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Diversity Assessment of Yield, Yield Contributing Traits, and Earliness of Advanced T-aman Rice (oryza Sativa L.) Lines

Md. Hasan Shahriar
Department of Genetics and Plant Breeding, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh

Arif Hasan Khan Robin
Department of Genetics and Plant Breeding, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh

Ahasanul Hoque
Department of Genetics and Plant Breeding, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh

Abstract/ Executive Summary:

Thirty advanced T. Aman rice (Oryza sativa L.) breeding lines along with four checks were studied at the experimental farm of the Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh. The experiment was conducted following Randomized Complete Block Design (RCBD) with three replications. The objective of the study was to know variability in yield, yield contributing characters and earliness of studied lines, and to identify short duration rice genotypes at F9 generation. The genotypes differed significantly for plant height (cm), length of panicle, total number of tiller per hill, effective tiller number per hill, filled grains per panicle, unfilled grains per panicle, days to 50% flowering, days to maturity, 1000 grains weight and yield per plot (Kg plot^-1 ). Considering all the traits genotype R7 was the earliest compared to all other genotypes which took 113 days for maturity. The genotype R16 recorded the highest yield, took 118 days for maturity, and that was significantly higher than check varieties. Phenotypic coefficient of variation (PCV) were higher than genotypic coefficient of variation (GCV) for all the traits studied indicating that the measured traits interacted with the environment to some extent. All the studied traits expressed moderate to high heritability estimates. High heritability along with high genetic advance was noticed for the following traits: number of filled grain per panicle, number of unfilled grain per panicle and plant height. Data suggests a few promising breeding lines might be potential as short duration and high yielding T. Aman variety.

Keywords: Oryza sativa, Variability, GCV, PCV, Heritability, Genetic advance, F9 generation, Advanced breeding lines

Location: Field Laboratory, Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh

Start Date: 00-12-2013

End Date: 00-05-2014

Program Area: Variety and Species

Commodity: Rice

Objectives:

To know variability in yield, yield contributing characters and earliness of studied lines
To identify short duration rice genotypes at F9 generation.

Methodology:

Thirty advanced breeding lines along with four check varieties viz. BINA dhan7, BRRI dhan39, BRRI dhan49, BRRI dhan57 were used in the present study. The advanced breeding lines were originated from the hybridazation programme carried out at International Rice Research Institute using different breeding lines under PETRA (Poverty Elimination through Rice Research Activities) project. A Randomized Complete Block Design with three replications was used to carry out the experiment. The individual plot size was 2.5 m × 2 m (5 square m). Data were recorded to estimate the traits viz., plant height (cm), length of panicle (cm), total number of tiller per hill, effective tiller number per hill, filled grains per panicle, unfilled grains per panicle, days to 50% flowering, days to maturity, 1000 grains weight (g) and yield per plot (kg). The genotypes used in the experiment : Thirtyfour transplant aman rice genotypes were used in the experiment. Estimation of genotypic and phenotypic variances: Genotypic and phenotypic variances were estimated according to the formula. Statistical analysis: Analyses of variances of the data were carried out using Minitab 17 statistical software package.

Source of Information: Journal of Bioscience and Agriculture Research , Vol. 01(02): 102-112, 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In this study 30 advanced rice breeding lines at F9 exhibited high variability. The results therefore suggested that selecting a line for shorter growth duration of 113 days with comparatively higher yield would be possible from those genotypes.

Knowledge Management: Journal