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S. AKTER
Dept. of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

B. K. BISWAS
Dept. of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

A. K. AZAD
Dept. of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

M. HASANUZZAMAN
Dept. of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

M. ARIFUZZAMAN
Dept. of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh

A field experiment was conducted with 30 fine rice genotypes for correlation and discriminant function analysis of some selected characters. A remarkable variation in plant characters and yield performance was noticed among the fine rice. Genotypic correlation coefficients indicated a fairly strong inherent relationship among the characters. A total of the 31 selection indices along with genetic worths and relative efficiencies over straight selection were estimated the five single character selection indices, grain yield offered maximum genetic worth (12.05). The two character combination function a substantial gain of 171.45% was observed when effective tillers/hill was selected together with 1000-grain weight. It is obvious that the index, I245 accounted a profitable efficiency (217.18%) as compared to other three character functions studied and the four character index, I1245 appeared to be highly beneficial over straight selection. However, the tedious approach, I12345 might be adopted while attention of a breeder is solely engaged for increasing grain yield in fine rice.

  Fine rice, Variation, Selection index
  The experimental field of Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur
  26-06-2008
  00-12-2008
  Socio-economic and Policy
  Performance

To study the correlation and discriminant function in fine rice. 

The experiment was conducted at the experimental field of the Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur during the period from June, 2008 to December, 2008 to study the correlation and discriminant function in fine rice. The experiment was conducted with 30 accessions of fine rice namely Zirashail, Lal Paijam, Kalosuru, Badshabhog, Paijam, Shilkamal, Binnipakri, Shadakatari, Shitabhong, Zetha katari, Malshira, Katari, BRRI dhan34, Najirshail, Sanla, Ranjid, Chiconsarna, Zira, Boldar, Lalfota, Darkashail, Dudshar, Begunbichi, Sumonsarna, Moulata, Lalchicon, Chinigura, Rajshahisharna, Uknimodhu and Motamota. From these genotypes, first thirteen were collected from Dinajpur district, one variety from BRRI (Bangladesh Rice Research Institute) and another sixteen from different regions of Bangladesh. The experimental plot was laid out in Randomized Complete Block Design with three replications. Each replication contained plants of 30 genotypes having 20 cm × 15 cm spacing and individual plot size was 2 m × 1.5 m. The land was ploughed by tractor and country plough followed by laddering to get a good puddled condition. Weeds and stubbles were removed from the field prior to sowing/transplanting of seedlings. The same procedure of land preparation was followed in case of transplanting. Manures and fertilizers were applied following the recommended dose of SRDI  manual and irrigation channels were made around the each block. Seeds were sown on 26 June, 2008 in the experimental seed beds. The healthy seedlings of 25 days old were transplanted in separate strip of the experimental field on 20 July, 2008. In each strip 15 cm × 20 cm spacing between plant to plant and row to row, respectively were maintained. All of the fertilizers except urea were applied as basal dose at the time of final land preparation. Urea (150 kg ha-1) was applied in equal three splits. The first dose of urea was applied at 21 days after transplanting (DAT). The second dose of urea was added as top dressing at 45 days (active vegetative stage) after transplanting and third dose was applied at 60 days (panicle initiation stage) after transplanting recommended by BRRI. The collected data were compiled and tabulated in proper form for statistical analysis. Analysis of variance was done following Randomized Complete Block Design (RCBD) with the help of a computer package (MSTAT) and the mean differences among the varieties were adjudged by Duncan's Multiple Range Test. The genotypic and phenotypic correlation coefficients between yield and its different contributing characters were estimated with the formula. Application of discriminant function as a basis for making selection on several characters simultaneously and aimed at discriminating the desirable genotypes from undesirable ones on the basis of their phenotypic performance.

  Int. J. Sustain. Crop Prod. 5(4):30-35, (2010)
  
Funding Source:
1.  Government Budget:  
  

Results of the present studies indicated significant variation among the genotypes for all the characters studied and selection would be effective for the characters viz. panicle length, spikelets/panicle, effective tillers/hill and 1000-grain weight to increase the grain yield/hectare as reflected by strong and positive correlation.

  Journal
  


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