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Seed Yield in Relation to Ontogenetic Growth in Rapeseed Mutants.

Shahidur Rahman Badhan
MS student
MS Student, Dept Crop Bot., Bangladesh Agricultural University, Mymensingh

Dr. M. A. Malek
Principal Scientific Officer
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Prof. Dr. Md. Shahidur Rahman
Professor
Dept Crop Bot., Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

A field experiment was conducted at the experimental farm of the Bangladesh Institute of Nuclear Agriculture, Mymensingh, during the period from November 2009 to February 2010 to investigate morphological, growth, biochemical, yield attributes and seed yield in six Brassica juncea mutants viz., MM 01, MM 02, MM 04, MM 08, MM 09 and MM 10 along with a cultivar, BARIsarisa-11. Results revealed that high yielding genotypes had taller plant, higher number of branches and LA plant^-1, higher LAI, AGR, biochemical parameters and yield attributes resulting higher seed yield than low yielding ones. The mutant MM 10 showed superiority in respect of plant height, TDM, LA, LAI, AGR and biochemical parameters resulting superior yield attributes as well as seed yield (2733 kg ha^-1) but took longer days to maturity (113 days) followed by MM 02 (2517 kg ha^-1). In contrast, MM 09 showed the inferiority in case of LA, LAI, TDM, AGR, biochemical parameters and siliqua number and also showed lower seed yield (1867 kg ha^-1). Among the mutants/variety, MM 04 matured earliest, took 109 days only with medium yield performance (2250 kg ha^-1) which fit for cultivation in the existing cropping pattern.

Keywords: Rapeseed, Growth, Photosynthesis, Yield attributes, Yield

Location: Experimental field of BINA, Mymensingh

Start Date: 11-11-2009

End Date: 28-02-2010

Program Area: Variety and Species

Commodity: Mustard

Objectives:

To investigate morpho-physiological characters, yield attributes and seed yield in seven Brassica juncea mutants/variety.

Methodology:

The experiment was carried out at the Field Laboratory, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, during the period from 11 November 2009 to 28 February 2010. The seven juncea mutants/variety were MM 01, MM 02, MM 04, MM 08, MM 09, MM 10 and BARIsarisa-11 were taken for study. The experiment was laid out in a Randomized Complete Block Design with 3 replications. The size of the unit plot was 4.0 m x 2.5 m. Plant to plant and row to row distances were maintained as 5-8 cm and 30 cm, respectively. The doses of fertilizers were: urea 250, TSP 160, MP 80, gypsum 180 and borax 2.0 kg ha^-1. Recommended cultural practices were followed for normal plant growth and development. To study ontogenetic growth characteristics, a total of five harvests were made. At final harvest, data were collected on some morpho-physiological parameters, yield attributes and yield. The first crop sampling was done at 30 DAS and continued at an interval of 10 days up to 70 DAS. From each sampling, five plants were randomly selected from each plot and uprooted for collecting necessary data. The plants were separated into leaves, stems and roots and the corresponding dry weight were recorded after oven drying at 80 ± 2 ⁰C for 72 hours. The growth analysis like AGR and RGR were carried out following the formulae of Hunt (1978). At harvest, 10 plants were randomly selected from each plot for collecting necessary morphological, reproductive and yield contributing characters. The plots were harvested separately and the yield converted into tons/ha. The collected data were analyzed statistically.

Source of Information: MS Thesis, Examination Roll No. 09Ag. CBot. JD-18M, Semester: July-December 2010, Registration No. 35889 Session: 2009-10, Dept. Crop Bot., BAU, Mymensingh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

High yielding mutants have taller plant, higher number of branches, higher LA as well as LAI, TDM, AGR, chlorophyll, photosynthesis, total sugar and nitrate reductase activity in leaves which resulted higher number of pods plant^-1, seeds pod^-1and bolder seed size than the low yielder in B. juncea; and Among the mutants/variety, MM 10 produced the highest seed yield which might be due to its morpho-physiological superiority than the others.

Knowledge Management: Thesis