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Screening for Deep Seeding Emergence and Fast Seedling Growth.

Mrs. Munnujan Khanam
Senior scientific officer
Plant Physiology Division, BRRI, Gazipur

Dr. Serajul Islam
CSO and Head
Plant Physiology Division, BRRI, Gazipur

Abstract/ Executive Summary:

The study was conducted at BRRI, Gazipur. To fulfill the objectives,seeds of some advance breeding lines were sown in a tray. BR24, BRRI dhan42 BRRI dhan43 were used as check.Data were recorded at every alternate day. The result indicate that the percent seedling emergence was considerably higher in 2 cm depth. At 2-cm depth seedling emergence of most of the lines completed within 3-4 days while at 6 depths it took 6-7 days. The percent of seedling emergence at 2-cm depth were more than 85% for all the breed ling lines. Among the 22 lines the emergence index of 7 breeding lines were above 0.60. The responses for fast seedling growth of all the lines were examined using regression analysis.The regression co-efficient was the change in seedling height (cm) per unit increase time (two day). Among the 7 lines, four lines exhibited higher seedling growth (>6 cm/2 days) compared to check varieties. The changing rate of seedling height of eight breeding lines were low (<5 cm/2 days).

Keywords: Rice, Screening of deep seeding emergence, Fast seedling growth.

Location: Plant Physiology Division, BRRI, Gazipur

Start Date: 00-07-2004

End Date: 00-06-2005

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To breeding identify the lines which can emerge when seeded deep in the soil.
To breeding identify the lines which have fast seedling growth.

Methodology:

The study was conducted at BRRI, Gazipur. Seeds of some advance breeding lines were sown in a tray containing soil with 50% sand. Each entry was sown in a line and 20 seeds in each were maintained at two sowing depths of 2 cm and 6 cm. BR24, BRRI dhan42and BRRI dhan43 were used as check. Number of emergence, seedling height for fast seedling growth was measured at every alternate day.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2004-2005 (Held on 18-22 December 2005). Bangladesh Rice Research Institute (BRRI),Gazipur-1701.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The emergence indexes of seven breeding lines were above 0.60. Among these breeding lines, BR6968-2B-5-6, BR6846-2B-5-2, BR6858-2B-5-2 & IR75516-30-1-1-B exhibited seedling (>.60 cm/2 days) faster than check varieties.

Knowledge Management: Report/Proceedings