Estimation of some genetic paramrters, correlation and path coefficient analysis for some traits in eggplant

Abstract EN

Full diallel crosses was conducted at the Vegetable Field, College of Agriculture, University of Dohuk to study some genetic parameters for eggplant varieties and their hybrids, correlation and path analysis for some trait in eggplant.

The results showed that additive variance (σ2A) was significant for all traits (plant height, no.

of branches, date of flowering, no.

of flowers/ inflorescence, average wt.

of fruit no.

of fruit/plant total yield/plant , fruit weight and diameter), whereas the dominant variance (σ2 D) and environmental variance (σ2 E) were not significant for all traits.

Heritability in broad sense was high for all studied traits except no.

of branches and early yield.

Narrow sense heritability was high for plant height, date of flowering , no.

of flowers inflorescence-1 , fruit weight , no.

of fruits plant-1 , fruit length and diameter, which reflect the importance of additive gene action for these traits and the average degree of dominance was less than one for all traits, indicating the presence of partial dominance.

Appositive phenotypic correlation was found between the total yiel/plant with no.

of branches, fruit length and no.

of fruits plant-1 .

Path coefficient analysis revealed that no.

of fruits plant-1 and fruit weight had high direct effects on the total yield while date of flowering had a positive indirect effect on the plant yield through fruit weight.

And no.

of branches plant-1 had high indirect effect through no.

of fruits.

It concluded that fruits number and fruit weight traits had highly direct and indirect effect from other traits for this we can depended on it for selection for highly yield in eggplant.