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 Estimates in Maize (zea Mays L.) Through Line × Tester Analysis

S. Ahmed
Scientific Officer
Biotechnology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701

S. Begum
Scientific Officer,
Plant Breeding Division, BARI, Gazipur- 1701

M. A. Islam
Senior Scientific Officer
Plant Breeding Division, Regional Agricultural Research Station, BARI, Jamalpur-2000,

M. Ratna
Scientific Officer
Spices Research Sub-Centre, BARI, Faridpur-7800

M. R. Karim
Scientific Officer
Horticulture Research Centre, BARI, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

Eighteen advanced S4 lines of maize extracted from NK46 were evaluated through line × tester method by using two testers for grain yield and its components. General combining ability (GCA) and specific combining ability (SCA) effects of crosses were determined to evaluate the prospective inbred lines. Highly significant genotypic differences for all of six characters, i.e. days to 50% tasselling, Days to 50% silking, plant height, ear height, 1000 kernel weight, and yield indicated presence of wide range of variability among the genotypes for those traits. Non-additive gene action was predominant. Four lines for days to 50% tasselling, one for days to 50% silking, two for plant height, one for ear height, three for 1000 kernel weight, and four for yield were found with significant GCA effects in desired direction. For days to tasselling, days to silking, plant height and ear height, none of 36 cross combinations confirmed significant SCA effects. Five combinations showed significant positive SCA effects for 1000 kernel weight. For yield two crosses showed significant positive SCA. Considering the results of present study, based on GCA and SCA analysis of observed characters seven lines namely, NK46-2, NK46-4, NK46-10, NK46- 13, NK46-18, NK46-43 and NK46-44 were selected for further breeding program

Keywords: Zea mays L., Line × Tester, Combining ability

Location: Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Hathazari, Chittagong, Bangladesh

Start Date: 00-11-2013

End Date: 00-04-2014

Program Area: Variety and Species

Commodity: Maize

Objectives:

The present study involving a line × tester analysis was aimed to determine the general combining ability (GCA) and specific combining ability (SCA) of developed crosses for different traits and to explore the superior lines with earliness, low plant and ear height with higher yield for advancing to the next generation.

Methodology:

Eighteen lines of maize were selected from S4 lines which were developed from a source population of NK46 through recycling (repeated inbreeding) for four generations. Two inbred lines with diverse genetic base namely BIL28 (Jahan et al. 2014) and BIL79 were selected as testers. During rabi, 2012-13 the hybridization was performed following Line × Tester mating design using 18 S4 lines (listed in Table 1) as female and testers as male parents to obtain 36 cross combinations. The 36 cross combinations and 18 advanced lines and two testers were grown in an Alpha lattice design with two replications with spacing of 75 x 20 cm at Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Hathazari, Chittagong, Bangladesh during rabi, 2013-14. Seeds were sown in 29 November, 2013. One border row was used at each end of the replication to minimize the border effect. Fertilizers were applied @ 250, 120, 120, 40, 5 and 1 kg/ha of N, P₂O₅, K₂O, S, Zn and B respectively. One third urea and total amount of other fertilizers were applied at final land preparation. The remaining urea was applied in two installments as top dressing. Standard agronomic practices including two weeding and four irrigations and plant protection measures were followed to raise a healthy crop. The data were recorded on 10 randomly selected plants for quantitative characters viz. days to 50% tasselling, days to 50% silking, plant height (cm), ear height (cm), 1000 grain weight (g), and grain yield (g). Combining ability analysis was done as per the method given by Kempthrone (1957).

Source of Information: Bangladesh J. Agril. Res. 42(3): 425-436, September 2017 ISSN 0258-7122 (Print), 2408-8293 (Online)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Seven lines namely, NK46-4 for short plant and ear height and yield, NK46-10 and NK46-18 for earliness as well as yield, NK46-2, NK46-13, NK46-43 and NK46-44 for yield only were selected. These lines may be utilized for advancing to next generation.

Knowledge Management: Journal