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Combining Ability for Yield and Yield Components of Maize (zea Mays L) in Diallel Cross

A. Ahmed
RARS,BARI, Jamalpur, Bangladesh

S. H. Khan
IPSA, Salna, Gazipur, Bangladesh

M. Nasiruddin
BRRI, Gazipur, Bangladesh

D. K. Parh
RARS,BARI, Jamalpur, Bangladesh

M.A. Khaleque
RARS,BARI, Jamalpur, Bangladesh

Abstract/ Executive Summary:

Combining ability analysis was made using a 6x6 half diallel cross of six open-pollinated varieties of maize. Additive components of variation (high GCA) was of greater importance than non-additive components (high SCA) in controlling all characters except ear length where, the reverse was found. Among the varieties studied, Obregon 7748 showed desirable GCA effects Ior ear length, kernel row number per ear, kernel number per ear and grain yield per plant and Poza Rica 7737 (E) for ear weight, I000-kernel weight and grain yield per plant indicating predominant role of additive genetic components in controlling these characters.

Keywords: Maize, Characters, Hybridization, Diallel cross

Location: Bangladesh Agricultural Research Institute's, Jamalpur

Start Date: 00-00-1985

End Date: 00-00-1986

Program Area: Variety and Species

Commodity: Maize

Objectives:

To understand the inheritance of characters, selection of suitable parents for hybridization and to isolate the promising F₁ hybrids for further exploitation in breeding program from a 6 x 6 diallel cross.

Methodology:

The investigation was conducted at Bangladesh Agricultural Research Institute's Regional Research Station, Jamalpur during the winter season of 1985-86. Six open-pollinated maize varieties were used. The materials comprising of 21 entries including a half set of diallel i.e. IS F₁'s and 6 parents were sown in a RCB design with four replications. Each entry was placed in a 5m long 4 rows plot with row and plant spacing of 0.75 and 0.75 and 0.25m, respectively. Observations were recorded from 10 competitive plants in each plot for ear length and weight, kernel row number, kernel number per ear, 1000-kernel weight and grain yield per plant.

Source of Information: Bangladesh J. Agri. 1993,18: 19-23

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The variety obregon 7748 showed a desirable GCA effects for ear length, kernel row number per ear, kernel number per ear and grain yield per plant, Poza Rica 7737 (E) for ear weight, I000-kernel weight and grain yield per plant and J-I for kernel row number per ear could be utilized to develop advanced generations, synthetics or composites, in order to exploit their additive and additive x additive type of interactions. Since additive components are predominant in these varieties mass selection procedure that utilizes additive genetic variance may be quite fruitful.

Knowledge Management: Journal