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Genetic Architecture of Yield in Eggplant (solanum Melongena)

A. K. M. Quamruzzaman
Scientific Officer
Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-170I, Bangladesh

M. Nazim Uddin
Scientific Officer
Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-170I, Bangladesh

M. Moshiur Rahman
Scientific Officer
Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-170I, Bangladesh

M. A. Salam
Scientific Officer
Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-170I, Bangladesh

M. K. Jamil
Scientific Officer
Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-170I, Bangladesh

Abstract/ Executive Summary:

The genetic architecture of yield in eggplant was studied in a nine parent half diallel cross. The values of mean square tor GCA (general combining ability) and SCA (specific combining ability) were highly significant which suggested the presence of both additive and non-additive genetic variance in the population. The higher magnitude of GCA, as compared with SCA, indicating predominance of additive genetic variance. In most of the cases, the cross between poor and poor parents showed positive SCA effect for yield per plant, which indicated the higher yield. The estimates of better parent heterosis ranged from 3 to 90 percent and the mid-parent heterosis ranged from 30 to 105 percent. Analysis for genetic components of variation suggested that additive components were more important in the inheritance of yield per plant. This character was observed being controlled by two to three pairs of genes or groups of genes. Narrow sense heritability was 21 percent indicating probability of selection in generations. The graphical analysis also indicated wide genetic diversity among the parents.

Keywords: Eggplant, Combining ability, Heterosis, Genetic architecture

Location: Gazipur

Start Date: 00-00-2002

End Date: 00-00-2003

Program Area: Variety and Species

Commodity: Brinjal

Objectives:

1.To investigate the genetic architecture of yield in eggplant.

2.To understanding the nature and magnitude of gene interaction in the development of effective breeding programme.

Methodology:

The eggplant breeding studies were carried out at the experimental fields of Olericulture Division of Horticulture Research Centre, Bangladesh Agricultural Research Institute (HRC, BARI) at Gazipu, during the winter season of 2002-2003. Seeds of the nine parents used in the study were: P₁ = BL08I (the fruit size slightly longer than broad and the colour green mottle), P₂ = BL083 (the fruit size several times as long as broad and the colour deep purple), P₃ = BL 009 (the fruit size several times as long as broad and the colour purple), P₄ = Kazla (the fruit size three times as long as broad and the colour deep purple), P₅ = BL 113 (the fruit size three times as long as broad and the colour purple-motile), P₆ = BL099 (the fruit size several times as long as broad and the colour purple green), P₇ = Uttara (the fruit size three times as long as broad and the colour light purple), P₈ = BL 114 (the fruit size slightly longer than broad and the colour deep purple) and P₉ = Islampuri (the fruit size as long as broad and the colour deep purple). The parents and their thirty-six hybrids (excluding reciprocals), were sown on the seedbeds on 16^th September 2002. Seedlings (45-day old), were transplanted in the main field on 30th October.2002. The experiment was laid out in a RCB design with three replications. The unit plot size was 7.5 x 0.70 m and 10 plants per entry were transplanted in a clot. with the plant spacing of75 cm in a single row, maintaining a row to row distance of 70 cm, Data on yield per plant were recorded from five randomly selected plants from each parental and hybrid lines per replication. The data were statistically analysed following the procedures of Jinks (1971), Griffing (1956) and Hayman (1954).

Source of Information: Pakistan J. Ind. Res. 49(2): 134-139; (2006)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the present study, the parents, P₄, P₁ and P₅ were found to be good general combiners for yield per plant and may be used in breeding programmes for the development of high yielding varieties. The crosses, P₄ x P₅, P₂ x P₈, P₄ x P₈, and P₂ x P₈ were found to be promising for high yielding. The additive components of variation were important for the yield per plant. The genetic components of variation analysis suggested that the proportion of recessive alleles was more than that of dominant alleles in the parents. The yield was observed being controlled by two to three pairs of genes or groups of genes. The graphical analysis indicated wide genetic diversity among the parents.

Knowledge Management: Journal