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Development of Parental Materials

Dr. Md. Jamil Hasan
Principal Scientific Officer
Head, Hybrid Rice Division, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

From material development program, parental lines of hybrid rice is generated. This program is very important. Find out new sources of maintainer and restorer lines is the main goal of material development program. Conversion of new suspected maintainer lines is shifted to new CMS lines in the background of elite maintainer lines are done under back cross nursery. After six generation of back crossing upon stability of sterility and other desirable characters new CMS lines are developed and started evaluation under CMS maintenance and evaluation nursery. Genetic purity of developed and exotically collected CMS lines are maintained under it through hand crossing.

Keywords: Material development, CMS, Maintainer, Restorer lines

Location: BRRI HQ, Gazipur

Start Date: 22-06-2006

End Date: 10-11-2006

Program Area: Variety and Species

Commodity: Rice

Objectives:

Developing CMS lines from the adaptable varieties/lines suitable for Bangladesh, ii) Maintenance & evaluation of exotic/locally developed CMS lines, iii) Selection of heterotic rice hybrids & usable parental materials.

Methodology:

Material development program comprises of four experiments. 1. Source Nursery 2. Test cross Nursery 3. Back cross Nursery 4. CMS Maintenance & Evaluation Nursery. In source nursery elite advance lines is used to make test cross with CMS lines. In test cross nursery, test crosses is used which is made from source nursery. Back cross nursery, comprises those entries which showed complete sterility in test cross nursery. CMS maintenance & evaluation nursery comprises CMS lines along with its corresponding maintainer lines for maintaining its genetic purity through hand crossing.

Source of Information: BRRI annual report 2006-2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 80000/-

Total Budget (Tk.) : 80000/-

Achievement/Findings:

New CMS and restorer lines are developed from material development program. New heterotic hybrid combinations are identified from test cross nursery. This is the core work of hybrid rice breeding and development of new hybrid combinations

Knowledge Management: Report/Proceedings