 57 were used in this study. The five parents and their F₁ hybrids were arranged in a randomized complete block design with three replications for studying the quality and yield contributing traits. Analysis of variance showed significant differences among genotypes for all of the traits except dry matter and fruit yield. Parental mean suggested that all the parents contained recessive alleles with positive effect. In the 5 × 5 diallel set, Wr-Vr graph analysis revealed the presence of allelic interaction in all the character’s except fruit length, dry matter, brix percentage and reducing sugar where non-allelic interaction was present.

Keywords: Diallel, Allelic interaction, Non-allelic interaction, Pumpkin

Location: Genetics and Plant Breeding Department, BSMRAU, Salna, Gazipur-1706

Start Date: 00-11-2012

End Date: 00-03-2013

Program Area: Variety and Species

Commodity: Pumpkin

Objectives:

To ascertain the nature of gene action involved in controlling considered yield and quality contributing traits of pumpkin.

Methodology:

The materials comprised of five advanced inbred lines viz., IB 23, IB 40, IB 47, IB 50 and IB 57 (designated as P₁, P₂, P₃, P₄ and P₅, respectively) developed by the Department Genetics and Plant Breeding, BSMRAU was used in the study for combining ability analysis in a 5x5 diallel population. The inbreds were synthesized in the previous year. The 25 entries (20 crosses and five parents) were grown in a randomized complete block design with three replications at the experimental plot of Genetics and Plant Breeding Department, BSMRAU, Salna, Gazipur-1706 during November, 2012 to March, 2013 for studying performance. Observations were recorded and measured on fruit length, fruit breadth, hollowness, flesh thickness, dry matter percentage, brix percentage, reducing sugar, non- reducing sugar, total sugar and fruit yield. The traits indicating significant differences among genotypes were further analyzed for genetic studies and the gene action was determined by using Hayman (1954, 1958) and Jinks (1954, 1955, 1956) methods.

Source of Information: The Agriculturists 14(1): 15-32 (2016)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Diallel analysis was done to find out promising parents for further use in a breeding program to develop a new variety with more nutritional quality and higher yield. In this experiment, no parent was found promising for more than three traits, even the parents were not containing any dominant alleles. So further advancement i.e. selfing of selected line is needed to ensure more frequency of dominant alleles as well as resulting in good combination for several quality and yield contributing character.

Knowledge Management: Journal