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 Variation and Selection Criteria for Seed Yield Related Traits in Rape Seed (brassica Napus L.)

S. Parveen
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.

M. H. Rashid and
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.

M. S. R. Bhuiyan
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.

Abstract/ Executive Summary:

The field experiment was conducted to estimate the genetic variability and correlation between yield contributing traits using 15 rape seed genotypes. The results indicated that the phenotypic variance for all the characters was considerably higher than the genotypic variance denoting little influence of environmental factors on their expression. Characters like 1000-seed weight (12.39, 14.10), days to 50% flowering (18.36, 18.77) and days to maturity (4.63, 5.06) showed low genotypic and phenotypic coefficient of variation. Moderate genotypic and phenotypic coefficient of variation was observed in number of primary branches per plant (20.22, 22.16), length of siliqua (20.84, 20.97), number of seeds per siliqua (30.90, 33.06), number of siliquae per plant (49.34, 49.81) and yield per plant (34.36, 39.98) and high genotypic (67.00) and phenotypic coefficient of variation (68.57) was observed for number of secondary branches per plant. Plant height (85.98%, 30.89), 1000 seed weight (77.14%, 22.41), days to 50% flowering (95.66%, 20.35) and days to maturity (83.85%, 7.82) showed high heritability with low genetic advance which indicated the possibility of non-additive gene action. Number of primary branches per plant (83.22%, 37.99, 636.02), length of siliqua (98.83%, 42.68, 1084.42), number of seeds per siliqua (87.40%, 59.52, 424.22), number of siliqua per plant (98.15%, 100.71, 178.83) and yield per plant (73.87%, 60.84, 4539.97) showed high heritability with high genetic advance and high genetic advance in percentage of mean revealed the possibility of predominance of additive gene effects. Number of primary branches per plant had showed highly significant positive association with number of secondary branches per plant (rg=0.597, rp= 0.537) and yield per plant (rg=0.43). Days to 50% flowering showed significant positive association with seeds per siliqua (rg=0.492; rp=0.436), 1000 seed weight (rg=0.486; rp=0.472) and yield per plant (rg=0.438; rp=0.379). Length of siliqua manifested highly significant positive association with siliqua per plant (rg=0.571; rp=0.514) and significant negative association with yield per plant (-0.471) at genotypic level. Siliqua per plant had highly significant negative association at both genotypic and phenotypic level with yield per plant (-0.697; -0.525) but 1000 seed weight had highly significant positive association with yield per plant both genotypic and phenotypic level (0.893; 0.814). The results of the path analysis revealed that 1000 seed weight (0.766) had the maximum direct effect and the maximum negative direct effect was observed in seeds per siliqua (0.305). In summary, the results suggested that there were some yield related traits such as 1000 seed weight and days to 50% flowering could be selected and used in breeding program for increasing the grain yield of rapeseed.

Keywords: Genetic variability; Germplasm; Correlation coefficient; Path coefficient; Brassica napus

Location:

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Mustard

Objectives:

The present study was undertaken to find out and establish suitable selection criteria for higher seed yield through study of genetic variability, heritability, genetic advance, correlation among different characters and the direct and indirect effect of these characters towards seed yield.

Methodology:

The present research work was carried out in the experimental farm, Sher-e-Bangla Agricultural University (SAU), Dhaka during November 2005-March 2006. The location of the site is 23° 74′ N latitude and 90° 35′ E longitude with an elevation of 8.2 meter from sea level. The soil of the experimental plots was clay loam and the land was medium high with medium fertility level. Fourteen Brassica napus genotypes were used in this experiment. The experiment was set up in a RCBD design with three replications, following 30 cm x 10 cm spacing. The unit plot size was 5m×25 m and block to block distance was 1.5 m. The plot was fertilized with 250, 170, 85, 150, 5 Kg/ha Urea, TSP, MOP, Gypsum and Borax respectively. Standard agronomic practices were carried out to raise healthy crop. Harvesting was done when 80% of the plants showed symptoms of maturity i.e. straw colour of siliquae, leaves, stem and desirable seed colour in the matured siliquae. Ten plants were selected at random from all genotypes in each plot and data were recorded on plant height (cm), number of primary branches per plant, number of secondary branches per plant, length of siliqua (cm), number of seeds per siliqua, number of siliquae per plant, days to 50% flowering, days to maturity, 1000 seed weight (g) and yield per plant (g). The data were analyzed for different genetic components. Phenotypic and genotypic variance was estimated by the formula used by (Johnson et al., 1955). Heritability and genetic advance were measured using the formula given by (Singh and Chaudhary, 1985) and (Allard, 1960). Genotypic and phenotypic coefficient of variation was calculated by the formula of (Burton, 1952). Simple correlation coefficient was obtained using the formula suggested by (Singh and Chaudhary, 1985) and path co-efficient analysis was done following the method outlined by (Dewey and Lu, 1959).

Source of Information: Bangladesh J. Pl. Breed. Genet., 26(2): 15-22, 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The overall outcome of the present investigation depicts that a wide variation existed among the rape seed genotypes. Also there was correlation of different yield components with the yield of rape seed.

Knowledge Management: Journal