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

Genetic Divergence in Maize (zea Mays L.)

N. A. Ivy
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur RahmanAgricultural University, Salna, Gazipur, Bangladesh

M. Shalim Uddin
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur 1701

R. Sultana
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur 1701

M. M. Masud
Dhaka University, Dhaka, Bangladesh

Abstract/ Executive Summary:

Genetic divergence of 25 genotypes of maize were estimated using D2 and Principal Component Analysis. The genotypes under study fell into five clusters. The intercluster distances were higher than intra cluster distances suggesting wider genetic diversity among the genotypes of different groups. The intra-cluster value was maximum in cluster V and minimum in cluster I. The inter cluster D2 values showed the maximum distance between cluster II and III followed by the distance between II and I. The cluster means were higher for days to maturity, plant height and ear height in cluster II; grain yield per plant was higher in cluster IV. Genotypes were much in use having the above mentioned characters in clusters II and IV would offer a good scope for the improvement of this crop through hybridization and rational selection.

Keywords: Maize (Zea mays L.), Divergence, Cluster, Bangladesh

Location: Bangladesh Agricultural Research Institute, Gazipur-1701

Start Date: 00-11-2000

End Date:

Program Area: Variety and Species

Commodity: Maize

Objectives:

Therefore, the experiment was undertaken to find out suitable genotypes that could directly be used as a open pollinated variety or parents for hybrid or synthetic variety for this country.

Methodology:

Twenty-five genotypes of maize (Zea mays L.) collected from CIMMYT, Mexico were grown in a randomized block design with 3 replications at Bangladesh Agricultural Research Institute, Gazipur-1701 in the rabi season of 2000. The seeds were sown on November 2000. The unit plot size was 5m long and intra row spacing was 75 cm and 25cm with one plant in each hill. Fertilizers were applied at the rate of 250: 120 :120 : 40: 5 kg N, P₂O₅, K₂O, S and Zn, respectively. The intercultural operations were done timely to raise a good crop. Observations were recorded from 10 randomly selected plants in each plot for days to silking, days to maturity, plant height, ear height, husk cover and grain yield per plant. The data were subjected to Principal Component Analysis and Mahalanobis’s D2 analysis using Genstat 513 program. The genotypes were grouped into several clusters following the method discussed by Tocher (Rao, 1952).

Source of Information: Bangladesh J. Pl. Breed. Genet., 20(1) : 53-56, 2007

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Cluster II had maximum number of characters (3) having highest intra cluster means. Contributions for the characters towards divergence are presented in Table 4. The canonical analysis revealed that, values in both the vectors (Vector I and II) for Plant height (0.0.89 and 0.427), ear height (0.42 and 0.907) and grain yield/plant (0.00 and 0.344) were found positive. Such results indicate that these characters contributed maximum towards divergence of the genotypes. On the basis of the findings of the present study, it can be recommended that the genotypes from cluster III, IV and V can be selected for hybridization for high yield.

Knowledge Management: Journal