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 Analysis and Character Association in Jamir (citrus Jambhiri) Accessions of Bangladesh by Using Morphological Traits

S. Akhter
Department of Horticulture, Bangladesh Agricultural University Mymensingh-2202, Bangladesh

M. J. Ferdous
Department of Horticulture, Bangladesh Agricultural University Mymensingh-2202, Bangladesh

M. R. Hossain1
Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

G. Rabbani
Department of Horticulture, Bangladesh Agricultural University Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was carried out to study the morphological variability, characters association, correlation and path coefficient analysis of 14 Jamir accessions during the period from January 2007 to March 2008. Significant variations were observed for all the plant characters studied. The accession CJ09 was characterized with the maximum plant height (6.20m), spreading of branch (north-south 4.90 m and east-west 4.87m), base girth (58 cm), plant growth (102.76m3), tree volume (24.64m3) and segment length (9.70). The accession CJ15 showed maximum spine length (25.33mm), CJ05 was characterized with high lamina area (14.94cm3). The accession CJ12 showed the highest % fruit set (36.67%). The highest fruit weight (1753.33g), fruit diameter (46 cm), rind thickness (2.73cm) was observed in CJ11. The accession CJ09 was characterized with maximum number of segment (15.33) and pulp weight (746.67). Maximum TSS (12.20%) was found in CJ12. The accession CJ09 was characterized with minimum number of seeds (14). Correlation coefficient study indicated that fruit diameter, rind thickness, length of segment and number of segment had positive and highly significant phenotypic association with fruit weight and also genotypic positive association. Percent Fruit set had negative genotypic and phenotypic association with fruit weight. In respect of path analysis, fruit diameter, rind thickness, number of segment, length of segment contributed to maximum phenotypic and genotypic direct effects on fruit weight indicating their importance as selection parameters.

Keywords: Jamir, Character association, Morphology, Correlation, Path analysis

Location: The Jamir orchard, CVFB project, Department of Horticulture, Bangladesh Agricultural University, Mymensingh

Start Date: 00-00-2007

End Date: 00-00-2008

Program Area: Variety and Species

Commodity: Fruit

Objectives:

To assess the interrelationship between yield and yield contributing characters of 14 Jamir accessions and to study the direct and indirect effects of important characters on yield.

Methodology:

The experiment was conducted at the Jamir orchard (situated between 24°75" N latitude and 90°50" E longitude at the elevation of 18 m above the sea level) of CVFB (Collection, Molecular Characterization and Conservation of Landraces and Wild Relatives of Different Vegetables and Fruits of Bangladesh) project, Department of Horticulture, Bangladesh Agricultural University, Mymensingh during the period of March 2007 - June 2008. The experiment was laid out in completely randomized block design with three replications. Each of 14 accessions represented one treatment and one plant in an accession represented one replication. The experimental area was under sub-tropical climatic zone and characterized by high temperature and heavy rainfall during April to September and scanty rainfall associated with moderately low temperature during the rest of the year. The soil of the experimental site was silty loam in texture belonging to the Old Brahmaputra Flood Plain. The selected plot was well drained and medium high land having pH value 8.5. Data were recorded on different plant, leaf, flower, fruit and seed characteristics. Plant growth was determined by a formula : H × N-S spread × E-W spread × 0.7 a constant factor for citrus fruits, where H represents height, N-S represents north-south spread, and E-W represents east-west spread and tree volume was measured by formula 1/6 × H × (2r)2 Where, H = Height, 2r = (East-West spread + North-South spread)/2. Base girth one meter above the ground level was measured using a measuring tape. Ten leaves were selected randomly from each of three plants of each accession to study leaf shape and leaf apex. Leaf area was measured by leaf area meter (CI-202 area meter, CID, Inc, USA). The TSS was determined by hand refractometer (ATAGO NI Brix 0-32%, Japan). External appearance, external colour and pulp colour of fruits of different accessions were recorded visually using a colour chart. The significance of difference between treatment means was evaluated by least significance difference (LSD) test.The analysis of variances was performed by F variance test using the software program ‘MSTAT’. Genotypic variance (GV) & phenotypic variance (PV) was calculated using the formula, GV = MS-EMS/r and PV = GV + EMS where, MS is mean square, EMS is error mean square and r is replication. Genotypic co-efficient of variation (GCV) & phenotypic co-efficient of variation (PCV) was calculated by the equation, GCV = (GSD/mean) × 100 and PCV = (PSD/mean) × 100, respectively where, GSD & PSD are the genotypic & phenotypic standard deviation, respectively. Spearman’s rank correlation coefficients were calculated using the ‘PLABSTAT’ software version 2N (Utzal, 2007) by using the formula of simple correlation coefficient, r_xy = SP(xy)/ SS(x) .SS(y) , where, SP(xy) is sum of products of X & Y and SS (x) & SS (y) are sum of squares of X and Y, respectively. Direct and indirect path coefficients were calculated by using the method as described by Lynch and Walsh (1998) using the software program ‘BASICA’.

Source of Information: Progress. Agric. 20(1 & 2) : 17 – 26, 2009 ISSN 1017-8139

Article Link (Online Journal): http://www.banglajol.info/index.php/PA/article/view/16843/11823

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Higher variation was observed for different characters among the genotypes that offered better scope of selecting distant parents for future breeding programs. Selection of superior genotypes from the collected germplasm will be helpful to increase production through selective breeding program which in turn could improve livelihood of farmer and overall socio-economic condition of the country.

Knowledge Management: Journal