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 Analysis for Different Yield Components in Maize (zea Mays L.) Inbred Lines

F. M. A. Haydar
Department of Botany, University of Rajshahi, Rajshahi, Bangladesh

N. K. Paul
Department of Botany, University of Rajshahi, Rajshahi, Bangladesh

Abstract/ Executive Summary:

The present study was carried out to determine the combining ability of yield and yield components by crossing six diverse maize inbred lines in a half diallel mating design. Fifteen F₁ progenies along with their six parents were planted in randomized complete block design with three replications. GCA to SCA ratios were less than one for plant height, cob diameter, cob length and number of kernels row/cob indicating a preponderance of additive over non additive gene action. The crosses P1×P2, P3×P5 and P5×P6 were exhibited significant and positive SCA effects for yield and cob diameter, number of row/cob and number of grains/cob of yield contributing characters. The parents P1 (IL4), P3 (IL18) and P5 (IL23 were good general combiner for grain yield and yield attributing characters. It can be concluded that these parental lines can be desirable parents for hybrids as well as for inclusion in breeding program, since they may contribute favorable alleles in the synthesis of new varieties.

Keywords: Crossing; Combiner; Alleles; Maize; Diallel

Location: Experimental field, Department of Botany, University of Rajshahi, Bangladesh

Start Date: 26-11-2013

End Date: 28-11-2014

Program Area: Variety and Species

Commodity: Maize

Objectives:

The objectives of the present study were to evaluate GCA and SCA effects of six maize inbred lines and their F₁’s in order to determine superior breeding lines and cross combinations.

Methodology:

The genetic materials used in this experiment were six parents (IL4=P1, IL5=P2, IL18=P3, IL10=P4, IL23=P5 and IL1=P6) and their F₁ which were P1×P2, P1×P3, P1×P4, P1×P5, P1×P6, P2×P3, P2×P4, P2×P5, P2×P6, P3×P4, P3×P5, P3×P6, P4×P5, P4×P6 and P5×P6. The present investigation was carried out during 26 November 2013 and 28 November 2014 seasons at the experimental field, Department of Botany, University of Rajshahi, Bangladesh. Plants at flowering stage (just before anthesis) were selected and crossed in half diallel fashion from 26 November, 2013 to January, 2014 excluding reciprocals and to obtain the F₁ seeds. The F₁ seeds of all the crosses with their parents were planted in the field on 28 November, 2014 season for evaluation in a randomized block design with three replications. The experimental unit was a single row of 3.0 m long. Inter-plant and inter-row distances were 10 and 30 cm, respectively. Fertilizers were applied at the rate of 250, 125, 120, 45 and 5 kg/ha of N, P₂O₂, S and Zn, respectively. Necessary intercultural operations and irrigation were done during the crop period to ensure normal growth and development of the plants. Five plants from each row were randomly selected for recording data on the studied characters such as days to tasseling, days to silking, days to maturity, plant height(cm), ear height(cm), cob length(cm), cob diameter (cm), number of rows/cob, number of kernels/row, number of kernels/cob and grain yield/plant(g). The combining ability analyses were carried out using Griffing's (1956) Method 2 Model II given in “Statistical and Biometrical Techniques in Plant Breeding by Sharma (1998) using CropStat (2007).The mean squares for GCA and SCA were tested against their respective error variances derived from ANOVA reduced to mean level.

Source of Information: Bangladesh J. Pl. Breed. Genet., 27(1): 17-23, 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Parents with good positive GCA for yield (P1 and P4), negative GCA for days to silking and maturity (P1 and P3), dwarf plant and ear height (P5) may be extensively used in hybridization program as a donor. Better performance of P1×P2, P1×P5, P3×P5 and P3×P6 can be utilized for developing high yielding hybrid varieties as well as exploiting hybrid vigor. These crosses may be multiplicities for distribution of seeds among the farmers.

Knowledge Management: Journal