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Performance of Source Nursary of Pollen Parent and Cms Lines of Brassica Napus L.

S. C. Saha
Plant Breeder
Research and Development Farm, Supreme Seed Company Ltd., Dhaka, Bangladesh

Sabina Yeasmin
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

A. K. M. Aminul Islam
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706, Bangladesh

M. G. Rasul
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706, Bangladesh

M. A. K. Mian
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706, Bangladesh

Abstract/ Executive Summary:

The study was conducted with the objective to know the performance of floral and yield characteristics of pollen and CMS parent. Significant variation was observed for flowering and yield contributing characteristics among two CMS lines (Z1 and Z2) and 21 pollen parents. The pollen parent Nap2019 was found as early flowering whereas the parent Nap2013 was the late for first flowering. The highest length of anther was found in Nap9907 and short anther in Nap9905. Slender anther was produced by the genotype Nap2037 and bold anther was produced by the genotype Nap9907. Length of filament was the highest in Nap2012 and the lowest in Nap0130. For yield contributing characteristics, the genotype Nap9906 matured earlier than all other genotypes while the maximum duration took by Nap2013. The longest inflorescence was found in the genotype Nap2001 and the smallest in Nap9906. The highest number of siliqua per plant was counted in Nap2066 and it was the lowest in Nap9906. Wide variability in respect of number of seeds per siliqua was exhibited among the genotypes and it was the lowest in Nap9901 and the highest in Nap94006. In case of 1000-seed weight, the genotype Nap2022 produced larger seeds and the genotype Nap9907 produced smaller seeds. The highest seed yield per plant was recorded in the genotype Nap2066 and the lowest in Nap9905. In case of CMSZ1 and CMSZ2, 50% plants were flowered within 45 days after sowing. The CMS plant produced small, slender anther with shorter filament compare to pollen parents. The out crossing rate of CMSZ1 and CMSZ2 was 40.31% and 47.96%, respectively. Time required for days to 80% maturity of CMSZ1 and CMSZ2 were about 106 days. The number of siliqua per plant was found the highest in CMSZ1 and the lowest in CMSZ2. The average number of seeds per siliqua and seed yield per plant was recorded the highest in CMSZ1 and the lowest in CMSZ2. The pollen parent with desirable performance and CMS parents CMSZ2 having higher out crossing rate can be used for future Brassica napus hybrid breeding program.

Keywords: Rapeseed (Brassica napus L), Pollen parent, CMS line, Floral characteristics, Seed yield

Location: The experimental farm, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur, Bangladesh.

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Fertilizer

Objectives:

To evaluate pollen parent and CMS lines for different morphological, floral and agronomic traits.

Methodology:

The research work was conducted at the experimental farm, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur, Bangladesh. Among twenty three genotypes, two were CMS (Cytoplasmic Male Sterile) lines (Z₁ and Z₂: two different cytoplasmic sources) and twenty one male parents or pollen parents (parents from where pollen collected) were used as plant materials. The pollen parent and CMS lines were grown in different row in the experimental field with row spacing of 30 cm between row and plant spacing of 15 cm within the row. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Fertilizers were applied at the rate of 270, 170, 100, 150, 5 kg/ha of Urea, TSP, MP, Gypsum and Zinc sulphate, respectively. Cowdung was applied at the rate of 10 M ton/ha. Whole amount of cowdung TSP, MP, Gypsum, Zinc sulphate and half of Urea were applied at the time of final land preparation. The remaining urea was top dressed at 30 days after seedlings emergence. Necessary intercultural operation was taken during cropping period for proper growth and development of the plants. Thinning and first weeding was done at 10 days after emergence (DAE). The second weeding was done at 30 DAE followed by application of urea by top dressing. Irrigation was given at regular interval when necessary. For suppression of aphid population Malathion 57 EC was applied three times as foliar spray at an interval of 10-15 days after seedling emergence. Data were collected from five randomly selected competitive plants of each of the entries on the characters days to 1st flowering, days to 50% flowering, number of primary branches per plant, days to 80% maturity, plant height at maturity (cm), length of inflorescence (cm), number of siliqua per plant, length of siliqua (cm), number of seeds per siliqua, 1000-seed weight (g), anther length (mm), anther breadth (mm), length of filament (mm), length of stamen (mm), seed yield per plant (g). Out crossing rate (%) was determined for CMS lines.

Source of Information: Journal of Agricultural Science Vol. 3, No. 2; June 2011, doi:10.5539/jas.v3n2p114, www.ccsenet.org/jas

Article Link (Online Journal):

Funding Source:

1.	Budget: 240000

Total Budget (Tk.) :

Achievement/Findings:

From the present study it can be concluded that pollen parent with desirable performance can be test cross with CMS lines to develop new CMS lines or restorer lines depending on gene presence in their genome. On the basis of yield contributing characters and higher seed yield potential, the genotypes Nap2066, Nap9906, Nap94006 and Nap2022 are recommended for test cross with CMS line develop maintainer or restorer lines. Information on morph-physiological, floral and yield traits of pollen as well as CMS parent can helps to identify suitable genotypes for commercial hybrids. The CMS parents CMSZ2 having higher out crossing rate can be used for future Brassica napus hybrid breeding program.

Knowledge Management: Journal