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Variability, Correlation and Path Analysis in F2 Progenies of Inter-varietal Crosses of Brassica Rapa

S. Ara
Agricultural Training Institute, Faridpur, Bangladesh

S. Afroz
Departments of Agricultural Extension, Dhumki,Patuakhali, Bangladesh.

M. S. Noman
On-Farm Research Division, BARI, Bogra.

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

M. I. K. Zia
Bangladesh AgricultureDevelopment Corporation, Potato Seed Division, Faridpur, Bangladesh

Abstract/ Executive Summary:

Eight F₂populations generated through inter-varietal crosses, along with three check varieties of Brassica rapa were evaluated to study the variation in different characters, correlation between pairs of different characters and the direct and indirect effect of different characters on seed yield per plant to select the plants with higher yield potential. From the values of mean, range and (CV%) of seed yield and yield contributing characters it was confirmed that there were considerable variation present among all the genotypes used in the experiment. The values of phenotypic variances were higher than the cor responding genotypic variances. Number of branches per plant, length of siliqua, seeds per siliqua, 1000 seed weight and yield per plant showed least difference between phenotypic and genotypic variances. The values of GCV and PCV indicated that there was least variation present among most of the characters studied. The number of branches per plant, days to 50% flowering, days to maturity and length of siliqua had showed high heritability with low genetic advance and genetic advance in percentage of mean. Yield per plant had significant and highest positive correlation with plant height, days to 50% maturity, length of siliqua and seeds per siliqua. The path co-efficient analysis revealed that siliqua per plant had the highest positive direct effect followed by seeds per siliqua, length of siliqua and plant height. Sixteen most promising plants with higher yield were selected for cultivation.

Keywords: Brassica rapa, Correlation, Genetic variability, F2 segregating population, Path analysis

Location: Experimental farm of Sher-e-Bangla Agricultural University

Start Date: 00-11-2009

End Date: 00-03-2010

Program Area: Variety and Species

Commodity: Mustard

Objectives:

1. To study the variability in F₂ segregating generations to select the desired plant types and to find out the relationship among the different traits and their contribution to the yield.

Methodology:

The experiment was conducted at the experimental farm of Sher-e-Bangla Agricultural University, during November, 2009 to March, 2010. A total number of eleven different populations obtained from eleven different cross consideration materials were used in this experiment where eight were F2 segregating generations and three were checks varieties. All the Materials were collected from Department of Genetics and Pant Breeding, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. The materials used in that experiment are SS 75 × SAU 1, SS 75 × BARI 15, BARI 15 × BARI 6, BARI 6 × TORI 7, BARI 15 × SS 75, R TORI 7 × SAU 1, BARI 11 × TORI 7, BARI 10 × BARI 15, BARI sharisha 11, BARI sharisha 15 and SAU sarisha 1. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The total area under the experiment was 56 m × 14m = 784 m². Each plot size was 56 m × 3.5 m, and the distance between plots to plot was 1 m. The spacing between lines was 30 cm. The data were recorded on fourty selected plants for each cross and ten selected plants for each parent on the plant height (PH), number of branches per plant (NBP), days to 50% flowering (50%DF), days to 50% maturity (50%DM), number of siliqua per plant (NSP), siliqua length (SL), number of seeds per siliqua (NSS), 1000 seed weight (SW) and yield per plot (YP). The data were statistically analyzed for different components.

Source of Information: J. Environ. Sci. & Natural Resources, 6(1): 217 - 220, 2013; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Considering heritability, genetic advance, genetic advance in % of mean, correlation, path coefficient analysis for the characters under study and comparing the crosses with three check varieties sixteen most promising plants with good yield and yield contributing characters were selected from the crosses BARI 15 × SS 75, TORI 7 × SAU 1 and BARI 11 × TORI 7.

Knowledge Management: Journal