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Studies on the Combining Ability and Heterosis in Tomato. Season: 2017-2018

M. A. Goffar
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

M.A. Asgar
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

G.M.A. Halim
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

P. Hanson
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

Abstract/ Executive Summary:

A study on combining ability and heterosis of nine parents and their 45 crosses were conducted at the experimented field of Olericulture Division of HRC, BARI during the winter season of 2017-18. The GCA and SCA effects of parents and their crosses and percent heterosis over better and mid-parent were recorded. Considering breeding and horticultural traits, 15 hybrids were selected covering three categories (5 combinations of each considered as determinate, semi-determinate and summer type) for performance study in the following year.

Keywords: Vegetables, Tomato, Hybrid tomato, Hydroponic technology

Location: Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Crop-Soil-Water Management

Commodity: Tomato

Objectives:

To evaluate the performance of Tomato of the selected hybrids.

Methodology:

The experiment was carried out in the experimental field of the Olericulture Division of HRC, BARI during the winter season of 2017-18. Nine parents along with their 45 crosses (diallel crosses was done during the winter season of 2016-17) were seeded in the seedbed on October 19, 2017. Thirty days old seedlings were transplanted in the main plot on November 18, 2017. The experiment was laid out in RCB design with three replications having plot size of 4.8x1 sq m providing a spacing of 60x40 cm. Data on days to 50% flowering, plant height at last harvest, days to maturity, TSS, fruit length and diameter, number of fruit /plant, individual fruit weight, yield /plant, yield /ha and number of seeds/fruit shelf life and virus infection were recorded. The collected data on the aforementioned parameters were statistically analyzed by Crop stat software, and general and specific combining ability (GCA and SCA) effects were estimated following the method II approach suggested by Griffing (1965).

Source of Information: Annual Research Report 2017-2018, Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering GCA and SCA effects of parents and their crosses and percent heterosis over better and mid parent on different parameters, yield and other horticultural traits, there were 15 combinations selected in three categories viz.: i. Determinate type (P₁ x P_2,P₁x P_5,P₁x P₆and P₆x P₇); ii. Semi-determinate type (P₃ x P_8,P₄x P_8,P₅x P_8,P₆x P₈and P₇x P₈); and iii. Summer type (P₂x P_9,P₃x P₉, P₄x P₉, P₆x P₉and P₇x P₉). Based on categories, the selected lines may be put into performance trials for the following season.

Knowledge Management: Report/Proceedings