Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Combining Ability and Gene Action in Cucumber (cucumis Sativus L.)

M. Nazim Uddin
Scientific Officer
Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

M. M. Hossain
Professor
Department of Horticulture, Bangabandhu Sheikh Mujibar Rahman Agricultural University (BSMRAU) Salna, Gazipur.

M. M. Rahman
Principal Scientific Officer
Department of Horticulture, Bangabandhu Sheikh Mujibar Rahman Agricultural University (BSMRAU) Salna, Gazipur.

S. Ahmad
Principal Scientific Officer
Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

A. K. M. Quamruzzaman
Senior Scientific Officer
Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

A study was carried out to assess the combining ability effect of different characters in a line x tester method comprising 24 hybrids produced by crossing eight lines with three testers in August 2006 - June 2007. Significant differences were observed among the parents and hybrids/crosses for general combining ability (GCA) and specific combining ability (SCA) respectively. Estimates of GCA effects demonstrated M₁ parent as good combiner for indeterminate type vine and F₈F₅ for determine vine. The parent F₈was the best for early male and female flower opening. The tester parents M₁ was found good combiner for longer vine, more number of fruits, long fruit and higher yield per plant. The parents F₁ was found good for average fruit weight. F₇was the best and F₁_,F₈were also the good general combiners as well to be used in crossing to improve the individual fruit bearing capacity. Hence, F₁_,M₁_,F₈and F₇were recognized as the good general combiners to improve fruit yield per plant. F₈X M₂was the best specific combiner to increase the fruit yield per plant. The magnitude of σ²SCA was high in all characters compared to σ²GCA and dominance variance (σ² D) was higher than the additive genetic variance (σ² A) indicating the performance of non additive gene action. The ratios of SCA and GCA variance were higher than unity indicating predominated non additive gene action over additive gene action for all characters.

Keywords: Combining ability, GCA, SCA, Additive, Gene action

Location: Olericulture Division of Horticulture Research Center, Bangladesh Agricultural Research Institute

Start Date: 01-08-2006

End Date: 30-06-2007

Program Area: Variety and Species

Commodity: Cucumber

Objectives:

1. To know the general and specific combining ability of parents and crosses for yield and its components;

2. To determine the mode of gene action in governing the characters;

3. To evaluate the hybrid performance.

Methodology:

The study was conducted at Olericulture Division of Horticulture Research Center, Bangladesh Agricultural Research Institute (BARI) during August 2006 to June 2007. Eleven diverse parents viz., CS 0008 (F₁), CS 0020 (F₂), CS 0063 (F₃), CS 0066 (F₄), CS 0071 (F₅), CS 0082 (F₆), CS 0093 (F₇), CS 0102 (F₈), CS 0047 (M₁), CS 0058 (M₂), CS 0090 (M₃) were used where F series denote female (line) and M series for male parents (tester). The nine parents were long (Elliptical to cylindrical) fruited locally called ‘shosa’ and the rest two were oval shaped called ‘khira’. The parents were cross compatible and crosses were made in a line x tester approach during October to January 2006 by hand pollination. In next summer 2007 entire 24 cross combinations and 11 parents were sown in a Randomized Complete Block Design (RCB) with three replications. All treatments were grown in 6.5 m long single row plot with 1.3 m plant to plant distance and 5 plants in each replication. A good drainage system was maintained by a 60 cm drain in between beds. All cultural operations and plant protection measures were carried out as per standard practices. Data were recorded on different characters viz., vine length (VL), days to 50% male flower (DFMF), days to 50% male flower (DFMF), number of fruits/plant (NFPP), single fruit weight (SFW), fruit length (FL), fruit width (FW), yield per plant (YPP). All quantitative data were used for combining ability analysis according to Kempthorne (1957) and determine the performance of parents and relative contribution to the F₁s as determined by general and specific combining abilities. GCA represents additive variance whereas SCA represents non additive effects. Calculations were done using MS-EXCEL.

Source of Information: SAARC JOURNAL OF AGRICULTURE, Vol. 7, Issue 1, 2009, pp. 63-71, ISSN 1682-8348, SAARC Agricultural Information Centre.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Significant differences were observed among the parents and hybrids/crosses for general combining ability (GCA) and specific combining ability (SCA) respectively. Estimates of GCA effects demonstrated M₁ parent as good combiner for indeterminate type vine and F₈F₅ for determine vine. The parent F₈was the best for early male and female flower opening. The tester parents M₁ was found good combiner for longer vine, more number of fruits, long fruit and higher yield per plant. The parents F₁ was found good for average fruit weight. F₇was the best and F₁_,F₈were also the good general combiners as well to be used in crossing to improve the individual fruit bearing capacity. Hence, F₁_,M₁_,F₈and F₇were recognized as the good general combiners to improve fruit yield per plant. F₈X M₂was the best specific combiner to increase the fruit yield per plant. The magnitude of σ² SCA was high in all characters compared to σ² GCA and dominance variance (σ² D) was higher than the additive genetic variance (σ² A) indicating the performance of non additive gene action. The ratios of SCA and GCA variance were higher than unity indicating predominated non additive gene action over additive gene action for all characters.

Knowledge Management: Journal